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序言
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1. Kubernetes与云原生应用概览
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2. 概念原理
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2.1 设计理念
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2.2 Objects
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2.2.1 Pod
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2.2.1.1 Pod解析
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2.2.1.2 Init容器
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2.2.1.3 Pod安全策略
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2.2.1.4 Pod的生命周期
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2.2.2 Node
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2.2.3 Namespace
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2.2.4 Service
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2.2.5 Volume和Persistent Volume
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2.2.6 Deployment
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2.2.7 Secret
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2.2.8 StatefulSet
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2.2.9 DaemonSet
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2.2.10 ServiceAccount
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2.2.11 ReplicationController和ReplicaSet
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2.2.12 Job
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2.2.13 CronJob
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2.2.14 Ingress
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2.2.15 ConfigMap
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2.2.15.1 ConfigMap的热更新
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2.2.16 Horizontal Pod Autoscaling
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2.2.17 Label
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2.2.18 垃圾收集
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2.2.19 NetworkPolicy
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2.2.20 Annotation
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3. 用户指南
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3.1 资源对象配置
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3.1.1 配置Pod的liveness和readiness探针
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3.1.2 配置Pod的Service Account
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3.1.3 Secret配置
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3.2.3 管理namespace中的资源配额
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3.2 命令使用
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3.2.1 docker用户过度到kubectl命令行指南
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3.2.2 kubectl命令概览
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3.2.3 kubectl命令技巧大全
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3.3 集群安全性管理
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3.3.1 管理集群中的TLS
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3.3.2 kubelet的认证授权
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3.3.3 TLS bootstrap
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3.3.4 创建用户认证授权的kubeconfig文件
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3.3.5 RBAC——基于角色的访问控制
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3.3.6 IP伪装代理
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3.4 访问 Kubernetes 集群
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3.4.1 访问集群
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3.4.2 使用 kubeconfig 文件配置跨集群认证
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3.4.3 通过端口转发访问集群中的应用程序
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3.4.4 使用 service 访问群集中的应用程序
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3.5 在kubernetes中开发部署应用
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3.5.1 适用于kubernetes的应用开发部署流程
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3.5.2 迁移传统应用到kubernetes中——以Hadoop YARN为例
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3.5.3 使用StatefulSet部署用状态应用
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4. 最佳实践
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4.1 在CentOS上部署kubernetes1.6集群
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4.1.1 创建TLS证书和秘钥
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4.1.2 创建kubeconfig文件
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4.1.3 创建高可用etcd集群
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4.1.4 安装kubectl命令行工具
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4.1.5 部署master节点
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4.1.6 部署node节点
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4.1.7 安装kubedns插件
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4.1.8 安装dashboard插件
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4.1.9 安装heapster插件
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4.1.10 安装EFK插件
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4.2 服务发现与负载均衡
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4.2.1 安装Traefik ingress
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4.2.2 分布式负载测试
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4.2.3 网络和集群性能测试
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4.2.4 边缘节点配置
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4.2.5 安装Nginx ingress
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4.3 运维管理
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4.3.1 服务滚动升级
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4.3.2 应用日志收集
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4.3.3 配置最佳实践
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4.3.4 集群及应用监控
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4.3.6 数据持久化问题
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4.3.7 管理容器的计算资源
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4.4 存储管理
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4.4.1 GlusterFS
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4.4.1.1 使用GlusterFS做持久化存储
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4.4.1.2 在OpenShift中使用GlusterFS做持久化存储
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4.4.2 CephFS
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4.4.2.1 使用Ceph做持久化存储
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4.5 集群与应用监控
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4.5.1 Heapster
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4.5.1.1 使用Heapster获取集群和对象的metric数据
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4.5.2 Prometheus
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4.5.2.1 使用Prometheus监控kubernetes集群
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4.6 服务编排管理
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4.6.1 使用Helm管理kubernetes应用
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4.6.2 构建私有Chart仓库
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4.7 持续集成与发布
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4.7.1 使用Jenkins进行持续集成与发布
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4.7.2 使用Drone进行持续集成与发布
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4.8 更新与升级
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4.8.1 手动升级kubernetes集群
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4.8.2 升级dashboard
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5. 领域应用
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5.1 微服务架构
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5.1.1 微服务中的服务发现
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5.2 Service Mesh 服务网格
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5.1.1 Istio
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5.1.1.1 安装并试用Istio service mesh
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5.1.1.2 配置请求的路由规则
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5.1.1.3 安装和拓展Istio service mesh
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5.1.1.4 集成虚拟机
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5.1.2 Linkerd
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5.1.2.1 Linkerd 使用指南
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5.2 大数据
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5.2.1 Spark standalone on Kubernetes
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< li class = "chapter " data-level = "1.6.3.2" data-path = "../usecases/running-spark-with-kubernetes-native-scheduler.html" >
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< a href = "../usecases/running-spark-with-kubernetes-native-scheduler.html" >
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5.2.2 运行支持kubernetes原生调度的Spark程序
< / a >
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< / li >
< / ul >
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< / li >
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< li class = "chapter " data-level = "1.6.4" data-path = "../usecases/serverless.html" >
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< a href = "../usecases/serverless.html" >
5.3 Serverless架构
< / a >
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< / li >
< li class = "chapter " data-level = "1.6.5" data-path = "../usecases/edge-computing.html" >
< a href = "../usecases/edge-computing.html" >
5.4 边缘计算
< / a >
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< / li >
< / ul >
< / li >
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< li class = "chapter " data-level = "1.7" data-path = "../develop/" >
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< a href = "../develop/" >
6. 开发指南
< / a >
< ul class = "articles" >
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< li class = "chapter " data-level = "1.7.1" data-path = "../develop/developing-environment.html" >
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< a href = "../develop/developing-environment.html" >
6.1 开发环境搭建
< / a >
< / li >
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< li class = "chapter " data-level = "1.7.2" data-path = "../develop/testing.html" >
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< a href = "../develop/testing.html" >
6.2 单元测试和集成测试
< / a >
< / li >
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< li class = "chapter " data-level = "1.7.3" data-path = "../develop/client-go-sample.html" >
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< a href = "../develop/client-go-sample.html" >
6.3 client-go示例
< / a >
< / li >
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< li class = "chapter " data-level = "1.7.4" data-path = "../develop/contribute.html" >
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< a href = "../develop/contribute.html" >
6.4 社区贡献
< / a >
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< / li >
< li class = "chapter " data-level = "1.7.5" data-path = "../develop/minikube.html" >
< a href = "../develop/minikube.html" >
6.5 Minikube
< / a >
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< / li >
< / ul >
< / li >
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< li class = "chapter " data-level = "1.8" data-path = "../appendix/" >
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< a href = "../appendix/" >
7. 附录
< / a >
< ul class = "articles" >
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< li class = "chapter " data-level = "1.8.1" data-path = "../appendix/docker-best-practice.html" >
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< a href = "../appendix/docker-best-practice.html" >
7.1 Docker最佳实践
< / a >
< / li >
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< li class = "chapter " data-level = "1.8.2" data-path = "../appendix/issues.html" >
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< a href = "../appendix/issues.html" >
7.2 问题记录
< / a >
< / li >
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< li class = "chapter " data-level = "1.8.3" data-path = "../appendix/tricks.html" >
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< a href = "../appendix/tricks.html" >
7.3 使用技巧
< / a >
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< / li >
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< li class = "chapter " data-level = "1.8.4" data-path = "../appendix/debug-kubernetes-services.html" >
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< a href = "../appendix/debug-kubernetes-services.html" >
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7.4 kubernetes中的应用故障排查
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< / a >
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< / li >
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< li class = "chapter " data-level = "1.8.5" data-path = "../appendix/material-share.html" >
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< a href = "../appendix/material-share.html" >
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7.5 Kubernetes相关资讯和情报链接
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< / a >
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< / li >
< / ul >
< / li >
< li class = "divider" > < / li >
< li >
< a href = "https://www.gitbook.com" target = "blank" class = "gitbook-link" >
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本书使用 GitBook 发布
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< / a >
< / li >
< / ul >
< / nav >
< / div >
< div class = "book-body" >
< div class = "body-inner" >
< div class = "book-header" role = "navigation" >
<!-- Title -->
< h1 >
< i class = "fa fa-circle-o-notch fa-spin" > < / i >
< a href = ".." > 4.4.1.2 在OpenShift中使用GlusterFS做持久化存储< / a >
< / h1 >
< / div >
< div class = "page-wrapper" tabindex = "-1" role = "main" >
< div class = "page-inner" >
< div class = "search-plus" id = "book-search-results" >
< div class = "search-noresults" >
< section class = "normal markdown-section" >
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< h1 id = "在openshift中使用glusterfs做持久化存储" > 在 OpenShift中 使 用 GlusterFS做 持 久 化 存 储 < / h1 >
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< h3 id = "概述" > 概 述 < / h3 >
< p > 本 文 由 Daniel Messer（ Technical Marketing Manager Storage @RedHat） 和 Keith Tenzer（ Solutions Architect @RedHat） 共 同 撰 写 。 < / p >
< ul >
< li > < a href = "https://keithtenzer.com/2017/03/07/storage-for-containers-overview-part-i/" target = "_blank" > Storage for Containers Overview – Part I< / a > < / li >
< li > < a href = "https://keithtenzer.com/2017/03/24/storage-for-containers-using-gluster-part-ii/" target = "_blank" > Storage for Containers using Gluster – Part II< / a > < / li >
< li > < a href = "https://keithtenzer.com/2017/03/29/storage-for-containers-using-container-native-storage-part-iii/" target = "_blank" > Storage for Containers using Container Native Storage – Part III< / a > < / li >
< li > < a href = "https://keithtenzer.com/2017/04/07/storage-for-containers-using-ceph-rbd-part-iv/" target = "_blank" > Storage for Containers using Ceph – Part IV< / a > < / li >
< li > < a href = "https://keithtenzer.com/2017/04/05/storage-for-containers-using-netapp-ontap-nas-part-v/" target = "_blank" > Storage for Containers using NetApp ONTAP NAS – Part V< / a > < / li >
< li > < a href = "https://keithtenzer.com/2017/04/05/storage-for-containers-using-netapp-solidfire-part-vi/" target = "_blank" > Storage for Containers using NetApp SolidFire – Part VI< / a > < / li >
< / ul >
< h3 id = "gluster作为container-ready-storagecrs" > Gluster作 为 Container-Ready Storage(CRS)< / h3 >
< p > 在 本 文 中 ， 我 们 将 介 绍 容 器 存 储 的 首 选 以 及 如 何 部 署 它 。 Kusternet和 OpenShift支 持 GlusterFS已 经 有 一 段 时 间 了 。 GlusterFS的 适 用 性 很 好 ， 可 用 于 所 有 的 部 署 场 景 ： 裸 机 、 虚 拟 机 、 内 部 部 署 和 公 共 云 。 在 容 器 中 运 行 GlusterFS的 新 特 性 将 在 本 系 列 后 面 讨 论 。 < / p >
< p > GlusterFS是 一 个 分 布 式 文 件 系 统 ， 内 置 了 原 生 协 议 （ GlusterFS） 和 各 种 其 他 协 议 （ NFS， SMB， ...） 。 为 了 与 OpenShift集 成 ， 节 点 将 通 过 FUSE使 用 原 生 协 议 ， 将 GlusterFS卷 挂 在 到 节 点 本 身 上 ， 然 后 将 它 们 绑 定 到 目 标 容 器 中 。 OpenShift / Kubernetes具 有 实 现 请 求 、 释 放 和 挂 载 、 卸 载 GlusterFS卷 的 原 生 程 序 。 < / p >
< h3 id = "crs概述" > CRS概 述 < / h3 >
< p > 在 存 储 方 面 ， 根 据 OpenShift / Kubernetes的 要 求 ， 还 有 一 个 额 外 的 组 件 管 理 集 群 ， 称 为 “ heketi” 。 这 实 际 上 是 一 个 用 于 GlusterFS的 REST API， 它 还 提 供 CLI版 本 。 在 以 下 步 骤 中 ， 我 们 将 在 3个 GlusterFS节 点 中 部 署 heketi， 使 用 它 来 部 署 GlusterFS存 储 池 ， 将 其 连 接 到 OpenShift， 并 使 用 它 来 通 过 PersistentVolumeClaims为 容 器 配 置 存 储 。 我 们 将 总 共 部 署 4台 虚 拟 机 。 一 个 用 于 OpenShift（ 实 验 室 设 置 ） ， 另 一 个 用 于 GlusterFS。 < / p >
< p > 注 意 ： 您 的 系 统 应 至 少 需 要 有 四 核 CPU， 16GB RAM和 20 GB可 用 磁 盘 空 间 。 < / p >
< h3 id = "部署openshift" > 部 署 OpenShift< / h3 >
< p > 首 先 你 需 要 先 部 署 OpenShift。 最 有 效 率 的 方 式 是 直 接 在 虚 拟 机 中 部 署 一 个 All-in-One环 境 ， 部 署 指 南 见 < a href = "https://keithtenzer.com/2017/03/13/openshift-enterprise-3-4-all-in-one-lab-environment/" target = "_blank" > the “ OpenShift Enterprise 3.4 all-in-one Lab Environment” article.< / a > 。 < / p >
< p > 确 保 你 的 OpenShift虚 拟 机 可 以 解 析 外 部 域 名 。 编 辑 < code > /etc/dnsmasq.conf< / code > 文 件 ， 增 加 下 面 的 Google DNS： < / p >
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< pre > < code class = "lang-ini" > < span class = "hljs-attr" > server< / span > =< span class = "hljs-number" > 8.8< / span > .< span class = "hljs-number" > 8.8< / span >
< / code > < / pre >
< p > 重 启 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # systemctl restart dnsmasq< / span >
< span class = "hljs-comment" > # ping -c1 google.com< / span >
< / code > < / pre >
< h3 id = "部署gluster" > 部 署 Gluster< / h3 >
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< p > GlusterFS至 少 需 要 有 以 下 配 置 的 3台 虚 拟 机 ： < / p >
< ul >
< li > RHEL 7.3< / li >
< li > 2 CPUs< / li >
< li > 2 GB内 存 < / li >
< li > 30 GB磁 盘 存 储 给 操 作 系 统 < / li >
< li > 10 GB磁 盘 存 储 给 GlusterFS bricks< / li >
< / ul >
< p > 修 改 /etc/hosts文 件 ， 定 义 三 台 虚 拟 机 的 主 机 名 。 < / p >
< p > 例 如 （ 主 机 名 可 以 根 据 你 自 己 的 环 境 自 由 调 整 ） < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # cat /etc/hosts< / span >
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.16.99.144 ocp-master.lab ocp-master
172.16.128.7 crs-node1.lab crs-node1
172.16.128.8 crs-node2.lab crs-node2
172.16.128.9 crs-node3.lab crs-node3
< / code > < / pre >
< p > < strong > 在 3台 GlusterFS虚 拟 机 上 都 执 行 以 下 步 骤 < / strong > ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # subscription-manager repos --disable=" *" < / span >
< span class = "hljs-comment" > # subscription-manager repos --enable=rhel-7-server-rpms< / span >
< / code > < / pre >
< p > 如 果 你 已 经 订 阅 了 GlusterFS那 么 可 以 直 接 使 用 ， 开 启 < code > rh-gluster-3-for-rhel-7-server-rpms< / code > 的 yum源 。 < / p >
< p > 如 果 你 没 有 的 话 ， 那 么 可 以 通 过 EPEL使 用 非 官 方 支 持 的 GlusterFS的 社 区 源 。 < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # yum -y install http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm< / span >
< span class = "hljs-comment" > # rpm --import http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7< / span >
< / code > < / pre >
< p > 在 < code > /etc/yum.repos.d/< / code > 目 录 下 创 建 < code > glusterfs-3.10.repo< / code > 文 件 ： < / p >
< pre > < code class = "lang-ini" > < span class = "hljs-section" > [glusterfs-3.10]< / span >
< span class = "hljs-attr" > name< / span > =glusterfs-< span class = "hljs-number" > 3.10< / span >
< span class = "hljs-attr" > description< / span > =< span class = "hljs-string" > " GlusterFS 3.10 Community Version" < / span >
< span class = "hljs-attr" > baseurl< / span > =https://buildlogs.centos.org/centos/< span class = "hljs-number" > 7< / span > /storage/x< span class = "hljs-number" > 86_64< / span > /gluster-< span class = "hljs-number" > 3.10< / span > /
< span class = "hljs-attr" > gpgcheck< / span > =< span class = "hljs-number" > 0< / span >
< span class = "hljs-attr" > enabled< / span > =< span class = "hljs-number" > 1< / span >
< / code > < / pre >
< p > 验 证 源 已 经 被 激 活 。 < / p >
< pre > < code class = "lang-Bash" > < span class = "hljs-comment" > # yum repolist< / span >
< / code > < / pre >
< p > 现 在 可 以 开 始 安 装 GlusterFS了 。 < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # yum -y install glusterfs-server< / span >
< / code > < / pre >
< p > 需 要 为 GlusterFS peers打 开 几 个 基 本 TCP端 口 ， 以 便 与 OpenShift进 行 通 信 并 提 供 存 储 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # firewall-cmd --add-port=24007-24008/tcp --add-port=49152-49664/tcp --add-port=2222/tcp< / span >
< span class = "hljs-comment" > # firewall-cmd --runtime-to-permanent< / span >
< / code > < / pre >
< p > 现 在 我 们 可 以 启 动 GlusterFS的 daemon进 程 了 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # systemctl enable glusterd< / span >
< span class = "hljs-comment" > # systemctl start glusterd< / span >
< / code > < / pre >
< p > 完 成 。 GlusterFS已 经 启 动 并 正 在 运 行 。 其 他 配 置 将 通 过 heketi完 成 。 < / p >
< p > < strong > 在 GlusterFS的 一 台 虚 拟 机 上 安 装 heketi< / strong > < / p >
< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # yum -y install heketi heketi-client< / span >
< / code > < / pre >
< h3 id = "更新epel" > 更 新 EPEL< / h3 >
< p > 如 果 你 没 有 Red Hat Gluster Storage订 阅 的 话 ， 你 可 以 从 EPEL中 获 取 heketi。 在 撰 写 本 文 时 ， 2016年 10月 那 时 候 还 是 3.0.0-1.el7版 本 ， 它 不 适 用 于 OpenShift 3.4。 你 将 需 要 更 新 到 更 新 的 版 本 ： < / p >
< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # yum -y install wget< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # wget https://github.com/heketi/heketi/releases/download/v4.0.0/heketi-v4.0.0.linux.amd64.tar.gz< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # tar -xzf heketi-v4.0.0.linux.amd64.tar.gz< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # systemctl stop heketi< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # cp heketi/heketi* /usr/bin/< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # chown heketi:heketi /usr/bin/heketi*< / span >
< / code > < / pre >
< p > 在 < code > /etc/systemd/system/heketi.service< / code > 中 创 建 v4版 本 的 heketi二 进 制 文 件 的 更 新 语 法 文 件 ： < / p >
< pre > < code class = "lang-ini" > < span class = "hljs-section" > [Unit]< / span >
< span class = "hljs-attr" > Description< / span > =Heketi Server
< span class = "hljs-section" >
[Service]< / span >
< span class = "hljs-attr" > Type< / span > =simple
< span class = "hljs-attr" > WorkingDirectory< / span > =/var/lib/heketi
< span class = "hljs-attr" > EnvironmentFile< / span > =-/etc/heketi/heketi.json
< span class = "hljs-attr" > User< / span > =heketi
< span class = "hljs-attr" > ExecStart< / span > =/usr/bin/heketi --config=/etc/heketi/heketi.json
< span class = "hljs-attr" > Restart< / span > =< span class = "hljs-literal" > on< / span > -failure
< span class = "hljs-attr" > StandardOutput< / span > =syslog
< span class = "hljs-attr" > StandardError< / span > =syslog
< span class = "hljs-section" >
[Install]< / span >
< span class = "hljs-attr" > WantedBy< / span > =multi-user.target
< / code > < / pre >
< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # systemctl daemon-reload< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # systemctl start heketi< / span >
< / code > < / pre >
< p > Heketi使 用 SSH来 配 置 GlusterFS的 所 有 节 点 。 创 建 SSH密 钥 对 ， 将 公 钥 拷 贝 到 所 有 3个 节 点 上 （ 包 括 你 登 陆 的 第 一 个 节 点 ） ： < / p >
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< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # ssh-keygen -f /etc/heketi/heketi_key -t rsa -N ' ' < / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # ssh-copy-id -i /etc/heketi/heketi_key.pub root@crs-node1.lab< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # ssh-copy-id -i /etc/heketi/heketi_key.pub root@crs-node2.lab< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # ssh-copy-id -i /etc/heketi/heketi_key.pub root@crs-node3.lab< / span >
[root@crs-node1 ~]< span class = "hljs-comment" > # chown heketi:heketi /etc/heketi/heketi_key*< / span >
< / code > < / pre >
< p > 剩 下 唯 一 要 做 的 事 情 就 是 配 置 heketi来 使 用 SSH。 编 辑 < code > /etc/heketi/heketi.json< / code > 文 件 使 它 看 起 来 像 下 面 这 个 样 子 （ 改 变 的 部 分 突 出 显 示 下 划 线 ） ： < / p >
< pre > < code class = "lang-json" > {
< span class = "hljs-string" > " _port_comment" < / span > :< span class = "hljs-string" > " Heketi Server Port Number" < / span > ,
< span class = "hljs-string" > " port" < / span > :< span class = "hljs-string" > " 8080" < / span > ,
< span class = "hljs-string" > " _use_auth" < / span > :< span class = "hljs-string" > " Enable JWT authorization. Please enable for deployment" < / span > ,
< span class = "hljs-string" > " use_auth" < / span > :< span class = "hljs-literal" > false< / span > ,
< span class = "hljs-string" > " _jwt" < / span > :< span class = "hljs-string" > " Private keys for access" < / span > ,
< span class = "hljs-string" > " jwt" < / span > :{
< span class = "hljs-string" > " _admin" < / span > :< span class = "hljs-string" > " Admin has access to all APIs" < / span > ,
< span class = "hljs-string" > " admin" < / span > :{
< span class = "hljs-string" > " key" < / span > :< span class = "hljs-string" > " My Secret" < / span >
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},
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< span class = "hljs-string" > " _user" < / span > :< span class = "hljs-string" > " User only has access to /volumes endpoint" < / span > ,
< span class = "hljs-string" > " user" < / span > :{
< span class = "hljs-string" > " key" < / span > :< span class = "hljs-string" > " My Secret" < / span >
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}
},
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< span class = "hljs-string" > " _glusterfs_comment" < / span > :< span class = "hljs-string" > " GlusterFS Configuration" < / span > ,
< span class = "hljs-string" > " glusterfs" < / span > :{
< span class = "hljs-string" > " _executor_comment" < / span > :[
< span class = "hljs-string" > " Execute plugin. Possible choices: mock, ssh" < / span > ,
< span class = "hljs-string" > " mock: This setting is used for testing and development." < / span > ,
< span class = "hljs-string" > " It will not send commands to any node." < / span > ,
< span class = "hljs-string" > " ssh: This setting will notify Heketi to ssh to the nodes." < / span > ,
< span class = "hljs-string" > " It will need the values in sshexec to be configured." < / span > ,
< span class = "hljs-string" > " kubernetes: Communicate with GlusterFS containers over" < / span > ,
< span class = "hljs-string" > " Kubernetes exec api." < / span >
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],
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< span class = "hljs-string" > " executor" < / span > :< span class = "hljs-string" > " ssh" < / span > ,
< span class = "hljs-string" > " _sshexec_comment" < / span > :< span class = "hljs-string" > " SSH username and private key file information" < / span > ,
< span class = "hljs-string" > " sshexec" < / span > :{
< span class = "hljs-string" > " keyfile" < / span > :< span class = "hljs-string" > " /etc/heketi/heketi_key" < / span > ,
< span class = "hljs-string" > " user" < / span > :< span class = "hljs-string" > " root" < / span > ,
< span class = "hljs-string" > " port" < / span > :< span class = "hljs-string" > " 22" < / span > ,
< span class = "hljs-string" > " fstab" < / span > :< span class = "hljs-string" > " /etc/fstab" < / span >
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},
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< span class = "hljs-string" > " _kubeexec_comment" < / span > :< span class = "hljs-string" > " Kubernetes configuration" < / span > ,
< span class = "hljs-string" > " kubeexec" < / span > :{
< span class = "hljs-string" > " host" < / span > :< span class = "hljs-string" > " https://kubernetes.host:8443" < / span > ,
< span class = "hljs-string" > " cert" < / span > :< span class = "hljs-string" > " /path/to/crt.file" < / span > ,
< span class = "hljs-string" > " insecure" < / span > :< span class = "hljs-literal" > false< / span > ,
< span class = "hljs-string" > " user" < / span > :< span class = "hljs-string" > " kubernetes username" < / span > ,
< span class = "hljs-string" > " password" < / span > :< span class = "hljs-string" > " password for kubernetes user" < / span > ,
< span class = "hljs-string" > " namespace" < / span > :< span class = "hljs-string" > " OpenShift project or Kubernetes namespace" < / span > ,
< span class = "hljs-string" > " fstab" < / span > :< span class = "hljs-string" > " Optional: Specify fstab file on node. Default is /etc/fstab" < / span >
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},
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< span class = "hljs-string" > " _db_comment" < / span > :< span class = "hljs-string" > " Database file name" < / span > ,
< span class = "hljs-string" > " db" < / span > :< span class = "hljs-string" > " /var/lib/heketi/heketi.db" < / span > ,
< span class = "hljs-string" > " _loglevel_comment" < / span > :[
< span class = "hljs-string" > " Set log level. Choices are:" < / span > ,
< span class = "hljs-string" > " none, critical, error, warning, info, debug" < / span > ,
< span class = "hljs-string" > " Default is warning" < / span >
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],
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< span class = "hljs-string" > " loglevel" < / span > :< span class = "hljs-string" > " debug" < / span >
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}
}
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< / code > < / pre >
< p > 完 成 。 heketi将 监 听 8080端 口 ， 我 们 来 确 认 下 防 火 墙 规 则 允 许 它 监 听 该 端 口 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # firewall-cmd --add-port=8080/tcp< / span >
< span class = "hljs-comment" > # firewall-cmd --runtime-to-permanent< / span >
< / code > < / pre >
< p > 重 启 heketi： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # systemctl enable heketi< / span >
< span class = "hljs-comment" > # systemctl restart heketi< / span >
< / code > < / pre >
< p > 测 试 它 是 否 在 运 行 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # curl http://crs-node1.lab:8080/hello< / span >
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Hello from Heketi
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< / code > < / pre >
< p > 很 好 。 heketi上 场 的 时 候 到 了 。 我 们 将 使 用 它 来 配 置 我 们 的 GlusterFS存 储 池 。 该 软 件 已 经 在 我 们 所 有 的 虚 拟 机 上 运 行 ， 但 并 未 被 配 置 。 要 将 其 改 造 为 满 足 我 们 需 求 的 存 储 系 统 ， 需 要 在 拓 扑 文 件 中 描 述 我 们 所 需 的 GlusterFS存 储 池 ， 如 下 所 示 ： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # vi topology.json< / span >
{
< span class = "hljs-string" > " clusters" < / span > : [
{
< span class = "hljs-string" > " nodes" < / span > : [
{
< span class = "hljs-string" > " node" < / span > : {
< span class = "hljs-string" > " hostnames" < / span > : {
< span class = "hljs-string" > " manage" < / span > : [
< span class = "hljs-string" > " crs-node1.lab" < / span >
],
< span class = "hljs-string" > " storage" < / span > : [
< span class = "hljs-string" > " 172.16.128.7" < / span >
]
},
< span class = "hljs-string" > " zone" < / span > : 1
},
< span class = "hljs-string" > " devices" < / span > : [
< span class = "hljs-string" > " /dev/sdb" < / span >
]
},
{
< span class = "hljs-string" > " node" < / span > : {
< span class = "hljs-string" > " hostnames" < / span > : {
< span class = "hljs-string" > " manage" < / span > : [
< span class = "hljs-string" > " crs-node2.lab" < / span >
],
< span class = "hljs-string" > " storage" < / span > : [
< span class = "hljs-string" > " 172.16.128.8" < / span >
]
},
< span class = "hljs-string" > " zone" < / span > : 1
},
< span class = "hljs-string" > " devices" < / span > : [
< span class = "hljs-string" > " /dev/sdb" < / span >
]
},
{
< span class = "hljs-string" > " node" < / span > : {
< span class = "hljs-string" > " hostnames" < / span > : {
< span class = "hljs-string" > " manage" < / span > : [
< span class = "hljs-string" > " crs-node3.lab" < / span >
],
< span class = "hljs-string" > " storage" < / span > : [
< span class = "hljs-string" > " 172.16.128.9" < / span >
]
},
< span class = "hljs-string" > " zone" < / span > : 1
},
< span class = "hljs-string" > " devices" < / span > : [
< span class = "hljs-string" > " /dev/sdb" < / span >
]
}
]
}
]
}
< / code > < / pre >
< p > 该 文 件 格 式 比 较 简 单 ， 基 本 上 是 告 诉 heketi要 创 建 一 个 3节 点 的 集 群 ， 其 中 每 个 节 点 包 含 的 配 置 有 FQDN， IP地 址 以 及 至 少 一 个 将 用 作 GlusterFS块 的 备 用 块 设 备 。 < / p >
< p > 现 在 将 该 文 件 发 送 给 heketi： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # export HEKETI_CLI_SERVER=http://crs-node1.lab:8080< / span >
< span class = "hljs-comment" > # heketi-cli topology load --json=topology.json< / span >
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Creating cluster ... ID: 78cdb57aa362f5284bc95b2549bc7e7d
Creating node crs-node1.lab ... ID: ffd7671c0083d88aeda9fd1cb40b339b
Adding device /dev/sdb ... OK
Creating node crs-node2.lab ... ID: 8220975c0a4479792e684584153050a9
Adding device /dev/sdb ... OK
Creating node crs-node3.lab ... ID: b94f14c4dbd8850f6ac589ac3b39cc8e
Adding device /dev/sdb ... OK
2017-10-19 18:37:05 +08:00
< / code > < / pre >
< p > 现 在 heketi已 经 配 置 了 3个 节 点 的 GlusterFS存 储 池 。 很 简 单 ！ 你 现 在 可 以 看 到 3个 虚 拟 机 都 已 经 成 功 构 成 了 GlusterFS中 的 可 信 存 储 池 （ Trusted Stroage Pool） 。 < / p >
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< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # gluster peer status< / span >
Number of Peers: 2
Hostname: crs-node2.lab
Uuid: 93b34946-9571-46a8-983c-c9f128557c0e
State: Peer < span class = "hljs-keyword" > in< / span > Cluster (Connected)
Other names:
crs-node2.lab
Hostname: 172.16.128.9
Uuid: e3c1f9b0-be97-42e5-beda< span class = "hljs-_" > -f< / span > 70< span class = "hljs-built_in" > fc< / span > 05f47ea
State: Peer < span class = "hljs-keyword" > in< / span > Cluster (Connected)
< / code > < / pre >
< p > 现 在 回 到 OpenShift！ < / p >
< h3 id = "将gluster与openshift集成" > 将 Gluster与 OpenShift集 成 < / h3 >
< p > 为 了 集 成 OpenShift， 需 要 两 样 东 西 ： 一 个 动 态 的 Kubernetes Storage Provisioner和 一 个 StorageClass。 Provisioner在 OpenShift中 开 箱 即 用 。 实 际 上 关 键 的 是 如 何 将 存 储 挂 载 到 容 器 上 。 StorageClass是 OpenShift中 的 用 户 可 以 用 来 实 现 的 PersistentVolumeClaims的 实 体 ， 它 反 过 来 能 够 触 发 一 个 Provisioner实 现 实 际 的 配 置 ， 并 将 结 果 表 示 为 Kubernetes PersistentVolume（ PV） 。 < / p >
< p > 就 像 OpenShift中 的 其 他 组 件 一 样 ， StorageClass也 简 单 的 用 YAML文 件 定 义 ： < / p >
< pre > < code class = "lang-Bash" > < span class = "hljs-comment" > # cat crs-storageclass.yaml< / span >
kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
name: container-ready-storage
annotations:
storageclass.beta.kubernetes.io/is-default-class: < span class = "hljs-string" > " true" < / span >
provisioner: kubernetes.io/glusterfs
parameters:
resturl: < span class = "hljs-string" > " http://crs-node1.lab:8080" < / span >
restauthenabled: < span class = "hljs-string" > " false" < / span >
< / code > < / pre >
< p > 我 们 的 provisioner是 kubernetes.io/glusterfs， 将 它 指 向 我 们 的 heketi实 例 。 我 们 将 类 命 名 为 “ container-ready-storage” ， 同 时 使 其 成 为 所 有 没 有 显 示 指 定 StorageClass的 PersistentVolumeClaim的 默 认 StorageClass。 < / p >
< p > 为 你 的 GlusterFS池 创 建 StorageClass： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc create -f crs-storageclass.yaml< / span >
< / code > < / pre >
< h3 id = "在openshift中使用gluster" > 在 OpenShift中 使 用 Gluster< / h3 >
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< p > 我 们 来 看 下 如 何 在 OpenShift中 使 用 GlusterFS。 首 先 在 OpenShift虚 拟 机 中 创 建 一 个 测 试 项 目 。 < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc new-project crs-storage --display-name=" Container-Ready Storage" < / span >
< / code > < / pre >
< p > 这 会 向 Kubernetes/OpenShift发 出 storage请 求 ， 请 求 一 个 PersistentVolumeClaim（ PVC） 。 这 是 一 个 简 单 的 对 象 ， 它 描 述 最 少 需 要 多 少 容 量 和 应 该 提 供 哪 种 访 问 模 式 （ 非 共 享 ， 共 享 ， 只 读 ） 。 它 通 常 是 应 用 程 序 模 板 的 一 部 分 ， 但 我 们 只 需 创 建 一 个 独 立 的 PVC： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # cat crs-claim.yaml< / span >
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: my-crs-storage
namespace: crs-storage
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
< / code > < / pre >
< p > 发 送 该 请 求 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc create -f crs-claim.yaml< / span >
< / code > < / pre >
< p > 观 察 在 OpenShfit中 ， PVC正 在 以 动 态 创 建 volume的 方 式 实 现 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc get pvc< / span >
NAME STATUS VOLUME CAPACITY ACCESSMODES AGE
my-crs-storage Bound pvc-41ad5adb-107c-11e7-afae-000c2949cce7 1Gi RWO 58s
< / code > < / pre >
< p > 太 棒 了 ！ 你 现 在 可 以 在 OpenShift中 使 用 存 储 容 量 ， 而 不 需 要 直 接 与 存 储 系 统 进 行 任 何 交 互 。 我 们 来 看 看 创 建 的 volume： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc get pv/pvc-41ad5adb-107c-11e7-afae-000c2949cce7< / span >
Name: pvc-41ad5adb-107c-11e7-afae-000c2949cce7
Labels:
StorageClass: container-ready-storage
Status: Bound
Claim: crs-storage/my-crs-storage
Reclaim Policy: Delete
Access Modes: RWO
Capacity: 1Gi
Message:
Source:
Type: Glusterfs (a Glusterfs mount on the host that shares a pod< span class = "hljs-string" > ' s lifetime)
EndpointsName: gluster-dynamic-my-crs-storage
Path: vol_85e444ee3bc154de084976a9aef16025
ReadOnly: false
< / span > < / code > < / pre >
< p > What happened in the background was that when the PVC reached the system, our default StorageClass reached out to the GlusterFS Provisioner with the volume specs from the PVC. The provisioner in turn communicates with our heketi instance which facilitates the creation of the GlusterFS volume, which we can trace in it’ s log messages:< / p >
< p > 该 volume是 根 据 PVC中 的 定 义 特 别 创 建 的 。 在 PVC中 ， 我 们 没 有 明 确 指 定 要 使 用 哪 个 StorageClass， 因 为 heketi的 GlusterFS StorageClass已 经 被 定 义 为 系 统 范 围 的 默 认 值 。 < / p >
< p > 在 后 台 发 生 的 情 况 是 ， 当 PVC到 达 系 统 时 ， 默 认 的 StorageClass请 求 具 有 该 PVC中 volume声 明 规 格 的 GlusterFS Provisioner。 Provisioner又 与 我 们 的 heketi实 例 通 信 ， 这 有 助 于 创 建 GlusterFS volume， 我 们 可 以 在 其 日 志 消 息 中 追 踪 ： < / p >
< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # journalctl -l -u heketi.service< / span >
...
Mar 24 11:25:52 crs-node1.lab heketi[2598]: [heketi] DEBUG 2017/03/24 11:25:52 /src/github.com/heketi/heketi/apps/glusterfs/volume_entry.go:298: Volume to be created on cluster e
Mar 24 11:25:52 crs-node1.lab heketi[2598]: [heketi] INFO 2017/03/24 11:25:52 Creating brick 9e791b1daa12af783c9195941fe63103
Mar 24 11:25:52 crs-node1.lab heketi[2598]: [heketi] INFO 2017/03/24 11:25:52 Creating brick 3e06af2f855bef521a95ada91680d14b
Mar 24 11:25:52 crs-node1.lab heketi[2598]: [heketi] INFO 2017/03/24 11:25:52 Creating brick e4daa240f1359071e3f7ea22618cfbab
...
Mar 24 11:25:52 crs-node1.lab heketi[2598]: [sshexec] INFO 2017/03/24 11:25:52 Creating volume vol_85e444ee3bc154de084976a9aef16025 replica 3
...
Mar 24 11:25:53 crs-node1.lab heketi[2598]: Result: volume create: vol_85e444ee3bc154de084976a9aef16025: success: please start the volume to access data
...
Mar 24 11:25:55 crs-node1.lab heketi[2598]: Result: volume start: vol_85e444ee3bc154de084976a9aef16025: success
...
Mar 24 11:25:55 crs-node1.lab heketi[2598]: [asynchttp] INFO 2017/03/24 11:25:55 Completed job c3d6c4f9< span class = "hljs-built_in" > fc< / span > 74796f4a5262647dc790fe < span class = "hljs-keyword" > in< / span > 3.176522702s
...
< / code > < / pre >
< p > 成 功 ！ 大 约 用 了 3秒 钟 ， GlusterFS池 就 配 置 完 成 了 ， 并 配 置 了 一 个 volume。 默 认 值 是 replica 3， 这 意 味 着 数 据 将 被 复 制 到 3个 不 同 节 点 的 3个 块 上 （ 用 GlusterFS作 为 后 端 存 储 ） 。 该 过 程 是 通 过 Heketi在 OpenShift进 行 编 排 的 。 < / p >
< p > 你 也 可 以 从 GlusterFS的 角 度 看 到 有 关 volume的 信 息 ： < / p >
< pre > < code class = "lang-bash" > [root@crs-node1 ~]< span class = "hljs-comment" > # gluster volume list< / span >
vol_85e444ee3bc154de084976a9aef16025
[root@crs-node1 ~]< span class = "hljs-comment" > # gluster volume info vol_85e444ee3bc154de084976a9aef16025< / span >
Volume Name: vol_85e444ee3bc154de084976a9aef16025
Type: Replicate
Volume ID: a32168c8-858e-472a-b145-08c20192082b
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: 172.16.128.8:/var/lib/heketi/mounts/vg_147b43f6f6903be8b23209903b7172ae/brick_9e791b1daa12af783c9195941fe63103/brick
Brick2: 172.16.128.9:/var/lib/heketi/mounts/vg_72c0f520b0c57d807be21e9c90312f85/brick_3e06af2f855bef521a95ada91680d14b/brick
Brick3: 172.16.128.7:/var/lib/heketi/mounts/vg_67314f879686de975f9b8936ae43c5c5/brick_e4daa240f1359071e3f7ea22618cfbab/brick
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
< / code > < / pre >
< p > 请 注 意 ， GlusterFS中 的 卷 名 称 如 何 对 应 于 OpenShift中 Kubernetes Persistent Volume的 “ 路 径 ” 。 < / p >
< p > 或 者 ， 你 也 可 以 使 用 OpenShift UI来 配 置 存 储 ， 这 样 可 以 很 方 便 地 在 系 统 中 的 所 有 已 知 的 StorageClasses中 进 行 选 择 ： < / p >
2017-10-20 10:51:14 +08:00
< figure id = "fig1.5.4.1.2.1" > < img src = "https://keithtenzer.files.wordpress.com/2017/03/screen-shot-2017-03-23-at-21-50-34.png?w=440" alt = "Screen Shot 2017-03-23 at 21.50.34" > < figcaption > 图 片 - Screen Shot 2017-03-23 at 21.50.34< / figcaption > < / figure >
< figure id = "fig1.5.4.1.2.2" > < img src = "https://keithtenzer.files.wordpress.com/2017/03/screen-shot-2017-03-24-at-11-09-341.png?w=440" alt = "Screen Shot 2017-03-24 at 11.09.34.png" > < figcaption > 图 片 - Screen Shot 2017-03-24 at 11.09.34.png< / figcaption > < / figure >
2017-08-21 18:44:34 +08:00
< p > 让 我 们 做 点 更 有 趣 的 事 情 ， 在 OpenShift中 运 行 工 作 负 载 。 < / p >
< p > 在 仍 运 行 着 crs-storage项 目 的 OpenShift虚 拟 机 中 执 行 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc get templates -n openshift< / span >
< / code > < / pre >
< p > 你 应 该 可 以 看 到 一 个 应 用 程 序 和 数 据 库 模 板 列 表 ， 这 个 列 表 将 方 便 你 更 轻 松 的 使 用 OpenShift来 部 署 你 的 应 用 程 序 项 目 。 < / p >
< p > 我 们 将 使 用 MySQL来 演 示 如 何 在 OpenShift上 部 署 具 有 持 久 化 和 弹 性 存 储 的 有 状 态 应 用 程 序 。 Mysql-persistent模 板 包 含 一 个 用 于 MySQL数 据 库 目 录 的 1G空 间 的 PVC。 为 了 演 示 目 的 ， 可 以 直 接 使 用 默 认 值 。 < / p >
2017-10-19 18:37:05 +08:00
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc process mysql-persistent -n openshift | oc create -f -< / span >
< / code > < / pre >
< p > 等 待 部 署 完 成 。 你 可 以 通 过 UI或 者 命 令 行 观 察 部 署 进 度 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc get pods< / span >
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NAME READY STATUS RESTARTS AGE
mysql-1-h4afb 1/1 Running 0 2m
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< / code > < / pre >
< p > 好 了 。 我 们 已 经 使 用 这 个 模 板 创 建 了 一 个 service， secrets、 PVC和 pod。 我 们 来 使 用 它 （ 你 的 pod名 字 将 跟 我 的 不 同 ） ： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc rsh mysql-1-h4afb< / span >
< / code > < / pre >
< p > 你 已 经 成 功 的 将 它 挂 载 到 MySQL的 pod上 。 我 们 连 接 一 下 数 据 库 试 试 ： < / p >
< pre > < code class = "lang-bash" > sh-4.2$ mysql -u < span class = "hljs-variable" > $MYSQL_USER< / span > -p< span class = "hljs-variable" > $MYSQL_PASSWORD< / span > -h < span class = "hljs-variable" > $HOSTNAME< / span > < span class = "hljs-variable" > $MYSQL_DATABASE< / span >
< / code > < / pre >
< p > 这 点 很 方 便 ， 所 有 重 要 的 配 置 ， 如 MySQL凭 据 ， 数 据 库 名 称 等 都 是 pod模 板 中 的 环 境 变 量 的 一 部 分 ， 因 此 可 以 在 pod中 作 为 shell的 环 境 变 量 。 我 们 来 创 建 一 些 数 据 ： < / p >
< pre > < code class = "lang-Bash" > mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| sampledb |
+--------------------+
2 rows < span class = "hljs-keyword" > in< / span > < span class = "hljs-built_in" > set< / span > (0.02 sec)
mysql> \u sampledb
Database changed
mysql> CREATE TABLE IF NOT EXISTS equipment (
-> equip_id int(5) NOT NULL AUTO_INCREMENT,
-> < span class = "hljs-built_in" > type< / span > varchar(50) DEFAULT NULL,
-> install_date DATE DEFAULT NULL,
-> color varchar(20) DEFAULT NULL,
-> working bool DEFAULT NULL,
-> location varchar(250) DEFAULT NULL,
-> PRIMARY KEY(equip_id)
-> );
Query OK, 0 rows affected (0.13 sec)
mysql> INSERT INTO equipment (< span class = "hljs-built_in" > type< / span > , install_date, color, working, location)
-> VALUES
-> (< span class = "hljs-string" > " Slide" < / span > , Now(), < span class = "hljs-string" > " blue" < / span > , 1, < span class = "hljs-string" > " Southwest Corner" < / span > );
Query OK, 1 row affected, 1 warning (0.01 sec)
mysql> SELECT * FROM equipment;
+----------+-------+--------------+-------+---------+------------------+
| equip_id | < span class = "hljs-built_in" > type< / span > | install_date | color | working | location |
+----------+-------+--------------+-------+---------+------------------+
| 1 | Slide | 2017-03-24 | blue | 1 | Southwest Corner |
+----------+-------+--------------+-------+---------+------------------+
1 row < span class = "hljs-keyword" > in< / span > < span class = "hljs-built_in" > set< / span > (0.00 sec)
< / code > < / pre >
< p > 很 好 ， 数 据 库 运 行 正 常 。 < / p >
< p > 你 想 看 下 数 据 存 储 在 哪 里 吗 ？ 很 简 单 ！ 查 看 刚 使 用 模 板 创 建 的 mysql volume： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # oc get pvc/mysql< / span >
NAME STATUS VOLUME CAPACITY ACCESSMODES AGE
mysql Bound pvc< span class = "hljs-_" > -a< / span > 678b583-1082-11e7-afae-000c2949cce7 1Gi RWO 11m
< span class = "hljs-comment" > # oc describe pv/pvc-a678b583-1082-11e7-afae-000c2949cce7< / span >
Name: pvc< span class = "hljs-_" > -a< / span > 678b583-1082-11e7-afae-000c2949cce7
Labels:
StorageClass: container-ready-storage
Status: Bound
Claim: crs-storage/mysql
Reclaim Policy: Delete
Access Modes: RWO
Capacity: 1Gi
Message:
Source:
Type: Glusterfs (a Glusterfs mount on the host that shares a pod< span class = "hljs-string" > ' s lifetime)
EndpointsName: gluster-dynamic-mysql
Path: vol_6299fc74eee513119dafd43f8a438db1
ReadOnly: false
< / span > < / code > < / pre >
< p > GlusterFS的 volume名 字 是 vol_6299fc74eee513119dafd43f8a438db1。 回 到 你 的 GlusterFS虚 拟 机 中 ， 输 入 ： < / p >
< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # gluster volume info vol_6299fc74eee513119dafd43f8a438db< / span >
Volume Name: vol_6299< span class = "hljs-built_in" > fc< / span > 74eee513119dafd43f8a438db1
Type: Replicate
Volume ID: 4115918f-28f7-4d4a-b3f5-4b9afe5b391f
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: 172.16.128.7:/var/lib/heketi/mounts/vg_67314f879686de975f9b8936ae43c5c5/brick_f264a47aa32be5d595f83477572becf8/brick
Brick2: 172.16.128.8:/var/lib/heketi/mounts/vg_147b43f6f6903be8b23209903b7172ae/brick_f5731fe7175cbe6e6567e013c2591343/brick
Brick3: 172.16.128.9:/var/lib/heketi/mounts/vg_72c0f520b0c57d807be21e9c90312f85/brick_ac6add804a6a467< span class = "hljs-built_in" > cd< / span > 81< span class = "hljs-built_in" > cd< / span > 1404841bbf1/brick
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
< / code > < / pre >
< p > 你 可 以 看 到 数 据 是 如 何 被 复 制 到 3个 GlusterFS块 的 。 我 们 从 中 挑 一 个 （ 最 好 挑 选 你 刚 登 陆 的 那 台 虚 拟 机 并 查 看 目 录 ） ： < / p >
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< pre > < code class = "lang-bash" > < span class = "hljs-comment" > # ll /var/lib/heketi/mounts/vg_67314f879686de975f9b8936ae43c5c5/brick_f264a47aa32be5d595f83477572becf8/brick< / span >
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total 180300
-rw-r-----. 2 1000070000 2001 56 Mar 24 12:11 auto.cnf
-rw-------. 2 1000070000 2001 1676 Mar 24 12:11 ca-key.pem
-rw-r--r--. 2 1000070000 2001 1075 Mar 24 12:11 ca.pem
-rw-r--r--. 2 1000070000 2001 1079 Mar 24 12:12 client-cert.pem
-rw-------. 2 1000070000 2001 1680 Mar 24 12:12 client-key.pem
-rw-r-----. 2 1000070000 2001 352 Mar 24 12:12 ib_buffer_pool
-rw-r-----. 2 1000070000 2001 12582912 Mar 24 12:20 ibdata1
-rw-r-----. 2 1000070000 2001 79691776 Mar 24 12:20 ib_logfile0
-rw-r-----. 2 1000070000 2001 79691776 Mar 24 12:11 ib_logfile1
-rw-r-----. 2 1000070000 2001 12582912 Mar 24 12:12 ibtmp1
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drwxr< span class = "hljs-_" > -s< / span > ---. 2 1000070000 2001 8192 Mar 24 12:12 mysql
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-rw-r-----. 2 1000070000 2001 2 Mar 24 12:12 mysql-1-h4afb.pid
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drwxr< span class = "hljs-_" > -s< / span > ---. 2 1000070000 2001 8192 Mar 24 12:12 performance_schema
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-rw-------. 2 1000070000 2001 1676 Mar 24 12:12 private_key.pem
-rw-r--r--. 2 1000070000 2001 452 Mar 24 12:12 public_key.pem
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drwxr< span class = "hljs-_" > -s< / span > ---. 2 1000070000 2001 62 Mar 24 12:20 sampledb
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-rw-r--r--. 2 1000070000 2001 1079 Mar 24 12:11 server-cert.pem
-rw-------. 2 1000070000 2001 1676 Mar 24 12:11 server-key.pem
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drwxr< span class = "hljs-_" > -s< / span > ---. 2 1000070000 2001 8192 Mar 24 12:12 sys
< / code > < / pre >
< p > 你 可 以 在 这 里 看 到 MySQL数 据 库 目 录 。 它 使 用 GlusterFS作 为 后 端 存 储 ， 并 作 为 绑 定 挂 载 给 MySQL容 器 使 用 。 如 果 你 检 查 OpenShift VM上 的 mount表 ， 你 将 会 看 到 GlusterFS的 mount。 < / p >
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< h3 id = "总结" > 总 结 < / h3 >
< p > 在 这 里 我 们 是 在 OpenShift之 外 创 建 了 一 个 简 单 但 功 能 强 大 的 GlusterFS存 储 池 。 该 池 可 以 独 立 于 应 用 程 序 扩 展 和 收 缩 。 该 池 的 整 个 生 命 周 期 由 一 个 简 单 的 称 为 heketi的 前 端 管 理 ， 你 只 需 要 在 部 署 增 长 时 进 行 手 动 干 预 。 对 于 日 常 配 置 操 作 ， 使 用 它 的 API与 OpenShifts动 态 配 置 器 交 互 ， 无 需 开 发 人 员 直 接 与 基 础 架 构 团 队 进 行 交 互 。 < / p >
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< p > o这 就 是 我 们 如 何 将 存 储 带 入 DevOps世 界 - 无 痛 苦 ， 并 在 OpenShift PaaS系 统 的 开 发 人 员 工 具 中 直 接 提 供 。 < / p >
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< p > GlusterFS和 OpenShift可 跨 越 所 有 环 境 ： 裸 机 ， 虚 拟 机 ， 私 有 和 公 共 云 （ Azure， Google Cloud， AWS ...） ， 确 保 应 用 程 序 可 移 植 性 ， 并 避 免 云 供 应 商 锁 定 。 < / p >
< p > 祝 你 愉 快 在 容 器 中 使 用 GlusterFS！ < / p >
< p > (c) 2017 Keith Tenzer< / p >
< p > 原 文 链 接 ： < a href = "https://keithtenzer.com/2017/03/24/storage-for-containers-using-gluster-part-ii/" target = "_blank" > https://keithtenzer.com/2017/03/24/storage-for-containers-using-gluster-part-ii/< / a > < / p >
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