更新文档mariadb_cluster.md

docs/practice/mariadb_cluster.md

@@ -1,3 +1,103 @@
-# mariadb 数据库集群
+# Mariadb 数据库集群
+
+Mariadb 是从 MySQL 衍生出来的开源关系型数据库，目前兼容 mysql 5.7 版本；它也非常流行，拥有 Google Facebook 等重要企业用户。本文档介绍使用 helm charts 方式安装 mariadb cluster，仅供实践交流使用。
+
+## 前提条件
+
+- 已部署 k8s 集群，参考[这里](../setup/quickStart.md)
+- 已部署 helm，参考[这里](../guide/helm.md)
+- 集群提供持久性存储，参考[这里](../setup/08-cluster-storage.md)
+
+这里演示使用 nfs 动态存储，编辑修改 nfs 存储部分参数
+
+``` bash
+$ vi roles/cluster-storage/defaults/main.yml
+storage:
+  # nfs server 参数
+  nfs:
+    enabled: "yes"              # 启用 nfs
+    server: "172.16.3.86"       # 设置 nfs 服务器地址
+    server_path: "/data/nfs"    # 设置共享目录
+    storage_class: "nfs-db"     # 定义 storage_class，后面pvc要调用这个 
+    provisioner_name: "nfs-provisioner-01"  # 任意命名
+
+# 配置完成，保存退出，运行下面命令
+$ ansible-playbook /etc/ansible/roles/cluster-storage/cluster-storage.yml
+# 确认nfs provisioner pod
+$ kubectl get pod --all-namespaces |grep nfs
+kube-system   nfs-provisioner-01-88694d78c-mrn7f            1/1     Running   0          6m
+```
+
+## mariadb charts 配置修改
+
+按照惯例，直接把 chart 下载到本地，然后把配置复制 values.yaml 出来进行修改，这样方便以后整体更新 chart，安装实际使用需要修改配置文件
+
+``` bash
+$ cd /etc/ansible/manifests/mariadb-cluster
+# 编辑 my-values.yaml 修改以下部分
+
+service:
+  type: NodePort     # 方便集群外部访问
+  port: 3306
+  nodePort:
+    master: 33306    # 设置主库的nodePort
+    slave: 33307     # 设置从库的nodePort
+
+rootUser:            # 设置 root 密码
+  password: test.c0m
+  forcePassword: true
+
+db:                  # 设置初始测试数据库
+  user: hello
+  password: hello
+  name: hello
+  forcePassword: true
+
+replication:         # 设置主从复制
+  enabled: true
+  user: replicator
+  password: R4%forep11CAT0r
+  forcePassword: true
+
+master:
+  affinity: {}
+  antiAffinity: soft
+  tolerations: []
+  persistence:
+    enabled: true    # 启用持久化存储
+    mountPath: /bitnami/mariadb
+    storageClass: "nfs-db"  # 设置使用 nfs-db 存储类
+    annotations: {}
+    accessModes:
+    - ReadWriteOnce
+    size: 5Gi        # 设置存储容量 
+
+slave:
+  replicas: 1
+  affinity: {}
+  antiAffinity: soft
+  tolerations: []
+  persistence:
+    enabled: false   # 从库这里没有启用持久性存储
+```
+
+## 安装
+
+使用 helm 安装
+
+``` bash
+$ cd /etc/ansible/manifests/mariadb-cluster
+$ helm install --name mariadb --namespace default -f my-values.yaml ./mariadb
+```
+
+## 验证
+
+``` bash
+$ kubectl get pod,svc | grep mariadb
+pod/mariadb-mariadb-master-0      1/1     Running   0          27m
+pod/mariadb-mariadb-slave-0       1/1     Running   0          29m
+
+service/mariadb                       NodePort    10.68.170.168   <none>        3306:33306/TCP       29m
+service/mariadb-mariadb-slave         NodePort    10.68.151.95    <none>        3306:33307/TCP       29m
+```
 
-待更新...

manifests/mariadb-cluster/my-values.yaml

@@ -185,12 +185,28 @@ master:
     port=3306
     socket=/opt/bitnami/mariadb/tmp/mysql.sock
     tmpdir=/opt/bitnami/mariadb/tmp
-    max_allowed_packet=16M
     bind-address=0.0.0.0
     pid-file=/opt/bitnami/mariadb/tmp/mysqld.pid
     log-error=/opt/bitnami/mariadb/logs/mysqld.log
     character-set-server=UTF8
     collation-server=utf8_general_ci
+    # optimize
+    max_allowed_packet = 1024M
+    table_open_cache = 512
+    sort_buffer_size = 2M
+    read_buffer_size = 2M
+    read_rnd_buffer_size = 8M
+    thread_cache_size = 8
+    query_cache_size = 32M
+    max_heap_table_size=1024M
+    tmp_table_size=1024M
+    max_connections=65535
+    max_connect_errors=65535
+    wait_timeout=172800
+    interactive_timeout=172800
+    connect_timeout=30
+    # log settings
+    expire_logs_days=3
 
     [client]
     port=3306
@@ -280,12 +296,28 @@ slave:
     port=3306
     socket=/opt/bitnami/mariadb/tmp/mysql.sock
     tmpdir=/opt/bitnami/mariadb/tmp
-    max_allowed_packet=16M
     bind-address=0.0.0.0
     pid-file=/opt/bitnami/mariadb/tmp/mysqld.pid
     log-error=/opt/bitnami/mariadb/logs/mysqld.log
     character-set-server=UTF8
     collation-server=utf8_general_ci
+    # optimize
+    max_allowed_packet = 1024M
+    table_open_cache = 512
+    sort_buffer_size = 2M
+    read_buffer_size = 2M
+    read_rnd_buffer_size = 8M
+    thread_cache_size = 8
+    query_cache_size = 32M
+    max_heap_table_size=1024M
+    tmp_table_size=1024M
+    max_connections=65535
+    max_connect_errors=65535
+    wait_timeout=172800
+    interactive_timeout=172800
+    connect_timeout=30
+    # log settings
+    expire_logs_days=3
 
     [client]
     port=3306