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关于K8S集群一致性认证

CNCF 一致性认证项目(https://github.com/cncf/k8s-conformance) 可以很方便帮助k8s搭建者和用户确认集群各项功能符合预期，既符合k8s设计标准。

kubeasz 通过一致性测试

自kubeasz 3.0.0 版本，k8s v1.20.2开始，正式通过cncf一致性认证，成为cncf 官方认证安装工具；后续k8s主要版本发布或者kubeasz有大版本更新，会优先确保通过集群一致性认证。

v1.27 进行中
v1.26 已认证
v1.25 已认证
v1.24 已认证
v1.23 已认证
v1.22 已认证
v1.21 已认证
v1.20 已认证

Conformance Test

按照测试文档，注意以下几点：

1.解决qiang的问题，可以临时去国外公有云创建集群，然后运行测试项目。

2.集群要保障资源，建议3个节点

3.网络组件选择calico，其他组件可能有bug导致特定测试项失败

附：测试流程

Node Provisioning

Provision 3 nodes for your cluster (OS: Ubuntu 20.04)

1 master node (4c16g)

2 worker node (4c16g)

for a High-Availability Kubernetes Cluster, read more

Install the cluster

(1) Download 'kubeasz' code, the binaries and offline images

export release=3.2.0
curl -C- -fLO --retry 3 https://github.com/easzlab/kubeasz/releases/download/${release}/ezdown
chmod +x ./ezdown
./ezdown -D -m standard

(2) install an all-in-one cluster

./ezdown -S
source ~/.bashrc
dk ezctl start-aio

(3) Add two worker nodes

ssh-copy-id ${worker1_ip}
dk ezctl add-node default ${worker1_ip}

ssh-copy-id ${worker2_ip}
dk ezctl add-node default ${worker2_ip}

Run Conformance Test

The standard tool for running these tests is Sonobuoy. Sonobuoy is regularly built and kept up to date to execute against all currently supported versions of kubernetes.

Download a binary release of the CLI

Deploy a Sonobuoy pod to your cluster with:

$ sonobuoy run --plugin-env=e2e.E2E_EXTRA_ARGS="--ginkgo.v" --mode=certified-conformance

NOTE: You can run the command synchronously by adding the flag --wait but be aware that running the Conformance tests can take an hour or more.

View actively running pods:

$ sonobuoy status

To inspect the logs:

$ sonobuoy logs

Once sonobuoy status shows the run as completed, copy the output directory from the main Sonobuoy pod to a local directory:

$ outfile=$(sonobuoy retrieve)

This copies a single .tar.gz snapshot from the Sonobuoy pod into your local . directory. Extract the contents into ./results with:

mkdir ./results; tar xzf $outfile -C ./results

NOTE: The two files required for submission are located in the tarball under plugins/e2e/results/{e2e.log,junit.xml}.

To clean up Kubernetes objects created by Sonobuoy, run:

sonobuoy delete

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