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admission-webhook-example

admission-webhook-example

系统: ubuntu

部署流程：

  1. 构建镜像 nerdctl build -t hysyeah/pod-webhook:v3 . 如果使用的容器运行时是docker可以使用下面的命令构建镜像 docker build -t hysyeah/pod-webhook:v3 .

  2. 配置生成证书 2.1 拷贝/etc/kubernetes/pki/ca.crt,ca.key到./pki目录下(k3s /var/lib/rancher/k3s/server/tls) 2.2 运行gen-certs.sh(会生成对应的证书和创建secret)

  3. 部署Deployment或者直接部署二进制文件 kubectl apply -f deployment.yaml

或者直接运行服务(保证apiserver在同一个网络(k3s的apiserver有可能是127.0.0.1:6443))，需要修改deployment.yaml中相应的字段，ValidatingWebhookConfiguration，MutatingWebhookConfiguration go run *.go -tls-cert-file=./pki/generated/pod-webhook.pem -tls-private-key-file=./pki/generated/pod-webhook-key.pem

  1. 测试验证
    4.1 新建一个pod,kubectl apply -f mycurl.yaml,查看pod的label,会发现增了<added-label=yes> my-curl 1/1 Running 0 6s added-label=yes,app=my-curl 4.2 新建configmap,kubectl apply -f configmap.yaml
  • 安装cfssl, cfssljson
wget -q --show-progress --https-only --timestamping \
  https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 \
  https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 sudo mv cfssl_linux-amd64 /usr/local/bin/cfssl sudo mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

  • 安装nerdctl wget https://github.com/containerd/nerdctl/releases/download/v1.7.5/nerdctl-full-1.7.5-linux-amd64.tar.gz tar -xzvf nerdctl-full-1.7.5-linux-amd64.tar.gz sudo cp bin/nerdctl /usr/local/bin sudo cp bin/buildkitd /usr/local/bin
# 启动buildkitd
buildkitd