{"id":11595,"date":"2025-07-26T11:17:16","date_gmt":"2025-07-26T03:17:16","guid":{"rendered":"https:\/\/egonlin.com\/?p=11595"},"modified":"2025-07-26T11:17:16","modified_gmt":"2025-07-26T03:17:16","slug":"k8s%e9%9b%86%e7%be%a4%e8%af%81%e4%b9%a6%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=11595","title":{"rendered":"k8s\u96c6\u7fa4\u8bc1\u4e66\u7ba1\u7406"},"content":{"rendered":"

k8s\u5185\u7684\u4e3b\u8282\u70b9\u4e0e\u5de5\u4f5c\u8282\u70b9\u7ec4\u4ef6\u901a\u4fe1\u4f9d\u8d56ssl\u8bc1\u4e66\u8fdb\u884c\u52a0\u5bc6\u901a\u4fe1\uff0c\u800c\u8bc1\u4e66\u662f\u4f1a\u8fc7\u671f\u7684<\/p>\n

1\u3001\u624b\u52a8\u7eed\u7b7e\u8bc1\u4e66\uff1ahttps:\/\/egonlin.com\/?p=11593<\/p>\n

 <\/p>\n

2\u3001\u81ea\u52a8\u7eed\u7b7e\u8bc1\u4e66\uff1a\u9700\u9488\u5bf9\u4e0d\u540c\u7ec4\u4ef6\u91c7\u7528\u4e0d\u540c\u7b56\u7565<\/p>\n

\u4e3b\u8282\u70b9\uff08\u63a7\u5236\u5e73\u9762\uff09\u8bc1\u4e66\u81ea\u52a8\u66f4\u65b0\uff1a\u63a8\u8350<\/strong>\u4f7f\u7528 Cert-Manager + \u81ea\u7b7e\u540d CA<\/strong><\/span><\/p>\n

\u5de5\u4f5c\u8282\u70b9\uff08kubelet\uff09\u8bc1\u4e66\u81ea\u52a8\u66f4\u65b0\uff1a\u5de5\u4f5c\u8282\u70b9\u8bc1\u4e66\u901a\u8fc7 Kubernetes \u539f\u751f\u00a0TLS Bootstrapping \u673a\u5236\u5b9e\u73b0\u5168\u81ea\u52a8\u8f6e\u6362\uff08\u5df2\u9ed8\u8ba4\u5f00\u542f\uff09\uff0c\u65e0\u9700\u5916\u90e8\u5de5\u5177\u3002<\/strong><\/span><\/p>\n

kubeadm\u90e8\u7f72\u4f1a\u81ea\u52a8\u521b\u5efa\u81ea\u7b7e\u540dCA\uff0c\u9ed8\u8ba4 \u9ed8\u8ba4\u6709\u6548\u671f 10 \u5e74<\/strong>\uff0c\u9700\u624b\u52a8\u66f4\u65b0\uff08\u9ad8\u98ce\u9669\u64cd\u4f5c\uff09<\/span><\/p>\n

 \u9488\u5bf9\u7528\u6237\u7684\u73af\u5883\uff08Kubernetes 1.22.2\uff09\uff0c\u6211\u81ea\u52a8\u5316\u65b9\u6848\uff1a\r\n \u4e00\u3001\u63a7\u5236\u5e73\u9762\u8bc1\u4e66\u81ea\u52a8\u5316\u7eed\u671f\uff08\u4f7f\u7528cert-manager\uff09\r\n \u6b65\u9aa4\uff1a\r\n 1. \u5b89\u88c5cert-manager\uff08\u4f7f\u7528Helm\u6216YAML\uff09\r\n 2. \u521b\u5efa\u81ea\u7b7e\u540dCA\uff08\u6216\u4f7f\u7528\u73b0\u6709CA\uff09\u5e76\u5b58\u50a8\u4e3aSecret\r\n 3. \u521b\u5efaClusterIssuer\u5f15\u7528\u8be5CA\r\n 4. \u4e3a\u6bcf\u4e2a\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\uff08apiserver, etcd, controller-manager, scheduler\u7b49\uff09\u521b\u5efaCertificate\u8d44\u6e90\r\n 5. \u4fee\u6539\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u7684\u9759\u6001Pod\u5b9a\u4e49\uff0c\u4f7f\u5176\u4f7f\u7528cert-manager\u7ba1\u7406\u7684\u8bc1\u4e66\uff08\u4eceSecret\u6302\u8f7d\uff09\uff0c\u5e76\u542f\u7528\u8bc1\u4e66\u70ed\u52a0\u8f7d\uff08\u5982\u679c\u7ec4\u4ef6\u652f\u6301\uff09\r\n 6. \u91cd\u542f\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\uff08\u4e00\u6b21\u6027\u7684\uff0c\u4e4b\u540e\u7531cert-manager\u81ea\u52a8\u7eed\u671f\uff09\r\n \u4e8c\u3001\u5de5\u4f5c\u8282\u70b9\u8bc1\u4e66\u81ea\u52a8\u5316\u7eed\u671f\r\n \u5de5\u4f5c\u8282\u70b9\u7684kubelet\u8bc1\u4e66\u901a\u8fc7TLS Bootstrapping\u81ea\u52a8\u8f6e\u6362\uff0c\u4f46\u9700\u8981\u786e\u4fdd\uff1a\r\n 1. kubelet\u914d\u7f6e\u4e86`--rotate-certificates=true`\uff08\u9ed8\u8ba4\u5f00\u542f\uff09\u8be6\u89e3\u5de5\u4f5c\u8282\u70b9\u7684\/var\/lib\/kubelet\/config.yaml\u4e2d\u7684\u914d\u7f6e\u9879rotateCertificates\u4e3atrue\r\n 2. controller-manager\u914d\u7f6e\u4e86\u81ea\u52a8\u6279\u51c6CSR\uff08\u9ed8\u8ba4\u5f00\u542f\uff09\r\n 3. \u786e\u4fddRBAC\u6388\u6743\u6b63\u786e\uff08\u9ed8\u8ba4\u5df2\u8bbe\u7f6e\uff09\r\n \u4e09\u3001CA\u6839\u8bc1\u4e66\u7684\u8003\u8651\r\n \u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u7684\u6839\u8bc1\u4e66\uff08ca.crt\uff09\u9ed8\u8ba410\u5e74\uff0c\u4f46\u82e5\u9700\u8981\u66f4\u65b0\uff0c\u5219\u9700\u8981\u624b\u52a8\u64cd\u4f5c\uff08\u98ce\u9669\u9ad8\uff09\u3002\u5efa\u8bae\u5728\u521d\u59cb\u5316\u96c6\u7fa4\u65f6\u4f7f\u7528\u957f\u671f\u6709\u6548\u7684CA\uff0c\u6216\u8005\u5b9a\u671f\uff08\u6bd4\u5982\u6bcf8\u5e74\uff09\u66f4\u65b0CA\u5e76\u91cd\u65b0\u7b7e\u6240\u6709\u8bc1\u4e66\uff0c\u4e0d\u8fc7\u6709\u51e0\u4e2a\u4eba\u80fd\u5728\u4e00\u5bb6\u516c\u53f8\u5e72\u6ee110\u5e74\u5462\uff0c\u6216\u8005\u8bf4\u540c\u4e00\u4e2a\u9879\u76ee\u8c01\u80fd\u7ef4\u62a410\u5e74\u5462\u54c8\u54c8\u54c8\u3002\r\n \u56db\u3001\u76d1\u63a7\u4e0e\u544a\u8b66\r\n \u90e8\u7f72\u76d1\u63a7\uff0c\u5bf9\u8bc1\u4e66\u8fc7\u671f\u65f6\u95f4\u8fdb\u884c\u544a\u8b66\uff08\u5982\u4f7f\u7528Prometheus\u76d1\u63a7cert-manager\u7684\u6307\u6807\uff0c\u6216\u5b9a\u671f\u68c0\u67e5\u8bc1\u4e66\u8fc7\u671f\u65f6\u95f4\uff09\u3002\r\n \u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4\uff08\u9488\u5bf9\u63a7\u5236\u5e73\u9762\uff09\uff1a\r\n 1. \u5b89\u88c5cert-manager\r\n   \u7531\u4e8e\u662f\u79bb\u7ebf\u73af\u5883\uff1f\u8fd9\u91cc\u5047\u8bbe\u6709\u7f51\u7edc\uff08\u5982\u679c\u6ca1\u6709\uff0c\u9700\u8981\u5148\u4e0b\u8f7d\u955c\u50cf\uff09\r\n   \u4f7f\u7528Helm\u5b89\u88c5\uff1a\r\n   ```\r\n   helm repo add jetstack https:\/\/charts.jetstack.io\r\n   helm repo update\r\n   helm install cert-manager jetstack\/cert-manager --namespace cert-manager --create-namespace --version v1.13.1 --set installCRDs=true\r\n   ```\r\n 2. \u521b\u5efa\u81ea\u7b7e\u540dCA\uff08\u5982\u679c\u96c6\u7fa4\u73b0\u6709\u7684CA\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528\uff0c\u5219\u8df3\u8fc7\u521b\u5efa\uff0c\u76f4\u63a5\u521b\u5efaSecret\uff09\r\n   \u751f\u6210CA\uff08\u5728master\u8282\u70b9\u4e0a\uff09\uff1a\r\n   ```\r\n   openssl genrsa -out ca.key 2048\r\n   openssl req -x509 -new -nodes -key ca.key -subj \"\/CN=Kubernetes\" -days 3650 -out ca.crt\r\n\r\n   \u67e5\u770b\r\n   openssl x509 -in \/etc\/kubernets\/pki\/ca.crt -noout -text |grep Not\r\n   ```\r\n   \u521b\u5efaSecret\uff08\u5728kube-system\u547d\u540d\u7a7a\u95f4\uff09\uff1a\r\n   ```\r\n   kubectl create secret tls k8s-root-ca --cert=ca.crt --key=ca.key -n kube-system\r\n   ```\r\n 3. \u521b\u5efaClusterIssuer\r\n   ```yaml\r\n   apiVersion: cert-manager.io\/v1\r\n   kind: ClusterIssuer\r\n   metadata:\r\n     name: k8s-root-issuer\r\n     namespace: kube-system\r\n   spec:\r\n     ca:\r\n       secretName: k8s-root-ca\r\n   ```\r\n 4. \u4e3a\u6bcf\u4e2a\u7ec4\u4ef6\u521b\u5efaCertificate\u8d44\u6e90\uff08\u4ee5apiserver\u4e3a\u4f8b\uff09\r\n   ```yaml\r\n   apiVersion: cert-manager.io\/v1\r\n   kind: Certificate\r\n   metadata:\r\n     name: kube-apiserver\r\n     namespace: kube-system\r\n   spec:\r\n     secretName: kube-apiserver-tls   # \u8fd9\u4e2aSecret\u540d\u79f0\u9700\u8981\u4e0eapiserver\u542f\u52a8\u53c2\u6570\u4e2d\u6307\u5b9a\u7684\u8bc1\u4e66\u4e00\u81f4\r\n     duration: 8760h   # 1\u5e74\r\n     renewBefore: 720h  # \u63d0\u524d30\u5929\u7eed\u671f\r\n     issuerRef:\r\n       name: k8s-root-issuer\r\n       kind: ClusterIssuer\r\n     commonName: kube-apiserver\r\n     usages:\r\n       - server auth\r\n       - client auth\r\n     dnsNames:\r\n       - kubernetes\r\n       - kubernetes.default\r\n       - kubernetes.default.svc\r\n       - kubernetes.default.svc.cluster.local\r\n       - localhost\r\n       # \u6dfb\u52a0\u5176\u4ed6DNS\u540d\u79f0\uff08\u5982master\u8282\u70b9\u7684\u4e3b\u673a\u540d\u3001\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u57df\u540d\u7b49\uff09\r\n     ipAddresses:\r\n       - 127.0.0.1\r\n       - 10.96.0.1   # ClusterIP of kubernetes service\r\n       # \u6dfb\u52a0master\u8282\u70b9\u7684IP\u5730\u5740\r\n       - 192.168.110.128\r\n   ```\r\n   \u6ce8\u610f\uff1a\u9700\u8981\u4e3aetcd\u3001controller-manager\u3001scheduler\u7b49\u521b\u5efa\u7c7b\u4f3c\u7684Certificate\u8d44\u6e90\u3002\r\n 5. \u4fee\u6539\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u7684\u9759\u6001Pod\u5b9a\u4e49\uff08\u4ee5apiserver\u4e3a\u4f8b\uff09\r\n   \u6587\u4ef6\u4f4d\u7f6e\uff1a\/etc\/kubernetes\/manifests\/kube-apiserver.yaml\r\n   \u4fee\u6539\u5185\u5bb9\uff1a\r\n   - \u5c06`--tls-cert-file`\u548c`--tls-private-key-file`\u6307\u5411\u65b0\u8bc1\u4e66\uff08\u4eceSecret\u6302\u8f7d\u7684\u8def\u5f84\uff09\r\n   - \u6dfb\u52a0volume\u6302\u8f7d\uff08\u5c06Secret\u6302\u8f7d\u5230\u5bb9\u5668\u5185\uff09\r\n   \u793a\u4f8b\uff1a\r\n   ```yaml\r\n   spec:\r\n     containers:\r\n     - command:\r\n       - kube-apiserver\r\n       - --tls-cert-file=\/etc\/kubernetes\/secrets\/kube-apiserver-tls\/tls.crt\r\n       - --tls-private-key-file=\/etc\/kubernetes\/secrets\/kube-apiserver-tls\/tls.key\r\n       # ... \u5176\u4ed6\u53c2\u6570\u4fdd\u6301\u4e0d\u53d8\r\n       volumeMounts:\r\n       - name: apiserver-tls\r\n         mountPath: \/etc\/kubernetes\/secrets\/kube-apiserver-tls\r\n         readOnly: true\r\n     volumes:\r\n     - name: apiserver-tls\r\n       secret:\r\n         secretName: kube-apiserver-tls\r\n   ```\r\n   \u6ce8\u610f\uff1a\u4fee\u6539\u540e\uff0ckubelet\u4f1a\u81ea\u52a8\u91cd\u542fapiserver\u7684Pod\u3002\r\n 6. \u91cd\u542f\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\uff08\u5982\u679c\u4e0d\u786e\u5b9a\u662f\u5426\u652f\u6301\u70ed\u52a0\u8f7d\uff0c\u53ef\u4ee5\u91cd\u542f\uff09\r\n   \u5b9e\u9645\u4e0a\uff0c\u4fee\u6539\u9759\u6001Pod\u5b9a\u4e49\u540e\uff0ckubelet\u4f1a\u81ea\u52a8\u91cd\u542f\u5bf9\u5e94\u7684Pod\u3002\r\n 7. \u6ce8\u610f\uff1a\u5176\u4ed6\u7ec4\u4ef6\uff08etcd, controller-manager, scheduler\uff09\u4e5f\u9700\u8981\u505a\u7c7b\u4f3c\u7684\u4fee\u6539\u3002\r\n 8. \u5bf9\u4e8ekubelet.conf\u7b49kubeconfig\u6587\u4ef6\uff0c\u4e0d\u9700\u8981\u518d\u624b\u52a8\u66f4\u65b0\uff0c\u56e0\u4e3a\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u5df2\u7ecf\u4f7f\u7528\u4e86\u65b0\u8bc1\u4e66\uff0c\u4e14kubeconfig\u4e2d\u7684\u8bc1\u4e66\u662f\u7531\u540c\u4e00\u4e2aCA\u7b7e\u53d1\u7684\uff0c\u6240\u4ee5\u4fe1\u4efb\u94fe\u4e00\u81f4\u3002\r\n \u4e94\u3001\u5de5\u4f5c\u8282\u70b9\uff1a\r\n   \u65e0\u9700\u989d\u5916\u64cd\u4f5c\uff0c\u53ea\u8981\u786e\u4fddkubelet\u7684\u914d\u7f6e\u6b63\u786e\uff08\u81ea\u52a8\u8f6e\u6362\u5f00\u542f\uff09\uff0c\u5e76\u4e14controller-manager\u80fd\u591f\u81ea\u52a8\u6279\u51c6CSR\u3002\r\n \u516d\u3001\u76d1\u63a7\uff1a\r\n   \u4f7f\u7528cert-manager\u81ea\u5e26\u7684Prometheus\u6307\u6807\u8fdb\u884c\u76d1\u63a7\uff0c\u5e76\u8bbe\u7f6e\u544a\u8b66\u89c4\u5219\uff0c\u4f8b\u5982\uff1a\r\n   ```\r\n   # \u8bc1\u4e66\u572830\u5929\u5185\u8fc7\u671f\r\n   certmanager_certificate_expiration_timestamp_seconds - time() < 86400 * 30\r\n   ```\r\n \u4e03\u3001\u6ce8\u610f\u4e8b\u9879\uff1a\r\n   - \u5728\u8fc1\u79fb\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u786e\u4fdd\u96c6\u7fa4\u5904\u4e8e\u53ef\u7ef4\u62a4\u72b6\u6001\uff08\u53ef\u80fd\u77ed\u6682\u4e0d\u53ef\u7528\uff09\u3002\r\n   - \u5907\u4efd\u539f\u6709\u7684\u8bc1\u4e66\u548c\u914d\u7f6e\u6587\u4ef6\u3002\r\n   - \u7531\u4e8e\u7528\u6237\u96c6\u7fa4\u7248\u672c\u4e3a1.22.2\uff0c\u6ce8\u610fcert-manager\u7684\u7248\u672c\u517c\u5bb9\u6027\uff08cert-manager v1.13.1\u652f\u6301Kubernetes 1.22+\uff09\u3002\r\n \u516b\u3001\u5173\u4e8eCA\u6839\u8bc1\u4e66\u7684\u957f\u671f\u7ba1\u7406\uff1a\r\n   - \u5982\u679c\u4f7f\u7528\u81ea\u7b7e\u540dCA\uff0c\u5efa\u8bae\u8bbe\u7f6e\u8f83\u957f\u7684\u6709\u6548\u671f\uff08\u4f8b\u598210\u5e74\uff09\uff0c\u5e76\u5b9a\u671f\u68c0\u67e5CA\u7684\u8fc7\u671f\u65f6\u95f4\u3002\r\n   - \u66f4\u65b0CA\u6839\u8bc1\u4e66\u662f\u4e00\u4e2a\u590d\u6742\u4e14\u5371\u9669\u7684\u64cd\u4f5c\uff0c\u9700\u8981\u8c28\u614e\u3002\r\n \u603b\u7ed3\uff1a\u901a\u8fc7\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u63a7\u5236\u5e73\u9762\u8bc1\u4e66\u5c06\u7531cert-manager\u81ea\u52a8\u7eed\u671f\uff0c\u5de5\u4f5c\u8282\u70b9\u8bc1\u4e66\u7531Kubernetes\u539f\u751f\u673a\u5236\u81ea\u52a8\u7eed\u671f\uff0c\u4ece\u800c\u5b9e\u73b0\u5168\u96c6\u7fa4\u8bc1\u4e66\u7684\u81ea\u52a8\u5316\u7ba1\u7406\u3002\r\n<\/pre>\n
 <\/p>\n
\u4ee5\u4e0b\u662f\u5b8c\u6574\u7684\u81ea\u52a8\u5316\u89e3\u51b3\u65b9\u6848\uff0c\u53ef\u907f\u514d\u672a\u6765\u8bc1\u4e66\u8fc7\u671f\u5bfc\u81f4\u7684\u670d\u52a1\u4e2d\u65ad\uff1a<\/p>\n
\u81ea\u52a8\u5316\u8bc1\u4e66\u7ba1\u7406\u65b9\u6848\uff08\u57fa\u4e8e Kubernetes 1.22.2\uff09<\/h3>\n
\u4e00\u3001\u63a7\u5236\u5e73\u9762\u8bc1\u4e66\u81ea\u52a8\u5316\uff08Master \u8282\u70b9\uff09<\/h4>\n
\u6838\u5fc3\u5de5\u5177\uff1acert-manager + \u81ea\u7b7e\u540d CA<\/strong><\/p>\n
\n
# 1. \u5b89\u88c5 cert-manager\uff08v1.13.1 \u517c\u5bb9 Kubernetes 1.22\uff09<\/span>\r\nhelm repo add<\/span> jetstack https:\/\/charts.jetstack.io\r\nhelm install<\/span> cert-manager jetstack\/cert-manager \\<\/span>\r\n  --namespace<\/span> cert-manager \\<\/span>\r\n  --create-namespace \\<\/span>\r\n  --version<\/span> v1.13.1 \\<\/span>\r\n  --set<\/span> installCRDs<\/span>=<\/span>true\r\n\r\n# 2. \u521b\u5efa\u957f\u671f\u6709\u6548\u7684\u6839 CA\uff0810\u5e74\u6709\u6548\u671f\uff09<\/span>\r\nopenssl genrsa -out<\/span> ca.key 4096<\/span>\r\nopenssl req -x509<\/span> -new<\/span> -nodes<\/span> -key<\/span> ca.key \\<\/span>\r\n  -subj<\/span> \"\/CN=Kubernetes Internal CA\"<\/span> \\<\/span>\r\n  -days<\/span> 3650<\/span> -out<\/span> ca.crt\r\n\r\n# 3. \u521b\u5efa CA Secret<\/span>\r\nkubectl create secret tls k8s-root-ca \\<\/span>\r\n  --namespace<\/span>=<\/span>kube-system \\<\/span>\r\n  --cert<\/span>=<\/span>ca.crt \\<\/span>\r\n  --key<\/span>=<\/span>ca.key\r\n\r\n# 4. \u521b\u5efa ClusterIssuer<\/span>\r\ncat<\/span> <<<\/span>EOF |<\/span> kubectl apply -f<\/span> -<\/span>\r\napiVersion: cert-manager.io\/v1\r\nkind: ClusterIssuer\r\nmetadata:\r\n  name: k8s-root-issuer\r\n  namespace: kube-system\r\nspec:\r\n  ca:\r\n    secretName: k8s-root-ca\r\nEOF<\/span><\/pre>\n<\/div>\n
\u4e8c\u3001\u4e3a\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u914d\u7f6e\u81ea\u52a8\u7eed\u671f<\/h4>\n
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# 5. API Server \u8bc1\u4e66\u914d\u7f6e\uff08\u793a\u4f8b\uff09<\/span>\r\ncat <<EOF |<\/span> kubectl apply -<\/span>f -<\/span>\r\napiVersion<\/span>:<\/span> cert-<\/span>manager.io\/v1\r\nkind<\/span>:<\/span> Certificate\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> kube-<\/span>apiserver\r\n  namespace<\/span>:<\/span> kube-<\/span>system\r\nspec<\/span>:<\/span>\r\n  secretName<\/span>:<\/span> kube-<\/span>apiserver-<\/span>tls\r\n  duration<\/span>:<\/span> 8760h  # 1\u5e74<\/span>\r\n  renewBefore<\/span>:<\/span> 720h # \u63d0\u524d30\u5929\u7eed\u671f<\/span>\r\n  issuerRef<\/span>:<\/span>\r\n    name<\/span>:<\/span> k8s-<\/span>root-<\/span>issuer\r\n    kind<\/span>:<\/span> ClusterIssuer\r\n  commonName<\/span>:<\/span> kube-<\/span>apiserver\r\n  dnsNames<\/span>:<\/span>\r\n    -<\/span> kubernetes\r\n    -<\/span> kubernetes.default\r\n    -<\/span> kubernetes.default.svc\r\n    -<\/span> kubernetes.default.svc.cluster.local\r\n    -<\/span> localhost\r\n  ipAddresses<\/span>:<\/span>\r\n    -<\/span> 127.0.0.1\r\n    -<\/span> 10.96.0.1\r\n    -<\/span> 192.168.110.128  # Master IP<\/span>\r\n  organization<\/span>:<\/span>\r\n    -<\/span> system:<\/span>masters\r\n  usages<\/span>:<\/span>\r\n    -<\/span> server auth\r\n    -<\/span> client auth\r\nEOF<\/pre>\n<\/div>\n
\u4e09\u3001\u4fee\u6539\u63a7\u5236\u5e73\u9762\u7ec4\u4ef6\u914d\u7f6e<\/h4>\n
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# 6. \u4fee\u6539 API Server \u914d\u7f6e<\/span>\r\nsudo<\/span> vi<\/span> \/etc\/kubernetes\/manifests\/kube-apiserver.yaml<\/pre>\n<\/div>\n
\u6dfb\u52a0\u4ee5\u4e0b\u914d\u7f6e\uff1a<\/p>\n
\n
spec<\/span>:<\/span>\r\n  containers<\/span>:<\/span>\r\n  -<\/span> command<\/span>:<\/span>\r\n    -<\/span> kube-<\/span>apiserver\r\n    -<\/span> -<\/span>-<\/span>tls-<\/span>cert-<\/span>file=\/etc\/kubernetes\/secrets\/kube-<\/span>apiserver-<\/span>tls\/tls.crt\r\n    -<\/span> -<\/span>-<\/span>tls-<\/span>private-<\/span>key-<\/span>file=\/etc\/kubernetes\/secrets\/kube-<\/span>apiserver-<\/span>tls\/tls.key\r\n    -<\/span> -<\/span>-<\/span>feature-<\/span>gates=APIServerIdentity=true\r\n    -<\/span> -<\/span>-<\/span>tls-<\/span>cert-<\/span>file-<\/span>watch=true  # \u542f\u7528\u8bc1\u4e66\u76d1\u63a7<\/span>\r\n  volumeMounts<\/span>:<\/span>\r\n    -<\/span> name<\/span>:<\/span> apiserver-<\/span>tls\r\n      mountPath<\/span>:<\/span> \/etc\/kubernetes\/secrets\/kube-<\/span>apiserver-<\/span>tls\r\n  volumes<\/span>:<\/span>\r\n    -<\/span> name<\/span>:<\/span> apiserver-<\/span>tls\r\n      secret<\/span>:<\/span>\r\n        secretName<\/span>:<\/span> kube-<\/span>apiserver-<\/span>tls<\/pre>\n<\/div>\n
\u56db\u3001\u5de5\u4f5c\u8282\u70b9\u81ea\u52a8\u5316\uff08Worker \u8282\u70b9\uff09<\/h4>\n
\u6838\u5fc3\u673a\u5236\uff1a\u539f\u751f TLS Bootstrapping<\/strong><\/p>\n
\n
# 1. \u786e\u4fdd\u6240\u6709\u8282\u70b9 kubelet \u914d\u7f6e<\/span>\r\nsudo<\/span> vi<\/span> \/etc\/systemd\/system\/kubelet.service.d\/10-kubeadm.conf<\/pre>\n<\/div>\n
\u6dfb\u52a0\u53c2\u6570\uff1a<\/p>\n
\n
\n
\n
\n
ini<\/span><\/div>\n
\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
Environment<\/span>=<\/span>\"KUBELET_EXTRA_ARGS=--rotate-certificates=true --cert-dir=\/var\/lib\/kubelet\/pki<\/span>\"<\/span><\/pre>\n<\/div>\n
\n
\n
\n
\n
\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
# 2. \u914d\u7f6e Controller Manager \u81ea\u52a8\u5ba1\u6279<\/span>\r\nsudo<\/span> vi<\/span> \/etc\/kubernetes\/manifests\/kube-controller-manager.yaml<\/pre>\n<\/div>\n
\u6dfb\u52a0\u53c2\u6570\uff1a<\/p>\n
\n
\n
\n
\n
\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
spec<\/span>:<\/span>\r\n  containers<\/span>:<\/span>\r\n  -<\/span> command<\/span>:<\/span>\r\n    -<\/span> kube-<\/span>controller-<\/span>manager\r\n    -<\/span> -<\/span>-<\/span>cluster-<\/span>signing-<\/span>duration=87600h  # 10\u5e74\u6709\u6548\u671f<\/span>\r\n    -<\/span> -<\/span>-<\/span>controllers=*,<\/span>csrapprover\r\n    -<\/span> -<\/span>-<\/span>feature-<\/span>gates=RotateKubeletServerCertificate=true<\/pre>\n<\/div>\n
\u4e94\u3001\u76d1\u63a7\u4e0e\u544a\u8b66\u7cfb\u7edf<\/h4>\n
\n
# 1. \u521b\u5efa\u8bc1\u4e66\u8fc7\u671f\u544a\u8b66\uff08Prometheus\uff09<\/span>\r\ncat <<EOF |<\/span> kubectl apply -<\/span>f -<\/span>\r\napiVersion<\/span>:<\/span> monitoring.coreos.com\/v1\r\nkind<\/span>:<\/span> PrometheusRule\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> cert-<\/span>expiry-<\/span>alert\r\n  namespace<\/span>:<\/span> kube-<\/span>system\r\nspec<\/span>:<\/span>\r\n  groups<\/span>:<\/span>\r\n  -<\/span> name<\/span>:<\/span> cert-<\/span>expiry\r\n    rules<\/span>:<\/span>\r\n    -<\/span> alert<\/span>:<\/span> CertificateExpiringSoon\r\n      expr<\/span>:<\/span> (certmanager_certificate_expiration_timestamp_seconds -<\/span> time()) \/ 86400 < 30\r\n      for<\/span>:<\/span> 5m\r\n      labels<\/span>:<\/span>\r\n        severity<\/span>:<\/span> critical\r\n      annotations<\/span>:<\/span>\r\n        summary<\/span>:<\/span> \"\u8bc1\u4e66\u5373\u5c06\u8fc7\u671f ({{ $labels.name }})\"<\/span>\r\n        description<\/span>:<\/span> \"\u8bc1\u4e66 {{ $labels.name }} \u5c06\u5728 {{ printf \\\"%.0f\\\" ( (certmanager_certificate_expiration_timestamp_seconds - time()) \/ 86400 ) }} \u5929\u540e\u8fc7\u671f\"<\/span>\r\nEOF\r\n\r\n# 2. \u5b9a\u671f\u68c0\u67e5\u811a\u672c<\/span>\r\nsudo tee \/usr\/local\/bin\/check-<\/span>certs.sh <<'EOF'\r\n#!\/bin\/bash<\/span>\r\nkubeadm certs check-<\/span>expiration\r\nfind \/etc\/kubernetes\/pki -<\/span>type f -<\/span>name \"*.crt\"<\/span> -<\/span>print0 |<\/span> \r\n  xargs -<\/span>0 openssl x509 -<\/span>noout -<\/span>dates |<\/span>\r\n  awk -<\/span>F= '\/notAfter\/{<\/span>print \"\u8bc1\u4e66\u8fc7\u671f\u65f6\u95f4:<\/span>\",<\/span> $2}<\/span>'\r\nEOF\r\nsudo chmod +x \/usr\/local\/bin\/check-<\/span>certs.sh\r\n\r\n# 3. \u6dfb\u52a0\u5230 cronjob\uff08\u6bcf\u6708\u68c0\u67e5\uff09<\/span>\r\n(crontab -<\/span>l ; echo \"0 0 1 * * \/usr\/local\/bin\/check-<\/span>certs.sh |<\/span> mail -<\/span>s 'K8s\u8bc1\u4e66\u68c0\u67e5' admin@example.com\") |<\/span> crontab -<\/span><\/pre>\n<\/div>\n
\u516d\u3001\u707e\u5907\u4e0e\u6062\u590d\u65b9\u6848<\/h4>\n
\n
# 1. \u81ea\u52a8\u5907\u4efd\u8bc1\u4e66<\/span>\r\nsudo<\/span> tee<\/span> \/usr\/local\/bin\/backup-certs.sh <<<\/span>'EOF'\r\n#!\/bin\/bash\r\nBACKUP_DIR=\"\/backup\/certs\/$(date +%Y%m%d)\"\r\nmkdir -p $BACKUP_DIR\r\ncp -a \/etc\/kubernetes $BACKUP_DIR\r\ncp -a \/var\/lib\/kubelet\/pki $BACKUP_DIR\/kubelet-certs\r\ntar -czf $BACKUP_DIR.tar.gz $BACKUP_DIR\r\nfind \/backup -type f -mtime +30 -delete\r\nEOF<\/span>\r\nsudo<\/span> chmod<\/span> +x \/usr\/local\/bin\/backup-certs.sh\r\n\r\n# 2. \u6dfb\u52a0\u5230 cronjob\uff08\u6bcf\u5468\u5907\u4efd\uff09<\/span>\r\n(<\/span>crontab -l<\/span> ;<\/span> echo<\/span> \"0 3 * * 0 \/usr\/local\/bin\/backup-certs.sh\"<\/span>)<\/span> |<\/span> crontab<\/span> -\r\n\r\n# 3. Velero \u5907\u4efd\u5173\u952e Secrets<\/span>\r\nvelero backup create certs-backup --include-resources secrets --selector<\/span> cert-manager.io\/certificate-name<\/pre>\n<\/div>\n
\u65b9\u6848\u9a8c\u8bc1\u6d41\u7a0b<\/h3>\n
\n
# 1. \u5f3a\u5236\u89e6\u53d1\u7eed\u671f\u6d4b\u8bd5<\/span>\r\nkubectl patch certificate kube-apiserver -n<\/span> kube-system \\<\/span>\r\n  --type<\/span>=<\/span>'json'<\/span> -p<\/span>=<\/span>'[{\"op\": \"replace\", \"path\": \"\/spec\/renewBefore\", \"value\": \"5m\"}]'<\/span>\r\n\r\n# 2. \u89c2\u5bdf\u7eed\u671f\u8fc7\u7a0b<\/span>\r\nkubectl get certificates -n<\/span> kube-system -w<\/span>\r\nkubectl logs -f<\/span> -n<\/span> cert-manager deploy\/cert-manager\r\n\r\n# 3. \u9a8c\u8bc1\u65b0\u8bc1\u4e66\u52a0\u8f7d<\/span>\r\nopenssl s_client -connect<\/span> 127.0<\/span>.0.1:6443 -showcerts<\/span> 2<\/span>><\/span>\/dev\/null |<\/span> \r\n  openssl x509 -noout<\/span> -dates<\/span><\/pre>\n<\/div>\n
\u5173\u952e\u6ce8\u610f\u4e8b\u9879<\/h3>\n
    \n
  1. \n
    \u7248\u672c\u517c\u5bb9\u6027<\/strong><\/p>\n
      \n
    • \n
      cert-manager v1.13.x \u5b8c\u7f8e\u517c\u5bb9 Kubernetes 1.22<\/p>\n<\/li>\n
    • \n
      \u786e\u4fdd\u6240\u6709\u8282\u70b9\u65f6\u95f4\u540c\u6b65\uff08NTP \u670d\u52a1\uff09<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
    • \n
      \u591a\u4e3b\u8282\u70b9\u90e8\u7f72<\/strong><\/p>\n
      \n
      \n
      \n
      <\/div>\n<\/div>\n<\/div>\n
      # \u5728\u6240\u6709 Master \u8282\u70b9\u6267\u884c\u76f8\u540c\u914d\u7f6e<\/span>\r\nfor<\/span> node<\/span> in<\/span> k8scludes1 k8scludes2 k8scludes3;<\/span> do<\/span>\r\n  scp<\/span> \/etc\/kubernetes\/manifests\/*.yaml ${node}<\/span>:\/etc\/kubernetes\/manifests\/\r\n  ssh<\/span> ${node}<\/span> \"systemctl restart kubelet\"<\/span>\r\ndone<\/span><\/pre>\n<\/div>\n<\/li>\n
    • \n
      \u8bc1\u4e66\u8fc1\u79fb\u7b56\u7565<\/strong><\/p>\n
        \n
      • \n
        \u9996\u6b21\u914d\u7f6e\u5728\u7ef4\u62a4\u7a97\u53e3\u8fdb\u884c<\/p>\n<\/li>\n
      • \n
        \u4f7f\u7528\u00a0kubeadm certs renew all<\/code>\u00a0\u751f\u6210\u65b0\u8bc1\u4e66<\/p>\n<\/li>\n
      • \n
        \u9010\u6b65\u66ff\u6362\u4e3a cert-manager \u7ba1\u7406<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
      • \n
        \u5b89\u5168\u52a0\u56fa<\/strong><\/p>\n
        \n
        \n
        \n
        <\/div>\n<\/div>\n<\/div>\n
        # \u9650\u5236 CA Secret \u8bbf\u95ee<\/span>\r\nkubectl create rolebinding cert-manager-ca \\<\/span>\r\n  --role<\/span>=<\/span>cert-manager-ca-role \\<\/span>\r\n  --serviceaccount<\/span>=<\/span>kube-system:cert-manager \\<\/span>\r\n  --namespace<\/span>=<\/span>kube-system<\/pre>\n<\/div>\n<\/li>\n<\/ol>\n
        \n
        \u65b9\u6848\u4f18\u52bf<\/strong>\uff1a<\/p>\n
          \n
        • \n
          \u63a7\u5236\u5e73\u9762\u8bc1\u4e66\u5168\u81ea\u52a8\u7eed\u671f\uff08cert-manager\uff09<\/p>\n<\/li>\n
        • \n
          \u5de5\u4f5c\u8282\u70b9\u8bc1\u4e66\u81ea\u52a8\u8f6e\u6362\uff08\u539f\u751f TLS Bootstrapping\uff09<\/p>\n<\/li>\n
        • \n
          \u8fc7\u671f\u524d\u4e3b\u52a8\u544a\u8b66\uff08Prometheus\uff09<\/p>\n<\/li>\n
        • \n
          \u707e\u96be\u6062\u590d\u4fdd\u969c\uff08\u81ea\u52a8\u5907\u4efd + Velero\uff09<\/p>\n<\/li>\n
        • \n
          \u96f6\u624b\u52a8\u5e72\u9884\uff0c\u5f7b\u5e95\u907f\u514d\u8bc1\u4e66\u8fc7\u671f\u5bfc\u81f4\u7684\u96c6\u7fa4\u6545\u969c<\/p>\n<\/li>\n<\/ul>\n<\/blockquote>\n
           <\/p>\n
           <\/p>\n
           <\/p>\n","protected":false},"excerpt":{"rendered":"
          k8s\u5185\u7684\u4e3b\u8282\u70b9\u4e0e\u5de5\u4f5c\u8282\u70b9\u7ec4\u4ef6\u901a\u4fe1\u4f9d\u8d56ssl\u8bc1\u4e66\u8fdb\u884c\u52a0\u5bc6\u901a\u4fe1\uff0c\u800c\u8bc1\u4e66\u662f\u4f1a\u8fc7\u671f\u7684 1\u3001\u624b\u52a8\u7eed\u7b7e\u8bc1\u4e66\uff1ahttps: […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11595"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11595"}],"version-history":[{"count":1,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11595\/revisions"}],"predecessor-version":[{"id":11596,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/11595\/revisions\/11596"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}