我想访问我的Kubernetes裸机集群,其中有一个暴露的Nginx入口控制器用于TLS终止 . 为了能够自动更新证书,我想使用Kubenetes插件cert-manager,这是kube-lego的继任者 .
到目前为止我做了什么:
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在这个guide之后,在裸机(1个主人,1个小兵,都运行Ubuntu 16.04.4 LTS)上设置Kubernetes(v1.9.3)群集,其中kubeadm和法兰绒作为pod网络 .
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使用Kubernetes包管理器helm安装nginx-ingress(图表版本0.9.5)
helm install --name nginx-ingress --namespace kube-system stable/nginx-ingress --set controller.hostNetwork=true,rbac.create=true,controller.service.type=ClusterIP
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使用helm安装cert-manager(图表版本0.2.2)
helm install --name cert-manager --namespace kube-system stable/cert-manager --set rbac.create=true
当我使用Ingress资源进行测试时,Ingress Controller已成功公开并按预期工作 . 对于正确的Let's加密证书管理和使用cert-manager的自动续订,我首先需要一个Issuer资源 . 我是从这个acme-staging-issuer.yaml创建的:
apiVersion: certmanager.k8s.io/v1alpha1
kind: Issuer
metadata:
name: letsencrypt-staging
namespace: default
spec:
acme:
server: https://acme-staging.api.letsencrypt.org/directory
email: email@example.com
privateKeySecretRef:
name: letsencrypt-staging
http01: {}
kubectl create -f acme-staging-issuer.yaml成功运行但kubectl描述issuer / letsencrypt-staging给了我:
Status:
Acme:
Uri:
Conditions:
Last Transition Time: 2018-03-05T21:29:41Z
Message: Failed to verify ACME account: Get https://acme-staging.api.letsencrypt.org/directory: tls: oversized record received with length 20291
Reason: ErrRegisterACMEAccount
Status: False
Type: Ready
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ErrVerifyACMEAccount 1s (x11 over 7s) cert-manager-controller Failed to verify ACME account: Get https://acme-staging.api.letsencrypt.org/directory: tls: oversized record received with length 20291
Warning ErrInitIssuer 1s (x11 over 7s) cert-manager-controller Error initializing issuer: Get https://acme-staging.api.letsencrypt.org/directory: tls: oversized record received with length 20291
如果没有现成的Issuer,我就无法继续生成证书管理器证书或使用ingress-shim(用于自动续订) .
我的设置中缺少什么?使用hostNetwork = true暴露入口控制器是否足够,或者是否有更好的方法在裸机群集上公开其端口80和443?如何解决tls:创建cert-manager颁发者资源时超大记录收到错误?
1 回答
tls:超大记录收到的错误是由Kubernetes小兵的错误配置
/etc/resolv.conf
引起的 . 可以通过编辑它来解决它:添加名称服务器列表:
更新resolvconf: