Kubernetes 如何使用kubectl或web UI登录普罗米修斯吊舱

我正在使用prometheus（v2.16.0）刮取度量数据，现在我想登录prometheus pod检查配置文件路径：

    ~/Library/Mobile Documents/com~apple~CloudDocs/Document/k8s/work/kubernetes/cluster/addons/prometheus ⌚ 20:29:57
$ kubectl exec -it prometheus-0 -n kube-system /bin/bash

Defaulting container name to prometheus-server-configmap-reload.
Use 'kubectl describe pod/prometheus-0 -n kube-system' to see all of the containers in this pod.
OCI runtime exec failed: exec failed: container_linux.go:345: starting container process caused "exec: \"/bin/bash\": stat /bin/bash: no such file or directory": unknown
command terminated with exit code 126

~/Library/Mobile Documents/com~apple~CloudDocs/Document/k8s/work/kubernetes/cluster/addons/prometheus ⌚ 20:30:10
$ kubectl exec -it prometheus-0 -n kube-system /bin/ash

Defaulting container name to prometheus-server-configmap-reload.
Use 'kubectl describe pod/prometheus-0 -n kube-system' to see all of the containers in this pod.
OCI runtime exec failed: exec failed: container_linux.go:345: starting container process caused "exec: \"/bin/ash\": stat /bin/ash: no such file or directory": unknown
command terminated with exit code 126

~/Library/Mobile Documents/com~apple~CloudDocs/Document/k8s/work/kubernetes/cluster/addons/prometheus ⌚ 20:31:30
$ kubectl exec -it prometheus-0 -n kube-system /bash

Defaulting container name to prometheus-server-configmap-reload.
Use 'kubectl describe pod/prometheus-0 -n kube-system' to see all of the containers in this pod.
OCI runtime exec failed: exec failed: container_linux.go:345: starting container process caused "exec: \"/bash\": stat /bash: no such file or directory": unknown
command terminated with exit code 126

显然，我无法登录到普罗米修斯吊舱，我正在尝试另一种使用Web UI登录的方式：

---

可以这样登录pod吗？为什么我不能登录普罗米修斯吊舱

如输出中所述：

Defaulting container name to prometheus-server-configmap-reload.

这意味着pod中有多个容器，它会自动选择prometheus服务器configmap reload。这可能不是我们想要访问的容器

---

因此，访问prometheus bash命令行的正确方法是：

列出pod中的容器：

使用以下命令将Exec从上面的列表中插入到正确的容器中：

如果bash在容器映像中不可用，您也可以尝试

/bin/sh

或

/bin/sh

希望能有帮助

kubectl get pods prometheus-0 -n kube-system -o jsonpath='{.spec.containers[*].name}*

kubectl exec --namespace <namespace> -it <pod_name> -c <container> /bin/ash

kubectl exec -it -n prometheus-0 -c prometheus //bin/bash