ruby - Kubernetes + Minikube - 如何查看所有标准输出？

Question

我正在使用 Minikube 在 Kubernetes 上运行 Ruby 应用程序。

但是，每当我查看日志时，我都看不到在本地运行应用程序时会在终端中看到的输出。

我猜这是因为它只显示了 stderr？

如何查看所有类型的控制台日志(例如来自 puts 或 raise)？

环顾四周，这是否与处于分离模式有关 - 请参阅 Python 相关问题:Logs in Kubernetes Pod not showing up

谢谢。

=

根据要求 - 这是 deployment.yaml

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: sample
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: sample
    spec:
      containers:
        - name: sample
          image: someregistry
          imagePullPolicy: Always
          command: ["/bin/sh","-c"]
          args: ["bundle exec rake sample:default --trace"]
          envFrom:
          - configMapRef:
              name: sample
          - secretRef:
              name: sample
          ports:
            - containerPort: 3000
      imagePullSecrets:
        - name: regsecret

Answer 1

如本文所示，kubectl logs pod apod 应该向您显示部署在 minikube 中的 pod 的标准输出和标准错误。

By default in Kubernetes, Docker is configured to write a container's stdout and stderr to a file under /var/log/containers on the host system

Kubernetes adds :

There are two types of system components: those that run in a container and those that do not run in a container.
For example:

• The Kubernetes scheduler and kube-proxy run in a container.
• The kubelet and container runtime, for example Docker, do not run in containers.

和:

• On machines with systemd, the kubelet and container runtime write to journald.
• If systemd is not present, they write to .log files in the /var/log directory.

Similarly to the container logs, system component logs in the /var/log directory should be rotated.
In Kubernetes clusters brought up by the kube-up.sh script, those logs are configured to be rotated by the logrotate tool daily or once the size exceeds 100MB.