我想在 kubernetes yaml 文件中 apt-get install sysstat 命令

Question

集群信息：
Kubernetes 版本：1.8
正在使用的云：（如果不在公共云上，则放置裸机）AWS EKS
主机操作系统：debian linux

当我部署 pod 时，我希望我的 pod 自动安装并启动 sysstat

这是我下面的两个yaml，但是当我在下面输入命令时它不起作用CrashLoopBackoff：[“/bin/sh”，“-c”]、args：[“apt-get install sysstat”]” 「图片：」

cat deploy/db/statefulset.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: 
    sbdemo-postgres-sfs
spec:
  serviceName: sbdemo-postgres-service
  replicas: 1
  selector:
    matchLabels:
      app: sbdemo-postgres-sfs
  template:
    metadata:
      labels:
        app: sbdemo-postgres-sfs
    spec:
      containers:
       - name: postgres
         image: dayan888/springdemo:postgres9.6
         ports:
          - containerPort: 5432
         **command: ["/bin/bash", "-c"]**
         **args: ["apt-get install sysstat"]**
         volumeMounts:
         - name: pvc-db-volume
           mountPath: /var/lib/postgresql
  volumeClaimTemplates:
  - metadata:
      name: pvc-db-volume
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 1G

cat deploy/web/deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sbdemo-nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: sbdemo-nginx
  template:
    metadata:
      labels:
        app: sbdemo-nginx
    spec:
      containers:
      - name: nginx
        image: gobawoo21/springdemo:nginx
         **command: ["/bin/bash", "-c"]**
         **args: ["apt-get install sysstat"]**
        ports:
        - containerPort: 80
        volumeMounts:
        - name: nginx-conf
          mountPath: /etc/nginx/nginx.conf
          subPath: nginx.conf
        - name: server-conf
          mountPath: /etc/nginx/conf.d/server.conf
          subPath: server.conf
      volumes:
      - name: nginx-conf
        configMap: 
          name: nginx-conf
          items:
            - key: nginx.conf
              path: nginx.conf
      - name: server-conf
        configMap: 
          name: server-conf
          items:
            - key: server.conf
              path: server.conf

有人知道如何在部署 pod 时自动设置存储库吗？

问候

Answer 1

最佳做法是在映像构建阶段安装软件包。您只需将此步骤添加到您的 Dockerfile。

FROM postgres:9.6

RUN apt-get update &&\ 
    apt-get install sysstat -y &&\
    rm -rf /var/lib/apt/lists/*

COPY deploy/db/init_ddl.sh /docker-entrypoint-initdb.d/
RUN chmod +x /docker-entrypoint-initdb.d/init_ddl.sh

Kube 清单

   spec:
      containers:
       - name: postgres
         image: harik8/sof:62298191
         imagePullPolicy: Always
         ports:
          - containerPort: 5432
         env:
         - name: POSTGRES_PASSWORD
           value: password
         volumeMounts:
         - name: pvc-db-volume
           mountPath: /var/lib/postgresql

它应该运行（请忽略POSTGRES_PASSWORD env 变量）

$ kubectl get po
NAME                    READY   STATUS      RESTARTS   AGE
sbdemo-postgres-sfs-0   1/1     Running     0          8m46s

验证

$ kubectl exec -it sbdemo-postgres-sfs-0 bash
root@sbdemo-postgres-sfs-0:/# iostat
Linux 4.19.107 (sbdemo-postgres-sfs-0)  06/10/2020      _x86_64_        (4 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          10.38    0.01    6.28    0.24    0.00   83.09

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
vda             115.53      1144.72      1320.48    1837135    2119208
scd0              0.02         0.65         0.00       1048          0

Answer 2

如果这是可能的，那就是有问题。您的容器不应该以 root 身份运行，因此即使您修复了这种方法，它也不应该工作。你需要做的是把它放在你的容器构建中（即在 Dockerfile 中）。