Kubernetes Postgres 总线错误（核心转储）

Question

我正在 kubernetes 上部署 pgadmin 和 postgres。当我查看部署时，我发现 2 个部署尚未准备好。当我查看 Pgadmin 的日志时，我发现它给出了错误，因为它无法连接到 postgres。我使用 configmap 将 pgadmin 连接到 postgres。当我查看 postgres 的日志时，我看到了错误。

日志：

The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.utf8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

fixing permissions on existing directory /var/lib/postgresql/data ... ok
creating subdirectories ... ok
selecting dynamic shared memory implementation ... posix
selecting default max_connections ... 20
selecting default shared_buffers ... 400kB
selecting default time zone ... Etc/UTC
creating configuration files ... ok
Bus error (core dumped)
child process exited with exit code 135
initdb: removing contents of data directory "/var/lib/postgresql/data"
running bootstrap script ...

yaml 文件：

#configmap
apiVersion: v1
kind: ConfigMap
metadata:
  name: postgres-configmap
data:
  db_url: postgres-service
---
#postgres
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres-deployment
  labels:
    app: postgres
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
      - name: postgres
        image: postgres:13.3
        ports:
        - containerPort: 5432
        env:
        - name: POSTGRES_PASSWORD
          valueFrom:
            secretKeyRef:
              name: postgres-secret
              key: postgres-password 
---
apiVersion: v1
kind: Service
metadata:
  name: postgres-service
spec:
  selector:
    app: postgres
  ports:
    - protocol: TCP
      port: 5432
      targetPort: 5432
---
#pgadmin
apiVersion: apps/v1
kind: Deployment
metadata:
  name: pgadmin-deployment
  labels:
    app: pgadmin
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pgadmin
  template:
    metadata:
      labels:
        app: pgadmin
    spec:
      containers:
      - name: pgadmin
        image: dpage/pgadmin4
        ports:
        - containerPort: 49762
        env:
        - name: PGADMIN_DEFAULT_EMAIL
          value: email@email.com
        - name: PGADMIN_DEFAULT_PASSWORD
          value: password
        - name: PGADMIN_LISTEN_ADDRESS
          valueFrom:
            configMapKeyRef:
              name: postgres-configmap
              key: db_url
---
apiVersion: v1
kind: Service
metadata:
  name: pgadmin-service
spec:
  selector:
    app: pgadmin
  type: LoadBalancer
  ports:
    - protocol: TCP
      port: 49762
      targetPort: 49762
      nodePort: 30001

Answer 1

在分析了 cmets 之后，看起来下面的资源有助于解决这个问题：

1. How to customize the configuration file of the official PostgreSQL Docker image?
2. https://github.com/docker-library/postgres/issues/451#issuecomment-447472044

总而言之，当 postgres 在容器内运行时编辑 /usr/share/postgresql/postgresql.conf.sample 文件可以通过将自定义 postgresql.conf 放在容器内的临时文件中并在运行时覆盖默认配置来完成，如 here 所述。此外，使用“play with kubernetes”websites 保留一个虚拟入口点脚本，然后启动容器或尝试将文件复制到容器中可能会很有用。