将 nginx.conf 添加到 Kubernetes 集群

Question

如何将nginx.conf 配置文件传递给在 Kubernetes 集群中运行的 nginx 实例？

Answer 1

您可以创建一个 ConfigMap 对象，然后将值作为文件挂载到您需要的位置：

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-config
data:
  nginx.conf: |
    your config
    comes here
    like this
  other.conf: |
    second file
    contents

在你的 pod 规格中：

spec:
  containers:
    - name: nginx
      image: nginx
      volumeMounts:
        - name: nginx-config
          mountPath: /etc/nginx/nginx.conf
          subPath: nginx.conf
        - name: other.conf
          mountPath: /etc/nginx/other.conf
          subPath: other.conf
  volumes:
    - name: nginx-config
      configMap:
        name: nginx-config

（注意 mountPath 中文件名的重复，使用完全相同的 subPath；与绑定挂载文件相同。）

有关 ConfigMap 的更多信息，请参阅： https://kubernetes.io/docs/user-guide/configmap/

注意：使用 ConfigMap 作为 subPath 卷的容器将不会收到 ConfigMap 更新。

Answer 2

我还没有找到一个很好的方法来逃避 ConfigMap 中的 nginx 配置内容。对我来说最好的办法是使用文件创建 ConfigMap

将以下内容另存为./data/nginx.conf

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                        '$status $body_bytes_sent "$http_referer" '
                        '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

现在创建 configMap kubectl create configmap confnginx --from-file=./data/nginx.conf

将以下部署和 pod yaml 保存为 nginx.yaml

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx     
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 1 # tells deployment to run 2 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      # unlike pod-nginx.yaml, the name is not included in the meta data as a unique name is
      # generated from the deployment name
      labels:
        app: nginx     
    spec:
      containers:
        - name: nginx
          image: nginx:alpine
          ports:
          - containerPort: 80        
          volumeMounts:
            - name: nginx-config
              mountPath: /etc/nginx/nginx.conf
              subPath: nginx.conf
      volumes:
        - name: nginx-config
          configMap:
            name: confnginx

现在在 k8 中创建它 kubectl apply -f nginx.yaml