ConfigMap 实现 nginx 容器的配置文件管理
1、在k8s集群拉起一个nginx的pod，通过默认80去访问。
- 编写nginx的yaml文件。
[root@k8s-master ~]# cat my-nginx.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.18.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
- 创建并查看nginx的pod。
[root@k8s-master ~]# kubectl apply -f my-nginx.yaml
deployment.apps/my-nginx created
[root@k8s-master ~]# kubectl get pod my-nginx-67dfd6c8f9-fn8jf -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx-67dfd6c8f9-fn8jf 1/1 Running 0 84s 10.244.1.207 k8s-node-1.example.com <none> <none>
- 测试访问nginx的80端口。
[root@k8s-master ~]# curl http://10.244.1.207
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
2、为nginx的配置文件创建ConfigMap。
- 编写nginx的配置文件的yaml文件。把默认监听端口修改为8080。
[root@k8s-master ~]# cat nginx-conf.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-conf
data:
default.conf: |-
server {
listen 8080;
listen [::]:80;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
- 创建并查看ConfigMap。
[root@k8s-master ~]# kubectl apply -f nginx-conf.yaml
configmap/nginx-conf created
[root@k8s-master ~]# kubectl get cm nginx-conf
NAME DATA AGE
nginx-conf 1 21s
[root@k8s-master ~]# kubectl describe cm nginx-conf
Name: nginx-conf
Namespace: default
Labels: <none>
Annotations: <none>
Data
====
default.conf:
----
server {
listen 8080;
listen [::]:80;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
Events: <none>
3、在k8s集群拉起一个nginx的pod并加载ConfigMap，通过默认8080去访问。
- 编写nginx的yaml文件，并加载ConfigMap。
[root@k8s-master ~]# cat my-nginx-cm.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.18.0
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
volumeMounts:
- name: config-volume
mountPath: /etc/nginx/conf.d
volumes:
- name: config-volume
configMap:
name: nginx-conf
- 创建并查看nginx的pod。
[root@k8s-master ~]# kubectl apply -f my-nginx-cm.yaml
deployment.apps/my-nginx created
[root@k8s-master ~]# kubectl get pod my-nginx-f79db7777-m9l22 -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx-f79db7777-m9l22 1/1 Running 0 56s 10.244.1.209 k8s-node-1.example.com <none> <none>
- 测试访问nginx的8080端口。
[root@k8s-master ~]# curl http://10.244.1.209:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
- 进入到nginx的pod，查看nginx的配置文件。
[root@k8s-master ~]# kubectl exec -it my-nginx-f79db7777-m9l22 -- /bin/bash
root@my-nginx-f79db7777-m9l22:/# cat /etc/nginx/conf.d/default.conf
server {
listen 8080;
listen [::]:80;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}root@my-nginx-f79db7777-m9l22:/# 转自
K8s ConfigMap 存储 Nginx 配置文件
https://mp.weixin.qq.com/s/6aP7xI0bBtf48sOOwYMtYQ