(2022版)一套教程搞定k8s安装到实战 | ConfiMap
2023-09-14 09:09:08 时间
视频来源:B站《(2022版)最新、最全、最详细的Kubernetes(K8s)教程,从K8s安装到实战一套搞定》
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一般用ConfigMap去管理一些配置文件,或者一些大量的环境变量信息。
ConfigMap将配置和Pod分开,有一个nginx,nginx.conf -> configmap。更易于配置文件的更改和管理。
Secret:Secret更倾向于存储和共享敏感、加密的配置信息。
ConfigMap中文地址:kubernetes.io/zh/docs/tas…
生成special-config的configmap
kubectl create configmap special-config --from-literal=special.how=very
复制代码
test-env-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: dapi-test-pod
spec:
nodeName: k8s-node01
containers:
- name: test-container
image: busybox:1.28
imagePullPolicy: IfNotPresent
command: [ "/bin/sh", "-c", "env" ]
envFrom:
- configMapRef:
name: special-config
env:
# Define the environment variable
# - name: SPECIAL_LEVEL_KEY
# valueFrom:
# configMapKeyRef:
# # The ConfigMap containing the value you want to assign to SPECIAL_LEVEL_KEY
# name: special-config
# # Specify the key associated with the value
# key: special.how
- name: test
value: test-value
- name: mysqlHostAddress
value: 10.10.10.10
- name: mysqlPort
value: "3306" # only string
restartPolicy: Never
复制代码
[root@k8s-master-lb ~]# kubectl apply -f test-env-pod.yaml
pod/dapi-test-pod created
[root@k8s-master-lb ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 31 15d
dapi-test-pod 0/1 Completed 0 4s
nginx-66bbc9fdc5-mbqkf 1/1 Running 4 16d
nginx-66bbc9fdc5-x7vkl 1/1 Running 2 16d
web-0 1/1 Running 2 15d
web-1 1/1 Running 4 15d
web-2 1/1 Running 4 15d
[root@k8s-master-lb ~]# kubectl logs -f dapi-test-pod
mysqlPort=3306
KUBERNETES_SERVICE_PORT=443
KUBERNETES_PORT=tcp://10.96.0.1:443
mysqlHostAddress=10.10.10.10
test=test-value
HOSTNAME=dapi-test-pod
SHLVL=1
HOME=/root
KUBERNETES_PORT_443_TCP_ADDR=10.96.0.1
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
KUBERNETES_PORT_443_TCP_PORT=443
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_SERVICE_PORT_HTTPS=443
KUBERNETES_PORT_443_TCP=tcp://10.96.0.1:443
special.how=very
KUBERNETES_SERVICE_HOST=10.96.0.1
PWD=/
[root@k8s-master-lb ~]#
复制代码
把ConfigMap挂载到容器中
[root@k8s-master-lb ~]# cat test-env-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: dapi-test-pod
spec:
nodeName: k8s-node01
containers:
- name: test-container
image: busybox:1.28
imagePullPolicy: IfNotPresent
command: [ "/bin/sh", "-c", "sleep 3600" ]
volumeMounts:
- name: config-volume
mountPath: /mnt
envFrom:
- configMapRef:
name: special-config
env:
# Define the environment variable
# - name: SPECIAL_LEVEL_KEY
# valueFrom:
# configMapKeyRef:
# # The ConfigMap containing the value you want to assign to SPECIAL_LEVEL_KEY
# name: special-config
# # Specify the key associated with the value
# key: special.how
- name: test
value: test-value
- name: mysqlHostAddress
value: 10.10.10.10
- name: mysqlPort
value: "3306" # only string
restartPolicy: Never
volumes:
- name: config-volume
configMap:
name: special-config
[root@k8s-master-lb ~]#
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