Kubernetes Pod 控制器 ReplicaSet
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kubectl explain ReplicaSet
yml 文件
replicas: 3
:指定运行3
个实例。
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: pc-replicaset
namespace: dev
spec:
replicas: 3
selector:
matchLabels:
app: nginx-pod
template:
metadata:
labels:
app: nginx-pod
spec:
containers:
- name: nginx
image: nginx:1.17.1
查看副本集信息
kubectl get rs -n dev -o wide
输出:
[root@localhost ~]# kubectl get rs -n dev -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
pc-replicaset 3 3 3 10m nginx nginx:1.17.1 app=nginx-pod
查看运行的 Pod
kubectl get pods -n dev -o wide
输出:
[root@localhost ~]# kubectl get pods -n dev -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pc-replicaset-jv4dn 1/1 Running 0 12m 10.42.0.9 localhost.localdomain <none> <none>
pc-replicaset-9ksk7 1/1 Running 0 12m 10.42.0.11 localhost.localdomain <none> <none>
pc-replicaset-2c5gz 1/1 Running 0 12m 10.42.0.10 localhost.localdomain <none> <none>
扩缩容
edit 方式
使用edit
编辑副本集名为pc-replicaset
的配置。
该命令进入的编辑页面与Vim
用法一致。
kubectl edit rs pc-replicaset -n dev
将replicas
修改为6
,输出:
[root@localhost ~]# kubectl get pods -n dev -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pc-replicaset-jv4dn 1/1 Running 0 15m 10.42.0.9 localhost.localdomain <none> <none>
pc-replicaset-9ksk7 1/1 Running 0 15m 10.42.0.11 localhost.localdomain <none> <none>
pc-replicaset-2c5gz 1/1 Running 0 15m 10.42.0.10 localhost.localdomain <none> <none>
pc-replicaset-l6shs 1/1 Running 0 2m25s 10.42.0.13 localhost.localdomain <none> <none>
pc-replicaset-zc8fj 1/1 Running 0 2m25s 10.42.0.14 localhost.localdomain <none> <none>
pc-replicaset-wpbpn 1/1 Running 0 2m25s 10.42.0.12 localhost.localdomain <none> <none>
scale 方式
kubectl scale rs pc-replicaset --replicas=2 -n dev
将replicas
调整为2
,输出:
[root@localhost ~]# kubectl get pods -n dev -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pc-replicaset-jv4dn 1/1 Running 0 19m 10.42.0.9 localhost.localdomain <none> <none>
pc-replicaset-9ksk7 1/1 Running 0 19m 10.42.0.11 localhost.localdomain <none> <none>
镜像升级
备注:也可以使用edit
方式
kubectl set image rs pc-replicaset nginx=nginx:1.17.2 -n dev
查看实例,输出:
[root@localhost ~]# kubectl get rs -n dev -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
pc-replicaset 2 2 2 32m nginx nginx:1.17.2 app=nginx-pod
删除 ReplicaSet
通过名称删除
kubectl delete rs pc-replicaset -n dev
通过yml
文件删除
kubectl delete -f pc-replicaset.yml
Views: 1,383 · Posted: 2022-03-10
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