11-常见的控制器01(rc·rs·deploy)及服务发现(service)
一、rc控制器 ReplicationController
1.什么是rc控制器
rc的全称为ReplicationController，简称rc，该控制器可以控制指定Pod副本数量始终存活。
主要作用是保证指定数量的 Pod 副本始终运行，并提供自动恢复和滚动更新功能。
2.实战案例
2.1 编写资源清单
[root@master231 replicationcontrollers]# cat 01-rc-xiuxian.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: rc-xiuxian
labels:
apps: xiuxian
spec:
# 指的Pod的副本数量
replicas: 3
# 标签选择器，基于标签关联Pod
selector:
version: v1
# 定义Pod的模板，将来创建Pod时基于该模板进行创建
template:
metadata:
labels:
version: v1
school: oldboyedu
class: linux96
spec:
containers:
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
name: xiuxian
2.2 创建资源
[root@master231 replicationcontrollers]# kubectl apply -f 01-rc-xiuxian.yaml
replicationcontroller/rc-xiuxian created
2.3 同时查看rc和pod的信息
#简略信息
[root@master231 replicationcontrollers]# kubectl get rc,pod --show-labels
NAME DESIRED CURRENT READY AGE LABELS
replicationcontroller/rc-xiuxian 3 3 3 67s apps=xiuxian
NAME READY STATUS RESTARTS AGE LABELS
pod/rc-xiuxian-6p6l4 1/1 Running 0 67s class=linux96,school=oldboyedu,version=v1
pod/rc-xiuxian-dhtbf 1/1 Running 0 67s class=linux96,school=oldboyedu,version=v1
pod/rc-xiuxian-nwxmz 1/1 Running 0 67s class=linux96,school=oldboyedu,version=v1
#详细信息
[root@master231 replicationcontrollers]# kubectl get rc,pod --show-labels -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR LABELS
replicationcontroller/rc-xiuxian 3 3 3 71s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 version=v1 apps=xiuxian
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES LABELS
pod/rc-xiuxian-6p6l4 1/1 Running 0 71s 10.100.140.92 worker233 <none> <none> class=linux96,school=oldboyedu,version=v1
pod/rc-xiuxian-dhtbf 1/1 Running 0 71s 10.100.203.149 worker232 <none> <none> class=linux96,school=oldboyedu,version=v1
pod/rc-xiuxian-nwxmz 1/1 Running 0 71s 10.100.203.148 worker232 <none> <none> class=linux96,school=oldboyedu,version=v1
2.4 查看Pod被哪个控制器管理
[root@master231 replicationcontrollers]# kubectl get pods -l version=v1
NAME READY STATUS RESTARTS AGE
rc-xiuxian-6p6l4 1/1 Running 0 2m36s
rc-xiuxian-dhtbf 1/1 Running 0 2m36s
rc-xiuxian-nwxmz 1/1 Running 0 2m36s
[root@master231 replicationcontrollers]# kubectl describe pod | grep "Controlled By"
Controlled By: ReplicationController/rc-xiuxian
Controlled By: ReplicationController/rc-xiuxian
Controlled By: ReplicationController/rc-xiuxian
2.5 删除资源验证Pod副本数量始终存活
[root@master231 replicationcontrollers]# kubectl get pods -l version=v1
NAME READY STATUS RESTARTS AGE
rc-xiuxian-6p6l4 1/1 Running 0 4m38s
rc-xiuxian-dhtbf 1/1 Running 0 4m38s
rc-xiuxian-nwxmz 1/1 Running 0 4m38s
[root@master231 replicationcontrollers]# kubectl delete pods -l version=v1
pod "rc-xiuxian-6p6l4" deleted
pod "rc-xiuxian-dhtbf" deleted
pod "rc-xiuxian-nwxmz" deleted
[root@master231 replicationcontrollers]# kubectl get pods -l version=v1
NAME READY STATUS RESTARTS AGE
rc-xiuxian-mvddc 1/1 Running 0 5s
rc-xiuxian-rzds4 1/1 Running 0 5s
rc-xiuxian-z24z5 1/1 Running 0 5s
二、Service(svc)
1.什么是Service
所谓的Service翻译过来表示'服务'，其作用也是基于标签关联Pod，可以将Pod的端口进行暴露。从而提供统一的服务。简称svc
2.svc的四种类型
ClusterIP:
一般情况下是K8S集群内部服务互相访问的一种类型。
NodePort:
在ClusterIP基础之上，早期版本监听了所有的worker节点特定端口，新版本会有对应的iptables规则做NAT。
LoadBalancer:
一般情况下是在云厂商的K8S环境使用。
ExternalName:
一般情况下用于映射K8S集群外部的某个特定服务。
3.svc拥有三个主要特征
- 1.基于标签关联后端的Pod，为Pod提供统一的访问入口;
- 2.拥有服务发现的特征，当后端关联的Pod的IP地址发生变动时，会自动更新Endpoints列表;
- 3.拥有负载均衡的能力，该能力底层是由kube-proxy组件提供
4.响应式创建Service (ClusterIP)
4.1 基于rc资源暴露，从而创建svc
service类型不指定默认为ClusterIP
[root@master231 replicationcontrollers]# kubectl expose rc rc-xiuxian --port=80
service/rc-xiuxian exposed
[root@master231 replicationcontrollers]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.200.0.1 <none> 443/TCP 28h
rc-xiuxian ClusterIP 10.200.196.245 <none> 80/TCP 15s
4.2 svc会服务发现对应后端的Pod地址
[root@master231 replicationcontrollers]# kubectl describe svc rc-xiuxian
Name: rc-xiuxian
Namespace: default
Labels: apps=xiuxian
Annotations: <none>
Selector: version=v1
Type: ClusterIP
IP Family Policy: SingleStack
IP Families: IPv4
#因为是ClusterIP类型，所以只是对集群内部的统一访问入口，不对外提供访问
IP: 10.200.196.245
IPs: 10.200.196.245
Port: <unset> 80/TCP
TargetPort: 80/TCP
Endpoints: 10.100.140.94:80,10.100.203.152:80,10.100.203.153:80
Session Affinity: None
Events: <none>
#对应Endpoints
[root@master231 replicationcontrollers]# kubectl get pods -l version=v1 -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rc-xiuxian-dgnqj 1/1 Running 0 8m5s 10.100.203.153 worker232 <none> <none>
rc-xiuxian-fz4sp 1/1 Running 0 8m5s 10.100.140.94 worker233 <none> <none>
rc-xiuxian-m6m4v 1/1 Running 0 8m5s 10.100.203.152 worker232 <none> <none>
4.3 删除资源再次查看
#删除
[root@master231 replicationcontrollers]# kubectl delete pods -l version=v1
pod "rc-xiuxian-dgnqj" deleted
pod "rc-xiuxian-fz4sp" deleted
pod "rc-xiuxian-m6m4v" deleted
#查看，发现podIP变了
[root@master231 replicationcontrollers]# kubectl get pods -l version=v1 -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rc-xiuxian-bg7ch 1/1 Running 0 8s 10.100.140.95 worker233 <none> <none>
rc-xiuxian-d5ng4 1/1 Running 0 8s 10.100.203.154 worker232 <none> <none>
rc-xiuxian-mjs4q 1/1 Running 0 8s 10.100.203.155 worker232 <none> <none>
[root@master231 replicationcontrollers]#
#查看统一的访问入口 ，没变
[root@master231 replicationcontrollers]# kubectl describe svc rc-xiuxian
Name: rc-xiuxian
Namespace: default
Labels: apps=xiuxian
Annotations: <none>
Selector: version=v1
Type: ClusterIP
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.200.196.245
IPs: 10.200.196.245
Port: <unset> 80/TCP
TargetPort: 80/TCP
Endpoints: 10.100.140.95:80,10.100.203.154:80,10.100.203.155:80
Session Affinity: None
Events: <none>
4.4 通过svc提供统一的访问入口
[root@master231 replicationcontrollers]# curl 10.200.196.245
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>yinzhengjie apps v1</title>
<style>
div img {
width: 900px;
height: 600px;
margin: 0;
}
</style>
</head>
<body>
<h1 style="color: green">凡人修仙传 v1 </h1>
<div>
<img src="1.jpg">
<div>
</body>
</html>
5.声明式创建Service
5.1 快速获取资源清单的模板
[root@master231 service]# kubectl expose rc rc-xiuxian --port=80 -o yaml --dry-run=client
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
apps: xiuxian
name: rc-xiuxian
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
version: v1
status:
loadBalancer: {}
5.2 编写资源清单
[root@master231 service]# cat 01-svc-xiuxian.yaml
apiVersion: v1
kind: Service
metadata:
labels:
apps: xiuxian
name: svc-xiuxian
spec:
# 配置端口映射
ports:
# 表示svc的端口
- port: 90
# 声明要用的协议，默认就是TCP，有效值为: "TCP", "UDP", and "SCTP"
protocol: TCP
# Pod的端口地址
targetPort: 80
# 关联后端的Pod
selector:
version: v1
5.3 创建svc并查看svc的详细信息
#创建资源
[root@master231 service]# kubectl apply -f 01-svc-xiuxian.yaml
service/svc-xiuxian created
#查看服务发现信息
[root@master231 service]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.200.0.1 <none> 443/TCP 28h
rc-xiuxian ClusterIP 10.200.196.245 <none> 80/TCP 13m
svc-xiuxian ClusterIP 10.200.25.148 <none> 90/TCP 3s
[root@master231 service]# kubectl get svc svc-xiuxian
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
svc-xiuxian ClusterIP 10.200.25.148 <none> 90/TCP 8s
#查看svc-xiuxian资源的svc的详细信息
[root@master231 service]# kubectl describe svc svc-xiuxian
Name: svc-xiuxian
Namespace: default
Labels: apps=xiuxian
Annotations: <none>
Selector: version=v1
Type: ClusterIP
IP Family Policy: SingleStack
IP Families: IPv4
IP: 10.200.25.148
IPs: 10.200.25.148
Port: <unset> 90/TCP
TargetPort: 80/TCP
Endpoints: 10.100.140.95:80,10.100.203.154:80,10.100.203.155:80
Session Affinity: None
Events: <none>
5.4 访问测试
[root@master231 service]# curl 10.200.25.148:90
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>yinzhengjie apps v1</title>
<style>
div img {
width: 900px;
height: 600px;
margin: 0;
}
</style>
</head>
<body>
<h1 style="color: green">凡人修仙传 v1 </h1>
<div>
<img src="1.jpg">
<div>
</body>
</html>
5.5 测试验证svc拥有负载均衡的能力
#查看正在运行的容器
[root@master231 service]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rc-xiuxian-bg7ch 1/1 Running 0 8m43s 10.100.140.95 worker233 <none> <none>
rc-xiuxian-d5ng4 1/1 Running 0 8m43s 10.100.203.154 worker232 <none> <none>
rc-xiuxian-mjs4q 1/1 Running 0 8m43s 10.100.203.155 worker232 <none> <none>
#修改nginx页面
[root@master231 service]# kubectl exec -it rc-xiuxian-bg7ch -- sh
/ # echo 11111111 > /usr/share/nginx/html/index.html
/ #
[root@master231 service]#
[root@master231 service]# kubectl exec -it rc-xiuxian-d5ng4 -- sh
/ # echo 222222222 > /usr/share/nginx/html/index.html
/ #
[root@master231 service]#
[root@master231 service]# kubectl exec -it rc-xiuxian-mjs4q -- sh
/ # echo 3333333333 > /usr/share/nginx/html/index.html
/ #
#访问测试
[root@master231 service]# for i in `seq 10`;do curl 10.200.25.148:90;done
222222222
11111111
222222222
222222222
222222222
3333333333
222222222
3333333333
11111111
222222222
三、rs控制器 ReplicaSet
1.什么是rs
rs全称为ReplicaSet，也是K8S集群的一个副本控制器，功能和rc类似。
相比于rc而言，功能更加丰富。且更加轻量级
2.实战案例
2.1 基于标签匹配matchLabels
[root@master231 replicasets]# cat 01-rs-matchLabels-xiuxian.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: rs-xiuxian
labels:
apps: xiuxian
spec:
replicas: 5
selector:
# 匹配Pod时基于标签匹配
matchLabels:
version: v1
template:
metadata:
labels:
version: v1
school: oldboyedu
class: linux96
spec:
containers:
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
name: xiuxian
2.2 获取rs和pod的相关信息
[root@master231 replicasets]# kubectl get rs,po
NAME DESIRED CURRENT READY AGE
replicaset.apps/rs-xiuxian 5 5 5 84s
NAME READY STATUS RESTARTS AGE
pod/rs-xiuxian-9jlbb 1/1 Running 0 84s
pod/rs-xiuxian-j8xlz 1/1 Running 0 83s
pod/rs-xiuxian-qj9x6 1/1 Running 0 84s
pod/rs-xiuxian-wgx4z 1/1 Running 0 84s
pod/rs-xiuxian-zsdsw 1/1 Running 0 83s
#删除所有pod
[root@master231 replicasets]# kubectl delete pods --all
pod "rs-xiuxian-9jlbb" deleted
pod "rs-xiuxian-j8xlz" deleted
pod "rs-xiuxian-qj9x6" deleted
pod "rs-xiuxian-wgx4z" deleted
pod "rs-xiuxian-zsdsw" deleted
#再次查看
[root@master231 replicasets]# kubectl get rs,po
NAME DESIRED CURRENT READY AGE
replicaset.apps/rs-xiuxian 5 5 5 96s
NAME READY STATUS RESTARTS AGE
pod/rs-xiuxian-bfn8n 1/1 Running 0 4s
pod/rs-xiuxian-bzncd 1/1 Running 0 4s
pod/rs-xiuxian-czkrr 1/1 Running 0 4s
pod/rs-xiuxian-kn8hb 1/1 Running 0 4s
pod/rs-xiuxian-n2x7p 1/1 Running 0 4s
2.3 基于标签表达式
[root@master231 replicasets]# kubectl run test01 --image=registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 -l version=v1
pod/test01 created
[root@master231 replicasets]# kubectl run test02 --image=registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 -l version=v2
pod/test02 created
[root@master231 replicasets]#
[root@master231 replicasets]# kubectl run test03 --image=registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 -l version=v3
pod/test03 created
[root@master231 replicasets]#
[root@master231 replicasets]# kubectl run test04 --image=registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 -l version=v4
pod/test04 created
[root@master231 replicasets]#
[root@master231 replicasets]# kubectl run test05 --image=registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 -l version=v5
pod/test05 created
[root@master231 replicasets]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test01 1/1 Running 0 25s version=v1
test02 1/1 Running 0 20s version=v2
test03 1/1 Running 0 16s version=v3
test04 1/1 Running 0 11s version=v4
test05 1/1 Running 0 7s version=v5
#编写列表清单
[root@master231 replicasets]# cat 02-rs-matchExpressions-xiuxian.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: rs-xiuxian-matchexpressions
labels:
apps: xiuxian
spec:
replicas: 5
selector:
# 匹配Pod时基于标签表达式
matchExpressions:
# 指定标签的key
- key: version
# 指定标签的值，可以有多个
values:
- v1
- v2
- v3
# 声明key和value之间的关系，有效值为: In, NotIn, Exists and DoesNotExist
# In:
# key的值必须在vlaues规定的值列表中之一。
# NotIn:
# 和In相反。
# Exists:
# 如果是存在的话， 意味着value可以不写，表示只要存在指定的key即可。values任意。
# DoesNotExist:
# 如果是不存在的话，意味着value可以不写，表示只要不存在指定的key即可。values任意。
operator: In
template:
metadata:
labels:
version: v1
school: oldboyedu
class: linux96
spec:
containers:
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
name: xiuxian
#创建资源
[root@master231 replicasets]# kubectl apply -f 02-rs-matchExpressions-xiuxian.yaml
replicaset.apps/rs-xiuxian-matchexpressions created
#查看列表清单
[root@master231 replicasets]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
rs-xiuxian-matchexpressions-2brnv 1/1 Running 0 3s 10.100.140.103 worker233 <none> <none>
rs-xiuxian-matchexpressions-c8tx8 1/1 Running 0 3s 10.100.203.164 worker232 <none> <none>
test01 1/1 Running 0 60s 10.100.203.161 worker232 <none> <none>
test02 1/1 Running 0 55s 10.100.203.162 worker232 <none> <none>
test03 1/1 Running 0 51s 10.100.140.101 worker233 <none> <none>
test04 1/1 Running 0 46s 10.100.203.163 worker232 <none> <none>
test05 1/1 Running 0 42s 10.100.140.102 worker233 <none> <none>
#查看rs相关信息
[root@master231 replicasets]# kubectl get rs
NAME DESIRED CURRENT READY AGE
rs-xiuxian-matchexpressions 5 5 5 18s
#新添加了2个副本
[root@master231 replicasets]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
rs-xiuxian-matchexpressions-2brnv 1/1 Running 0 28s class=linux96,school=oldboyedu,version=v1
rs-xiuxian-matchexpressions-c8tx8 1/1 Running 0 28s class=linux96,school=oldboyedu,version=v1
test01 1/1 Running 0 85s version=v1
test02 1/1 Running 0 80s version=v2
test03 1/1 Running 0 76s version=v3
test04 1/1 Running 0 71s version=v4
test05 1/1 Running 0 67s version=v5
3.理解？
在上边的实战中，我们先运行了几个Pod，标签分别为v1,v2,v3,v4,v5。
紧接着，我们又编写了列表清单，指定了匹配带有v1,v2,v3的Pod，并指定了key的值必须在vlaues规定的值列表中之一(In)，模版中创建的标签为v1。
所以在根据列表清单创建资源时，已经匹配到了3个符合条件的标签，所以只会创建两个副本
四、常见的控制器之deploy实战
1.什么是deploy
deploy全称为deployments，翻译为中文是'部署'的意思。
该控制器不直接控制Pod，而是调用rs控制pod副本数量，且支持声明式更新。
2.实战案例
2.1 基于matchLabels实战1
[root@master231 deployments]# cat 01-deploy-matchLabels-xiuxian.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-xiuxian
labels:
apps: xiuxian
spec:
replicas: 5
selector:
matchLabels:
version: v1
template:
metadata:
labels:
version: v1
school: oldboyedu
class: linux96
spec:
containers:
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
name: xiuxian
[root@master231 deployments]# kubectl apply -f 01-deploy-matchLabels-xiuxian.yaml
deployment.apps/deploy-xiuxian created
#获取deploy,rs,po的相关信息
[root@master231 deployments]# kubectl get deploy,rs,po -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/deploy-xiuxian 5/5 5 5 9s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 version=v1
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/deploy-xiuxian-9ddcfd7db 5 5 5 9s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 pod-template-hash=9ddcfd7db,version=v1
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-xiuxian-9ddcfd7db-2np97 1/1 Running 0 9s 10.100.203.172 worker232 <none> <none>
pod/deploy-xiuxian-9ddcfd7db-4jbl6 1/1 Running 0 9s 10.100.203.173 worker232 <none> <none>
pod/deploy-xiuxian-9ddcfd7db-9w6v4 1/1 Running 0 9s 10.100.140.109 worker233 <none> <none>
pod/deploy-xiuxian-9ddcfd7db-nvb9m 1/1 Running 0 9s 10.100.140.108 worker233 <none> <none>
pod/deploy-xiuxian-9ddcfd7db-vhfs4 1/1 Running 0 9s 10.100.203.174 worker232 <none> <none>
[root@master231 deployments]# kubectl get deployments.apps deploy-xiuxian -o yaml | grep "image:"
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
[root@master231 deployments]#
[root@master231 deployments]# kubectl edit deployments.apps deploy-xiuxian
deployment.apps/deploy-xiuxian edited
[root@master231 deployments]#
[root@master231 deployments]# kubectl get deployments.apps deploy-xiuxian -o yaml | grep "image:"
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2
[root@master231 deployments]# kubectl get deploy,rs,po -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/deploy-xiuxian 5/5 5 5 2m23s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 version=v1
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/deploy-xiuxian-67bc8cf4ff 5 5 5 32s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 pod-template-hash=67bc8cf4ff,version=v1
replicaset.apps/deploy-xiuxian-9ddcfd7db 0 0 0 2m23s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 pod-template-hash=9ddcfd7db,version=v1
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-xiuxian-67bc8cf4ff-55zrp 1/1 Running 0 32s 10.100.203.175 worker232 <none> <none>
pod/deploy-xiuxian-67bc8cf4ff-ctwp9 1/1 Running 0 30s 10.100.203.177 worker232 <none> <none>
pod/deploy-xiuxian-67bc8cf4ff-j6qml 1/1 Running 0 32s 10.100.140.111 worker233 <none> <none>
pod/deploy-xiuxian-67bc8cf4ff-m9ml9 1/1 Running 0 31s 10.100.203.176 worker232 <none> <none>
pod/deploy-xiuxian-67bc8cf4ff-q2pf7 1/1 Running 0 32s 10.100.140.110 worker233 <none> <none>
[root@master231 deployments]# curl 10.100.140.111
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>yinzhengjie apps v2</title>
<style>
div img {
width: 900px;
height: 600px;
margin: 0;
}
</style>
</head>
<body>
<h1 style="color: red">凡人修仙传 v2 </h1>
<div>
<img src="2.jpg">
<div>
</body>
</html>
[root@master231 deployments]# kubectl delete -f 01-deploy-matchLabels-xiuxian.yaml
deployment.apps "deploy-xiuxian" deleted
[root@master231 deployments]#
[root@master231 deployments]# kubectl get deploy,rs,po -o wide
No resources found in default namespace.
2.2 基于matchLabels实战2
[root@master231 deployments]# cat 02-deploy-matchExpressions-xiuxian.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-xiuxian-matchexpressions
labels:
apps: xiuxian
spec:
replicas: 5
selector:
matchExpressions:
- key: version
values:
- v1
- v2
- v3
operator: In
template:
metadata:
labels:
version: v1
school: oldboyedu
class: linux96
spec:
containers:
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
name: xiuxian
[root@master231 deployments]#
[root@master231 deployments]# kubectl apply -f 02-deploy-matchExpressions-xiuxian.yaml
deployment.apps/deploy-xiuxian-matchexpressions created
[root@master231 deployments]# kubectl get deploy,rs,po -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/deploy-xiuxian-matchexpressions 5/5 5 5 2s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 version in (v1,v2,v3)
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/deploy-xiuxian-matchexpressions-9ddcfd7db 5 5 5 2s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 pod-template-hash=9ddcfd7db,version in (v1,v2,v3)
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-xiuxian-matchexpressions-9ddcfd7db-jq9t7 1/1 Running 0 2s 10.100.203.178 worker232 <none> <none>
pod/deploy-xiuxian-matchexpressions-9ddcfd7db-n76n8 1/1 Running 0 2s 10.100.140.112 worker233 <none> <none>
pod/deploy-xiuxian-matchexpressions-9ddcfd7db-p4jns 1/1 Running 0 2s 10.100.140.113 worker233 <none> <none>
pod/deploy-xiuxian-matchexpressions-9ddcfd7db-swthk 1/1 Running 0 2s 10.100.203.180 worker232 <none> <none>
pod/deploy-xiuxian-matchexpressions-9ddcfd7db-vzfjl 1/1 Running 0 2s 10.100.203.179 worker232 <none> <none>
[root@master231 deployments]# curl 10.100.203.180
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>yinzhengjie apps v1</title>
<style>
div img {
width: 900px;
height: 600px;
margin: 0;
}
</style>
</head>
<body>
<h1 style="color: green">凡人修仙传 v1 </h1>
<div>
<img src="1.jpg">
<div>
</body>
</html>
[root@master231 deployments]# vim 02-deploy-matchExpressions-xiuxian.yaml
[root@master231 deployments]#
[root@master231 deployments]# kubectl apply -f 02-deploy-matchExpressions-xiuxian.yaml
deployment.apps/deploy-xiuxian-matchexpressions configured
[root@master231 deployments]#
[root@master231 deployments]# kubectl get deployments.apps deploy-xiuxian-matchexpressions -o yaml | grep "image:"
- image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2
[root@master231 deployments]# kubectl get deploy,rs,po -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/deploy-xiuxian-matchexpressions 5/5 5 5 66s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 version in (v1,v2,v3)
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/deploy-xiuxian-matchexpressions-67bc8cf4ff 5 5 5 36s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 pod-template-hash=67bc8cf4ff,version in (v1,v2,v3)
replicaset.apps/deploy-xiuxian-matchexpressions-9ddcfd7db 0 0 0 66s xiuxian registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 pod-template-hash=9ddcfd7db,version in (v1,v2,v3)
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-xiuxian-matchexpressions-67bc8cf4ff-2ddwv 1/1 Running 0 36s 10.100.140.114 worker233 <none> <none>
pod/deploy-xiuxian-matchexpressions-67bc8cf4ff-cfzvk 1/1 Running 0 35s 10.100.203.182 worker232 <none> <none>
pod/deploy-xiuxian-matchexpressions-67bc8cf4ff-krvzm 1/1 Running 0 36s 10.100.140.115 worker233 <none> <none>
pod/deploy-xiuxian-matchexpressions-67bc8cf4ff-p2wfs 1/1 Running 0 36s 10.100.203.181 worker232 <none> <none>
pod/deploy-xiuxian-matchexpressions-67bc8cf4ff-xnrpl 1/1 Running 0 35s 10.100.203.183 worker232 <none> <none>
[root@master231 deployments]# curl 10.100.203.183
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>yinzhengjie apps v2</title>
<style>
div img {
width: 900px;
height: 600px;
margin: 0;
}
</style>
</head>
<body>
<h1 style="color: red">凡人修仙传 v2 </h1>
<div>
<img src="2.jpg">
<div>
</body>
</html>
五、Pod的服务发现Service之NodePort类型
1.编写资源清单
[root@master231 service]# cat 02-svc-NodePort-xiuxian.yaml
apiVersion: v1
kind: Service
metadata:
labels:
apps: xiuxian
name: svc-xiuxian-nodeport
spec:
type: NodePort
ports:
- port: 90
protocol: TCP
targetPort: 80
# 声明worker节点的转发的端口，默认的有效范围是: 30000-32767
nodePort: 30080
selector:
version: v1
[root@master231 service]# kubectl apply -f 02-svc-NodePort-xiuxian.yaml
service/svc-xiuxian-nodeport created
[root@master231 service]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.200.0.1 <none> 443/TCP 30h
rc-xiuxian ClusterIP 10.200.196.245 <none> 80/TCP 116m
svc-xiuxian ClusterIP 10.200.25.148 <none> 90/TCP 102m
svc-xiuxian-nodeport NodePort 10.200.21.38 <none> 90:30080/TCP 6s
2.访问测试
http://10.0.0.231:30080/
http://10.0.0.232:30080/
http://10.0.0.233:30080/
六、deploy，rs，svc，Pod之间的关系
本文来自博客园，作者：丁志岩，转载请注明原文链接：https://www.cnblogs.com/dezyan/p/18815919
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