创建资源对象实例

目录

• 创建资源对象实例
  • 创建namespaces
  • Rc/Rs/Deployment
    • deployment创建controllers
    • ReplicationController创建controllers
    • ReplicaSet创建controllers
  • 创建Service
    • 创建controller
    • 创建service(不与外部网络通信)
    • 创建service(与外部网络通信)
• Volume
  • emptyDir
  • hostPath
  • nfs共享存储
    • 准备nfs服务器(10.203.124.237)
    • 配置pod使用nfs挂载
    • 在同一个pod中挂载多个nfs目录
  • Configmap
    • 基于配置文件ConfigMap
    • 基于env ConfigMap
• DaemonSet
• Statefulset

创建资源对象实例

创建namespaces

root@master1:/k8s-data/yaml/namespaces# pwd
/k8s-data/yaml/namespaces

root@master1:/k8s-data/yaml/namespaces# cat danran-ns.yml 
apiVersion: v1 #API版本
kind: Namespace #类型为namespac
metadata:  #定义元数据
  name: danran
root@master1:/k8s-data/yaml/namespaces# kubectl apply -f danran-ns.yml 
namespace/danran created

root@master1:/k8s-data/yaml/namespaces# cat jevon-ns.yml 
apiVersion: v1 #API版本
kind: Namespace #类型为namespac
metadata:  #定义元数据
  name: jevon
root@master1:/k8s-data/yaml/namespaces# kubectl apply -f jevon-ns.yml 
namespace/jevon created

danran和jevon两个namespaces已创建

root@master1:/k8s-data/yaml/namespaces# kubectl get ns
NAME                   STATUS   AGE
danran                 Active   97s
default                Active   26h
jevon                  Active   3s
kube-node-lease        Active   26h
kube-public            Active   26h
kube-system            Active   26h
kubernetes-dashboard   Active   23h

Rc/Rs/Deployment

Replication Controller：副本控制器（selector = !=）
ReplicaSet：副本控制集，和副本控制器的区别是：对选择器的支 持（selector 还支持in notin） 
Deployment：比rs更高一级的控制器，除了有rs的功能之外，还 有很多高级功能,，比如说最重要的：滚动升级、回滚等 
    https://kubernetes.io/zh/docs/concepts/workloads/controllers/deployment/

deployment创建controllers

root@master1:/k8s-data/yaml/danran/case1# cat deployment.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
    name: nginx-deployment
    namespace: danran
spec:
  replicas: 2
  selector:
    #app: ng-deploy-80 #rc
    #matchLabels: #rs or deployment
    #  app: ng-deploy-80

    matchExpressions:
      - {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
    containers:
        - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
           - containerPort: 80
           
root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f deployment.yml 
deployment.apps/nginx-deployment configured  

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-6fd69d55d4-6dmlc   1/1     Running   0          7s
nginx-deployment-6fd69d55d4-rjwq2   1/1     Running   0          4s

查看指定容器的controler
root@master1:/kubernetes# kubectl describe pod nginx-deployment-6fd69d55d4-rjwq2 -n danran

root@master1:/k8s-data/yaml/danran/case1# kubectl delete -f deployment.yml 
deployment.apps "nginx-deployment" deleted

ReplicationController创建controllers

root@master1:/k8s-data/yaml/danran/case1# cat rc.yml 
apiVersion: v1  
kind: ReplicationController  
metadata:  
  name: ng-rc
  namespace: danran
spec:  
  replicas: 2
  selector:  
    app: ng-rc-80 
    #app1: ng-rc-81

  template:   
    metadata:  
      labels:  
        app: ng-rc-80
        #app1: ng-rc-81
    spec:  
      containers:  
      - name: ng-rc-80 
        image: harbor.linux.com/baseimages/nginx:1.14.2 
        ports:  
           - containerPort: 80

root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f rc.yml 
replicationcontroller/ng-rc created

root@master1:/kubernetes# kubectl get pod -n danran
NAME          READY   STATUS    RESTARTS   AGE
ng-rc-28pml   1/1     Running   0          24s
ng-rc-ltfk9   1/1     Running   0          24s

root@master1:/k8s-data/yaml/danran/case1# kubectl delete -f rc.yml 
replicationcontroller "ng-rc" deleted

ReplicaSet创建controllers

root@master1:/k8s-data/yaml/danran/case1# cat rs.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1 
kind: ReplicaSet
metadata:
  name: frontend
  namespace: danran
spec:
  replicas: 3
  selector:
    #matchLabels:
    #  app: ng-rs-80
matchExpressions:
      - {key: app, operator: In, values: [ng-rs-80,ng-rs-81]}
  template:
    metadata:
      labels:
        app: ng-rs-80
    spec:  
      containers:  
      - name: ng-rs-80 
        image: harbor.linux.com/baseimages/nginx:1.14.2 
        ports:  
            - containerPort: 80
            
root@master1:/k8s-data/yaml/danran/case1# kubectl apply -f rs.yml 
replicaset.apps/frontend created

root@master1:/kubernetes# kubectl get pod -n danran
NAME             READY   STATUS    RESTARTS   AGE
frontend-4zd77   1/1     Running   0          9m1s
frontend-drqts   1/1     Running   0          9m1s
frontend-wfqcq   1/1     Running   0          9m1s

查看指定容器的controler

root@master1:/kubernetes# kubectl describe pod frontend-wfqcq -n danran

创建Service

创建controller

root@master1:/k8s-data/yaml/danran/case2# cat 1-deploy_node.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: danran
spec:
  replicas: 1
  selector:
    #matchLabels: #rs or deployment
    #  app: ng-deploy3-80
    matchExpressions:
      - {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
      #nodeSelector:
      #  env: group1
      
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 1-deploy_node.yml 
deployment.apps/nginx-deployment created

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-6f48df4946-vp5ph   1/1     Running   0          19s

创建service(不与外部网络通信)

root@master1:/k8s-data/yaml/danran/case2# cat 2-svc_service.yml 
apiVersion: v1
kind: Service
metadata:
  name: ng-deploy-80 
  namespace: danran
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
    protocol: TCP
  type: ClusterIP
  selector:
    app: ng-deploy-80
    
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 2-svc_service.yml 
service/ng-deploy-80 created

root@master1:/kubernetes# kubectl get service -n danran
NAME           TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
ng-deploy-80   ClusterIP   172.16.224.0   <none>        80/TCP    100s

创建测试容器busybox

root@master1:/k8s-data/yaml/danran/case2# cat busybox.yaml
apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: danran  #default namespace的DNS
spec:
  containers:
  - image: harbor.linux.com/baseimages/busybox
    command:
      - sleep
      - "3600"
    imagePullPolicy: Always 
    name: busybox
  restartPolicy: Always
  
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f busybox.yaml 
pod/busybox created

在busybox容器中测试网络是否与创建的ng-deploy-80 service 互通

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
busybox                             1/1     Running   0          35s
nginx-deployment-6f48df4946-vp5ph   1/1     Running   0          14m

容器中可以正常解析service ng-deploy-80
root@master1:/kubernetes# kubectl exec -it busybox sh -n danran
/ # ping ng-deploy-80
PING ng-deploy-80 (172.16.224.0): 56 data bytes

创建service(与外部网络通信)

root@master1:/k8s-data/yaml/danran/case2# cat 3-svc_NodePort.yml 
apiVersion: v1
kind: Service
metadata:
  name: ng-deploy-80 
  namespace: danran
spec:
  ports:
  - name: http
    port: 81
    targetPort: 80
    nodePort: 30012
    protocol: TCP
  type: NodePort
  selector:
    app: ng-deploy-80
    
root@master1:/k8s-data/yaml/danran/case2# kubectl apply -f 3-svc_NodePort.yml 
service/ng-deploy-80 created

root@master1:/kubernetes# kubectl get service -n danran
NAME           TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
ng-deploy-80   NodePort   172.16.206.246   <none>        81:30012/TCP   21s

通过在浏览器中，访问node或master节点的30012端口，即可访问ng-deploy-80 Nginx Controller对应的Pod

Volume

https://kubernetes.io/zh/docs/concepts/storage/

• emptyDir：本地临时卷
• hostPath：本地卷
• nfs等：共享卷
• configmap: 配置文件

emptyDir

当 Pod 被分配给节点时，首先创建 emptyDir 卷，并且只要该 Pod 在该节点上运行，该卷就会存在。正如卷的名字所述，它最初是 空的。Pod 中的容器可以读取和写入 emptyDir 卷中的相同文件， 尽管该卷可以挂载到每个容器中的相同或不同路径上。当出于任 何原因从节点中删除 Pod 时，emptyDir 中的数据将被永久删除

root@master1:/k8s-data/yaml/danran/case3# cat deploy_empty.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: danran
spec:
  replicas: 1
  selector:
    matchLabels: #rs or deployment
      app: ng-deploy-80
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: /cache
          name: cache-volume
      volumes:
      - name: cache-volume
        emptyDir: {}
        
root@master1:/k8s-data/yaml/danran/case3# kubectl apply -f deploy_empty.yml 
deployment.apps/nginx-deployment created 

在容器中生成部分数据

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-764876fc9f-dkjfq   1/1     Running   0          3m22s
root@master1:/kubernetes# kubectl exec -it nginx-deployment-764876fc9f-dkjfq bash -n danran
root@nginx-deployment-764876fc9f-dkjfq:/# cd /cache/
root@nginx-deployment-764876fc9f-dkjfq:/cache# ls
root@nginx-deployment-764876fc9f-dkjfq:/cache# echo 123 > danran.txt
root@nginx-deployment-764876fc9f-dkjfq:/cache# ls
danran.txt

查看容器所在node节点上的目录是否有数据生成

查看容器所在的node节点
root@master1:/k8s-data/yaml/danran/case3# kubectl get pod -n danran -o wide
NAME                                READY   STATUS    RESTARTS   AGE    IP           NODE              NOMINATED NODE   READINESS GATES
nginx-deployment-764876fc9f-dkjfq   1/1     Running   0          6m6s   10.10.4.11   node2.linux.com   <none>           <none>

root@node2:~# find / -name danran.txt
/var/lib/kubelet/pods/eeacb4cb-f694-4f19-a31d-73628c26f2d6/volumes/kubernetes.io~empty-dir/cache-volume/danran.txt
root@node2:~# cat /var/lib/kubelet/pods/eeacb4cb-f694-4f19-a31d-73628c26f2d6/volumes/kubernetes.io~empty-dir/cache-volume/danran.txt
123

hostPath

hostPath 卷将主机节点的文件系统中的文件或目录挂载到集群中， pod删除的时候，卷不会被删除

root@master1:/k8s-data/yaml/danran/case4# cat deploy_hostPath.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: danran
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ng-deploy-80
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: /data/mysql
          name: data-volume
      volumes:
      - name: data-volume
        hostPath:
          path: /data/mysql
          
root@master1:/k8s-data/yaml/danran/case4# kubectl apply -f deploy_hostPath.yml 
deployment.apps/nginx-deployment created

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-68b7cf75b8-jlbpd   1/1     Running   0          31s

在容器中生成数据测试

root@master1:/kubernetes# kubectl get pod -n danran
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-68b7cf75b8-jlbpd   1/1     Running   0          31s

必须在mountPath路径下数据才能与宿主机同步
root@master1:/kubernetes# kubectl exec -it nginx-deployment-68b7cf75b8-jlbpd bash -n danran
root@nginx-deployment-68b7cf75b8-jlbpd:/# 
root@nginx-deployment-68b7cf75b8-jlbpd:/# cd /data/mysql/
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql# mkdir logs
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql# cd logs/
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql/logs# echo 12345qaz > a.txt
root@nginx-deployment-68b7cf75b8-jlbpd:/data/mysql/logs# pwd
/data/mysql/logs

在容器所在的宿主机上查看是否有数据

查看pod所在的宿主机
root@master1:/k8s-data/yaml/danran/case4# kubectl get pod -n danran -o wide
NAME                                READY   STATUS    RESTARTS   AGE    IP           NODE              NOMINATED NODE   READINESS GATES
nginx-deployment-68b7cf75b8-jlbpd   1/1     Running   0          3m4s   10.10.4.12   node2.linux.com   <none>           <none>

root@node2:~# ls /data/mysql/
logs
root@node2:~# cat /data/mysql/logs/a.txt 
12345qaz

nfs共享存储

nfs 卷允许将现有的 NFS（网络文件系统）共享挂载到您的容器中。 不像 emptyDir，当删除 Pod 时，nfs 卷的内容被保留，卷仅仅是 被卸载。这意味着 NFS 卷可以预填充数据，并且可以在 pod 之间 “切换”数据。 NFS 可以被多个写入者同时挂载。

准备nfs服务器(10.203.124.237)

root@ha1:~# apt install nfs-server

将/data/k8sdata 目录共享给其他主机
root@ha1:~# cat /etc/exports
/data/k8sdata *(rw,no_root_squash)
/data/danran *(rw,no_root_squash)

root@ha1:~# mkdir /data/k8sdata -p
root@ha1:~# mkdir /data/danran -p
root@ha1:~# systemctl restart nfs-server
root@ha1:~# systemctl enable nfs-server

root@ha1:/data/k8sdata# cat index.html 
web server

配置pod使用nfs挂载

root@master1:/k8s-data/yaml/danran/case5# cat deploy_nfs2.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment-site2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ng-deploy-81
  template:
    metadata:
      labels:
        app: ng-deploy-81
    spec:
      containers:
      - name: ng-deploy-81
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: /usr/share/nginx/html/mysite
          name: my-nfs-volume
      volumes:
      - name: my-nfs-volume
        nfs:
          server: 10.203.124.237
          path: /data/k8sdata

---
apiVersion: v1
kind: Service
metadata:
  name: ng-deploy-81
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
    nodePort: 30017
    protocol: TCP
  type: NodePort
  selector:
    app: ng-deploy-81
    
root@master1:/k8s-data/yaml/danran/case5# kubectl apply -f deploy_nfs2.yml 
deployment.apps/nginx-deployment-site2 created
service/ng-deploy-81 created

root@master1:/kubernetes# kubectl get pod
NAME                                      READY   STATUS    RESTARTS   AGE
nginx-7b466bcdb8-sbkqt                    1/1     Running   0          44h
nginx-deployment-site2-685f87bf5c-vxztk   1/1     Running   0          81s
tomcat-deployment-567999ddc-wrv5v         1/1     Running   0          43h

进入容器内查看nfs挂载目录
root@master1:/kubernetes# kubectl exec -it nginx-deployment-site2-685f87bf5c-vxztk bash
root@nginx-deployment-site2-685f87bf5c-vxztk:/# df  
Filesystem                   1K-blocks    Used Available Use% Mounted on
overlay                       20961280 3208024  17753256  16% /
tmpfs                            65536       0     65536   0% /dev
tmpfs                          4084052       0   4084052   0% /sys/fs/cgroup
/dev/mapper/vg00-rootvol      20961280 3208024  17753256  16% /etc/hosts
shm                              65536       0     65536   0% /dev/shm
10.203.124.237:/data/k8sdata  20961280 2511872  18449408  12% /usr/share/nginx/html/mysite
tmpfs                          4084052      12   4084040   1% /run/secrets/kubernetes.io/serviceaccount
tmpfs                          4084052       0   4084052   0% /proc/acpi
tmpfs                          4084052       0   4084052   0% /proc/scsi
tmpfs                          4084052       0   4084052   0% /sys/firmware

root@nginx-deployment-site2-685f87bf5c-vxztk:/# cat /usr/share/nginx/html/mysite/index.html
web server

浏览器访问nginx，测试数据是否为nfs目录的数据

在pod所在的node上确认是否挂载了nfs目录

root@master1:/usr/local/src/kubeadm/nginx# kubectl get pod -o wide
NAME                                      READY   STATUS    RESTARTS   AGE   IP           NODE              NOMINATED NODE   READINESS GATES
nginx-7b466bcdb8-sbkqt                    1/1     Running   0          44h   10.10.4.2    node2.linux.com   <none>           <none>
nginx-deployment-site2-685f87bf5c-t8wsb   1/1     Running   0          46s   10.10.3.12   node1.linux.com   <none>           <none>
tomcat-deployment-567999ddc-wrv5v         1/1     Running   0          43h   10.10.4.3    node2.linux.com   <none>           <none>

在同一个pod中挂载多个nfs目录

root@master1:/k8s-data/yaml/danran/case5# cat deploy_nfs.yml 
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment-site
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ng-deploy-80
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: /usr/share/nginx/html/mysite
          name: my-nfs-volume
        - mountPath: /data/danran
          name: danran-nfs-volume
      volumes:
      - name: my-nfs-volume
        nfs:
          server: 10.203.124.237
          path: /data/k8sdata
      - name: danran-nfs-volume
        nfs:
          server: 10.203.124.237
          path: /data/danran

---
apiVersion: v1
kind: Service
metadata:
  name: ng-deploy-80
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
    nodePort: 30016
    protocol: TCP
  type: NodePort
  selector:
    app: ng-deploy-80

root@master1:/k8s-data/yaml/danran/case5# kubectl apply -f deploy_nfs.yml 
deployment.apps/nginx-deployment-site created
service/ng-deploy-80 unchanged

在pod和pod所在的node中，确认是否否挂载了两个nfs目录

root@master1:/kubernetes# kubectl get pod -o wide
NAME                                     READY   STATUS    RESTARTS   AGE    IP           NODE              NOMINATED NODE   READINESS GATES
nginx-7b466bcdb8-sbkqt                   1/1     Running   0          44h    10.10.4.2    node2.linux.com   <none>           <none>
nginx-deployment-site-6d55cc99d6-vxcqc   1/1     Running   0          105s   10.10.4.14   node2.linux.com   <none>           <none>
tomcat-deployment-567999ddc-wrv5v        1/1     Running   0          43h    10.10.4.3    node2.linux.com   <none>           <none>

root@master1:/kubernetes# kubectl exec -it nginx-deployment-site-6d55cc99d6-vxcqc sh

Configmap

基于配置文件ConfigMap

配置Configmap 的yml文件
root@master1:/k8s-data/yaml/danran/case6# cat deploy_configmap.yml 
apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-config
data:
 default: |
    server {
       listen       80;
       server_name  www.mysite.com;
       index        index.html;

       location / {
           root /data/nginx/html;
           if (!-e $request_filename) {
               rewrite ^/(.*) /index.html last;
           }
       }
    }


---
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ng-deploy-80
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: /data/nginx/html
          name: nginx-static-dir
        - name: nginx-config
          mountPath:  /etc/nginx/conf.d
      volumes:
      - name: nginx-static-dir
        hostPath:
          path: /data/nginx/danran
      - name: nginx-config
        configMap:
          name: nginx-config
          items:
             - key: default
               path: mysite.conf

---
apiVersion: v1
kind: Service
metadata:
  name: ng-deploy-80
spec:
  ports:
  - name: http
    port: 81
    targetPort: 80
    nodePort: 30019
    protocol: TCP
  type: NodePort
  selector:
    app: ng-deploy-80
    
 
创建pod
root@master1:/k8s-data/yaml/danran/case6# kubectl apply -f deploy_configmap.yml 
configmap/nginx-config created
deployment.apps/nginx-deployment created
service/ng-deploy-80 created

root@master1:/kubernetes# kubectl get pod -o wide
NAME                                READY   STATUS    RESTARTS   AGE   IP           NODE              NOMINATED NODE   READINESS GATES
nginx-7b466bcdb8-sbkqt              1/1     Running   0          46h   10.10.4.2    node2.linux.com   <none>           <none>
nginx-deployment-64b664464f-k4j5p   1/1     Running   0          64s   10.10.3.13   node1.linux.com   <none>           <none>
tomcat-deployment-567999ddc-wrv5v   1/1     Running   0          45h   10.10.4.3    node2.linux.com   <none>           <none>
root@master1:/kubernetes# kubectl get service -o wide
NAME                    TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE   SELECTOR
danran-nginx-service    NodePort    172.16.175.123   <none>        80:30004/TCP   46h   app=nginx
danran-tomcat-service   NodePort    172.16.218.15    <none>        80:31794/TCP   45h   app=tomcat
kubernetes              ClusterIP   172.16.0.1       <none>        443/TCP        2d    <none>
ng-deploy-80            NodePort    172.16.135.46    <none>        81:30019/TCP   83s   app=ng-deploy-80

确认pod中是否有/etc/nginx/conf.d/mysite.conf配置文件

root@nginx-deployment-64b664464f-k4j5p:/# cat /etc/nginx/conf.d/mysite.conf 
server {
   listen       80;
   server_name  www.mysite.com;
   index        index.html;

   location / {
       root /data/nginx/html;
       if (!-e $request_filename) {
           rewrite ^/(.*) /index.html last;
       }
   }
}

基于env ConfigMap

root@master1:/k8s-data/yaml/danran/case6# cat deploy_configmapenv.yml 
apiVersion: v1
kind: ConfigMap

metadata:
  name: nginx-config
data:
  username: user1


---
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ng-deploy-80
  template:
    metadata:
      labels:
        app: ng-deploy-80
    spec:
      containers:
      - name: ng-deploy-80
        image: harbor.linux.com/baseimages/nginx:1.14.2
        env:
        - name: MY_USERNAME
          valueFrom:
            configMapKeyRef:
              name: nginx-config
              key: username
        ports:
        - containerPort: 80

DaemonSet

https://kubernetes.io/zh/docs/concepts/workloads/controllers/daemonset/

root@master1:/k8s-data/yaml/danran# vim daemonset.yml 

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd-elasticsearch
  namespace: kube-system
  labels:
    k8s-app: fluentd-logging
spec:
  selector:
    matchLabels:
      name: fluentd-elasticsearch
  template:
    metadata:
      labels:
        name: fluentd-elasticsearch
    spec:
      tolerations:
      # this toleration is to have the daemonset runnable on master nodes
      # remove it if your masters can't run pods
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      containers:
      - name: fluentd-elasticsearch
        image: quay.io/fluentd_elasticsearch/fluentd:v2.5.2
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: varlog
          mountPath: /var/log
        - name: varlibdockercontainers
          mountPath: /var/lib/docker/containers
          readOnly: true
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log
      - name: varlibdockercontainers
        hostPath:
          path: /var/lib/docker/containers
          

root@master1:/k8s-data/yaml/danran# kubectl apply -f daemonset.yaml             

Statefulset

https://kubernetes.io/zh/docs/concepts/workloads/controllers/statefulset/

• Why：为了解决有状态服务的问题
• What：它所管理的Pod拥有固定的Pod名称，主机名，启停顺序
• How： 创建一个statefulset类型的pod，并指定serviceName，创建headless类型的svc