centos7 搭建 kubernetes1.16.7 集群 II (ingress)

在 centos7 搭建 kubernetes1.16.7 集群 I  中,环境搭建进度如下

k8s-master :192.168.1.127

k8s-node1  :192.168.1.122

k8s-node2  :192.168.1.132

此次将搭建 ingress ,并用 mediawiki 做测试。

拉取 mediawiki

# 每个节点都要拉取
docker pull mufengziyu/mediawiki:1.18.0

下载 Ingress 相关 yaml

# 下载创建 Ingress 用到的相关 yaml 文件
ingress-nginx for file in namespace.yaml configmap.yaml rbac.yaml tcp-services-configmap.yaml with-rbac.yaml udp-services-configmap.yaml default-backend.yaml; do wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.17.0/deploy/$file; done

下载的 yaml 做相应修改

修改 yaml

# 修改 with-rbac.yaml
# 如下,在serviceAccountName上方添加hostNetwork: true:
spec:
      hostNetwork: true
      serviceAccountName: nginx-ingress-serviceaccount
      containers:
        - name: nginx-ingress-controller
          image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.14.0
          args:
            - /nginx-ingress-controller
            - --default-backend-service=$(POD_NAMESPACE)/default-http-backend
            - --configmap=$(POD_NAMESPACE)/nginx-configuration
            - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services
            - --udp-services-configmap=$(POD_NAMESPACE)/udp-services
            - --annotations-prefix=nginx.ingress.kubernetes.io

 

#修改 with-rbac.yaml
# 在其env部分加入如下环境变量

       env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
            - name: KUBERNETES_MASTER 
              value: http://192.168.56.101:8080

创建 Ingress-controller

ingress-nginx
for file in namespace.yaml configmap.yaml rbac.yaml tcp-services-configmap.yaml with-rbac.yaml udp-services-configmap.yaml default-backend.yaml;
do kubectl apply -f $file; done

创建后查看 pod

[root@k8s-node1 ~]# kubectl get pod -n ingress-nginx -o wide
NAME                                       READY   STATUS    RESTARTS   AGE   IP              NODE        NOMINATED NODE   READINESS GATES
default-http-backend-7b7fd455bd-ptsrt      1/1     Running   3          39h   10.244.1.7      k8s-node1   <none>           <none>
nginx-ingress-controller-657bbdc77-l4jps   1/1     Running   5          39h   192.168.1.122   k8s-node1   <none>           <none>

创建自定义 Ingress

# 创建 deployment , service 
[root@k8s-master ~]# vi yaml/media.yaml [root@k8s-master ~]# cat yaml/media.yaml apiVersion: apps/v1 kind: Deployment metadata: labels: app: mediawiki-pod name: mediawiki-pod spec: replicas: 1 selector: matchLabels: app: mediawiki-pod template: metadata: labels: app: mediawiki-pod spec: containers: - image: mufengziyu/mediawiki:1.18.0 name: mediawiki-pod ports: - containerPort: 80 --- apiVersion: v1 kind: Service metadata: name: mediawiki-pod-service labels: app: mediawiki-pod # 对应pod得label spec: type: NodePort # 类型ExternalName, ClusterIP, NodePort, and LoadBalancer ports: - port: 80 targetPort: 80 nodePort: 30002 # 端口范围【30000-32767】 selector: app: mediawiki-pod

[root@k8s-master ~] kubectl apply -f media.yaml

 

# 创建 ingress 
# host :ingress-controller 所在节点的域名,不能是 ip
# 建立一个本地DNS服务即可
# serviceName 和 servicePort 分别对应 service 的 Name 和 port
[root@k8s-master ~]# vi yaml/media-ingress.yaml
[root@k8s-master ~]# cat yaml/media-ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: mediawiki-ingress
  namespace: default

spec:
  rules:
  - host: k8s-node1.com 
    http:
      paths:
      - path: /
        backend:
          serviceName: mediawiki-pod-service
          servicePort: 80

[root@k8s-master ~]# kubectl apply -f media-ingress.yaml
# 修改 本地 dsn 服务
# 打开 /etc/host,插入 ip 域名 映射 # 我添加的如下 192.168.1.122 k8s-node1.com 192.168.1.127 k8s-master.com 192.168.1.132 k8s-node2.com

 

查看结果

[root@k8s-master ~]# kubectl get pod --all-namespaces
NAMESPACE       NAME                                       READY   STATUS    RESTARTS   AGE
default         mediawiki-pod-74c76684d-z9ss5              1/1     Running   1          16h
ingress-nginx   default-http-backend-7b7fd455bd-ptsrt      1/1     Running   3          39h
ingress-nginx   nginx-ingress-controller-657bbdc77-l4jps   1/1     Running   5          39h
kube-system     coredns-58cc8c89f4-955zb                   1/1     Running   12         2d19h
kube-system     coredns-58cc8c89f4-bp746                   1/1     Running   12         2d19h
kube-system     etcd-k8s-master                            1/1     Running   5          2d19h
kube-system     kube-apiserver-k8s-master                  1/1     Running   5          2d19h
kube-system     kube-controller-manager-k8s-master         1/1     Running   5          2d19h
kube-system     kube-flannel-ds-amd64-5f28r                1/1     Running   3          41h
kube-system     kube-flannel-ds-amd64-9s6v2                1/1     Running   4          41h
kube-system     kube-flannel-ds-amd64-fvrmj                1/1     Running   5          2d19h
kube-system     kube-proxy-cddqh                           1/1     Running   4          41h
kube-system     kube-proxy-d8sxd                           1/1     Running   5          2d19h
kube-system     kube-proxy-gfvhf                           1/1     Running   3          41h
kube-system     kube-scheduler-k8s-master                  1/1     Running   5          2d19h
[root@k8s-master ~]# kubectl get deployment
NAME            READY   UP-TO-DATE   AVAILABLE   AGE
mediawiki-pod   1/1     1            1           16h
[root@k8s-master ~]# kubectl get svc
NAME                    TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes              ClusterIP   10.96.0.1      <none>        443/TCP        2d19h
mediawiki-pod-service   NodePort    10.98.86.108   <none>        80:30002/TCP   16h
[root@k8s-master ~]# kubectl get ingress
NAME                HOSTS           ADDRESS   PORTS   AGE
mediawiki-ingress   k8s-node1.com             80      15h
# 访问 服务
# 未添加数据库,所以显示 这个页面
[root@k8s-master ~]# curl k8s-node1.com
<h1>Sorry! This site is experiencing technical difficulties.</h1><p>Try waiting a few minutes and reloading.</p><p><small>(Can't contact the database server: <span dir="ltr">No route to host (192.168.1.200)</span>)</small></p><hr /><div style="margin: 1.5em">You can try searching via Google in the meantime.<br />
<small>Note that their indexes of our content may be out of date.</small></div>
<!-- SiteSearch Google -->
<form method="get" action="http://www.google.com/search" id="googlesearch">
    <input type="hidden" name="domains" value="" />
    <input type="hidden" name="num" value="50" />
    <input type="hidden" name="ie" value="UTF-8" />
    <input type="hidden" name="oe" value="UTF-8" />

    <input type="text" name="q" size="31" maxlength="255" value="" />
    <input type="submit" name="btnG" value="Search" />
  <div>
    <input type="radio" name="sitesearch" id="gwiki" value="" checked="checked" /><label for="gwiki">test</label>
    <input type="radio" name="sitesearch" id="gWWW" value="" /><label for="gWWW">WWW</label>
  </div>
</form>

 

若用windows访问,修改 C:\Windows\System32\drivers\etc\hosts 文件,加入相应域名 ip 映射

测试结果

centos7 搭建 kubernetes1.16.7 集群 II (ingress)

 

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