k8s集羣部署python+django項目

一、環境說明

操作系統：centos7
kubernetes：16.0
docker：18.06

主機名	內網地址	公網地址	類型
k8s:master	172.16.32.3	129.204.91.19	masters
k8s-none01	172.16.32.4	129.204.107.75	nodes
k8s-none02	172.16.32.9	129.204.2.2	nodes
mysql	172.16.32.9	129.204.2.2	nodes
鏡像倉庫地址	ccr.ccs.tencentyun.com		registry

二、環境檢查

[root@k8s-master ~]# kubectl get node
NAME         STATUS   ROLES    AGE   VERSION
k8s-master   Ready    master   15m   v1.16.0
k8s-node01   Ready    <none>   14m   v1.16.0
k8s-node02   Ready    <none>   13m   v1.16.0
[root@k8s-master ~]# kubectl get pod 
No resources found in default namespace.
[root@k8s-master ~]# kubectl get namespace
NAME              STATUS   AGE
default           Active   15m
kube-node-lease   Active   15m
kube-public       Active   15m
kube-system       Active   15m
[root@k8s-master python]# mysql -udevops1 -p1234 -h172.16.32.9 -e "show databases;"      
+--------------------+
| Database           |
+--------------------+
| information_schema |
| devops1            |
| test               |
+--------------------+
[root@k8s-master ~]# cat /etc/docker/daemon.json
{"registry-mirrors": ["https://f1z25q5p.mirror.aliyuncs.com"],
"insecure-registries":[ "ccr.ccs.tencentyun.com" ],
  "exec-opts": ["native.cgroupdriver=systemd"]
}
[root@k8s-node02~]# cat /etc/docker/daemon.json
{"registry-mirrors": ["https://f1z25q5p.mirror.aliyuncs.com"],
"insecure-registries":[ "ccr.ccs.tencentyun.com" ],
  "exec-opts": ["native.cgroupdriver=systemd"]
}
[root@k8s-node02~]# cat /etc/docker/daemon.json
{"registry-mirrors": ["https://f1z25q5p.mirror.aliyuncs.com"],
"insecure-registries":[ "ccr.ccs.tencentyun.com" ],
  "exec-opts": ["native.cgroupdriver=systemd"]
}

三、克隆項目

[root@k8s-master ~]# mkdir -p /data/python
[root@k8s-master ~]# cd /data/python/
[root@k8s-master python]# yum -y install git >/dev/null
[root@k8s-master python]# git clone -b dev1 https://gitee.com/mydoyou/devops.git
Cloning into 'devops'...
Username for 'https://gitee.com': [email protected]
Password for 'https://[email protected]@gitee.com': 
remote: Enumerating objects: 2289, done.
remote: Counting objects: 100% (2289/2289), done.
remote: Compressing objects: 100% (1779/1779), done.
remote: Total 2289 (delta 704), reused 1937 (delta 452), pack-reused 0
Receiving objects: 100% (2289/2289), 18.22 MiB | 4.21 MiB/s, done.
Resolving deltas: 100% (704/704), done.

四、項目鏡像準備

[root@k8s-master python]# pwd
/data/python
[root@k8s-master python]# cat Dockerfile 
FROM python:3.6
COPY devops/requirements.txt /data/devops/requirements.txt
WORKDIR /data/devops
RUN pip install -r requirements.txt -i https://mirrors.aliyun.com/pypi/simple/


[root@k8s-master python]# docker build -t python-templete:3.6 .
Sending build context to Docker daemon  58.47MB
Step 1/4 : FROM python:3.6
 ---> 1daf62e8cab5
Step 2/4 : COPY devops/requirements.txt /data/devops/requirements.txt
Successfully tagged python-templete:3.6

[root@k8s-master python]# docker  login -u919497370 -pxxxx! ccr.ccs.tencentyun.com
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded


[root@k8s-master python]# docker tag python-templete:3.6  ccr.ccs.tencentyun.com/carl-2020/kubernetes:templata
[root@k8s-master python]# docker push ccr.ccs.tencentyun.com/carl-2020/kubernetes:templata

五、構建項目鏡像

#修改Dockerfle文件
[root@k8s-master python]# cat Dockerfile 
FROM ccr.ccs.tencentyun.com/carl-2020/kubernetes:templata
COPY devops /data/devops/
WORKDIR /data/devops
RUN python manage.py migrate
EXPOSE 7000
CMD ["python", "manage.py", "runserver", "0.0.0.0:7000"]
[root@k8s-master python]# docker build -t ccr.ccs.tencentyun.com/carl-2020/kubernetes:pro-v1 .
[root@k8s-master python]# docker push ccr.ccs.tencentyun.com/carl-2020/kubernetes:pro-v1

六、在k8s集羣上部署項目

[root@k8s-master python]# kubectl create secret docker-registry  registry-auth --docker-username=919497370 --docker-password=xxxx --docker-server=ccr.ccs.tencentyun.com
[root@k8s-master python]# kubectl get secret
NAME                  TYPE                                  DATA   AGE
default-token-5455s   kubernetes.io/service-account-token   3      61m
registry-auth         kubernetes.io/dockerconfigjson        1      31m
[root@k8s-master python]# cat deploy.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: pro-v1
  name: pro-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pro-v1
  template:
    metadata:
      labels:
        app: pro-v1
    spec:
      imagePullSecrets:
      - name: "registry-auth"
      containers:
      - image: ccr.ccs.tencentyun.com/carl-2020/kubernetes:pro-v1
        name: pro-v1
        resources: {}


[root@k8s-master python]# kubectl get pod  
NAME                      READY   STATUS        RESTARTS   AGE
pro-v1-5854697c78-8z7kw   1/1     Running       0          108s

[root@k8s-master python]# cat service.yaml 
apiVersion: v1
kind: Service
metadata:
  labels:
    app: pro-v1
  name: pro-v1
spec:
  ports:
  - port: 7000
    protocol: TCP
    targetPort: 7000
#    nodePort: 30019  #自定義nodeport的端口
  selector:
    app: pro-v1
#  type: NodePort
[root@k8s-master python]# kubectl apply -f service.yaml
[root@k8s-master python]# kubectl get svc      
NAME         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)    AGE
kubernetes   ClusterIP   10.1.0.1      <none>        443/TCP    73m
pro-v1       ClusterIP   10.1.58.147   <none>        7000/TCP   40s

# 集羣內使用集羣ip訪問	
[root@k8s-master python]# curl 10.1.58.147:7000/login/login

七、使用ingress-nginx提供外部訪問

[root@k8s-master python]# cat mandatory.yaml 
apiVersion: v1
kind: Namespace
metadata:
  name: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---

kind: ConfigMap
apiVersion: v1
metadata:
  name: nginx-configuration
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
kind: ConfigMap
apiVersion: v1
metadata:
  name: tcp-services
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
kind: ConfigMap
apiVersion: v1
metadata:
  name: udp-services
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nginx-ingress-serviceaccount
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: nginx-ingress-clusterrole
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
rules:
  - apiGroups:
      - ""
    resources:
      - configmaps
      - endpoints
      - nodes
      - pods
      - secrets
    verbs:
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - services
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - events
    verbs:
      - create
      - patch
  - apiGroups:
      - "extensions"
      - "networking.k8s.io"
    resources:
      - ingresses
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - "extensions"
      - "networking.k8s.io"
    resources:
      - ingresses/status
    verbs:
      - update

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: Role
metadata:
  name: nginx-ingress-role
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
rules:
  - apiGroups:
      - ""
    resources:
      - configmaps
      - pods
      - secrets
      - namespaces
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - configmaps
    resourceNames:
      # Defaults to "<election-id>-<ingress-class>"
      # Here: "<ingress-controller-leader>-<nginx>"
      # This has to be adapted if you change either parameter
      # when launching the nginx-ingress-controller.
      - "ingress-controller-leader-nginx"
    verbs:
      - get
      - update
  - apiGroups:
      - ""
    resources:
      - configmaps
    verbs:
      - create
  - apiGroups:
      - ""
    resources:
      - endpoints
    verbs:
      - get

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: RoleBinding
metadata:
  name: nginx-ingress-role-nisa-binding
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: nginx-ingress-role
subjects:
  - kind: ServiceAccount
    name: nginx-ingress-serviceaccount
    namespace: ingress-nginx

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: nginx-ingress-clusterrole-nisa-binding
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: nginx-ingress-clusterrole
subjects:
  - kind: ServiceAccount
    name: nginx-ingress-serviceaccount
    namespace: ingress-nginx

---

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: nginx-ingress-controller
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: ingress-nginx
      app.kubernetes.io/part-of: ingress-nginx
  template:
    metadata:
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
      annotations:
        prometheus.io/port: "10254"
        prometheus.io/scrape: "true"
    spec:
      hostNetwork: true
      serviceAccountName: nginx-ingress-serviceaccount
      nodeSelector:
        kubernetes.io/os: linux
      containers:
        - name: nginx-ingress-controller
          image: registry.aliyuncs.com/google_containers/nginx-ingress-controller:0.30.0
          args:
            - /nginx-ingress-controller
            - --configmap=$(POD_NAMESPACE)/nginx-configuration
            - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services
            - --udp-services-configmap=$(POD_NAMESPACE)/udp-services
            - --publish-service=$(POD_NAMESPACE)/ingress-nginx
            - --annotations-prefix=nginx.ingress.kubernetes.io
          securityContext:
            allowPrivilegeEscalation: true
            capabilities:
              drop:
                - ALL
              add:
                - NET_BIND_SERVICE
            # www-data -> 101
            runAsUser: 101
          env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
          ports:
            - name: http
              containerPort: 80
              protocol: TCP
            - name: https
              containerPort: 443
              protocol: TCP
          livenessProbe:
            failureThreshold: 3
            httpGet:
              path: /healthz
              port: 10254
              scheme: HTTP
            initialDelaySeconds: 10
            periodSeconds: 10
            successThreshold: 1
            timeoutSeconds: 10
          readinessProbe:
            failureThreshold: 3
            httpGet:
              path: /healthz
              port: 10254
              scheme: HTTP
            periodSeconds: 10
            successThreshold: 1
            timeoutSeconds: 10
          lifecycle:
            preStop:
              exec:
                command:
                  - /wait-shutdown

---

apiVersion: v1
kind: LimitRange
metadata:
  name: ingress-nginx
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  limits:
  - min:
      memory: 90Mi
      cpu: 100m
    type: Container```


[root@k8s-master python]# kubectl apply -f mandatory.yaml            
[root@k8s-master python]# cat ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: pro-v1
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: pro-v1.mydoyou.cn
    http:
      paths:
      - path: 
        backend:
          serviceName: pro-v1
          servicePort: 7000
[root@k8s-master python]# kubectl apply -f ingress.yaml
ingress.extensions/pro-v1 created    
[root@k8s-master python]# kubectl get ingress
NAME     HOSTS               ADDRESS   PORTS   AGE
pro-v1   pro-v1.mydoyou.cn             80      15m
[root@k8s-master python]# kubectl get pod -n ingress-nginx -o wide
NAME                                        READY   STATUS    RESTARTS   AGE   IP            NODE         NOMINATED NODE   READINESS GATES
nginx-ingress-controller-5c47696787-cwmdx   1/1     Running   0          24m   172.16.32.9   k8s-node02   <none>           <none>
nginx-ingress-controller-kwgq2              1/1     Running   0          23m   172.16.32.4   k8s-node01   <none>           <none>
nginx-ingress-controller-ldjns              0/1     Pending   0          23m   <none>        <none>       <none>           <none>                

八、添加域名解析，並使用域名進行訪問系統