Today is K8S combat - build Django project, the final say. 5 in front of us step by step to build a django project by k8s, by taking into account the actual production environment, we added the initialization function, building automation functions, shared storage, data encryption, monitoring program, log program. From scratch, we go together again. The last to speak, I will bring everyone to use existing resources to achieve the simplest continuous build.

Continuous build

design

gitlab+jenkins+node+dockerfile+k8s

gitlab as a warehouse, provided the trigger Jenkins, node as execution node, dockerfile mirror production, k8s build resources.

Automated build environment

You need to refer to my previous tutorial to build gitlab + jenkins create an automated build environment. Make sure your automated build environment is normal!

Creating gitlab project

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Create a project, where the project name is the name of the next task jenkins, by setting a good gitlab address, you can get the code to change gitlab, triggering jenkins task.

Write Jenkins triggered task

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A new job, then select a node can be constructed.

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I've built before the relevant image, this time without having to rebuild the mirror.

Verification node node

Here there is only a need to ensure that node node java environment, docker environment, k8s environment.

Verify Continuous Integration

By updating gitlab related project code, jenkins detected gitlab code changes, started shell task on selected machine execution, execution of the construction project django.

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As can be seen from the console output resources have been created, and then go visit the project address and found items can be a normal visit.

If you want to reproduce these, I recommend "" "" "" "Before you must read." There I learned to code on gitlab is django_deploy.yaml and django_nfs.yaml 3.0 version of django projects. If you need to test django project version 4.0, you need to upload their own resources. Finally, attach the relevant code django_polls engineering structures and the directory gitlab.

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django_deploy.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: mysql
  name: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      initContainers:
      - name: mysql-init
        image: busybox
        imagePullPolicy: IfNotPresent
        command:
          - sh
          - "-c"
          - |
            set -ex
            cat > /start_script/mysql_init.sh <<EOF
            #!/bin/bash
            sed -i "/log-error/iskip-grant-tables" /etc/my.cnf
            systemctl restart mysqld
            sleep 50
            mysql -uroot -p123qwe -e "CREATE DATABASE polls DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;"
            mysql -uroot -p123qwe -e "use mysql;"
            mysql -uroot -p123qwe -e "grant all privileges  on *.* to root@'%' identified by "123qwe";"
            mysql -uroot -p123qwe -e "flush privileges;"
            systemctl restart mysqld
            EOF
            chmod +x /start_script/mysql_init.sh
        volumeMounts:
        - name: mysql-initdb
          mountPath: /start_script
      volumes:
      - name: mysql-initdb
        persistentVolumeClaim:
          claimName: mypvc1
      - name: mysql-data
        persistentVolumeClaim:
          claimName: mysqlpvc
      containers:
      - image: centos7:mysql3
        name: mysql
        imagePullPolicy: IfNotPresent
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: 123qwe
        readinessProbe:
          exec:
            command:
            - /bin/sh
            - "-c"
            - MYSQL_PWD="${MYSQL_ROOT_PASSWORD}"
            - mysql -h 127.0.0.1 -u root -p $MYSQL_PWD -e "SELECT 1"
          initialDelaySeconds: 10
          timeoutSeconds: 1
          successThreshold: 1
          failureThreshold: 3
          periodSeconds: 5
        volumeMounts:
        - name: mysql-initdb
          mountPath: /start_script
        - name: mysql-data
          mountPath: /raiddisk        
          


apiVersion: v1
kind: Service
metadata:
  name: mysql-svc
spec:
  selector:
    app: mysql
  clusterIP: 10.101.1.1
  ports:
  - protocol: TCP
    port: 3306
    targetPort: 3306




apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: django
  name: django
spec:
  replicas: 1
  selector:
    matchLabels:
      app: django
  template:
    metadata:
      labels:
        app: django
    spec:
      initContainers:
      - name: django-init
        image: busybox
        imagePullPolicy: IfNotPresent
        command:
          - sh
          - "-c"
          - |
            set -ex
            cat > /start_script/django_init.sh <<EOF
            #!/bin/bash
            mkdir /root/django
            cd /root/django
            git clone https://github.com/cuigelasi/learn_django.git
            cd /root/django/learn_django
            git checkout -t origin/polls
            sed -i "s/172.10.1.2/10.101.1.1/" learn_django/settings.py
            sleep 60
            python manage.py makemigrations
            python manage.py migrate
            echo "from django.contrib.auth.models import User; User.objects.create_superuser('admin', '[email protected]', '123qwe')" | python manage.py shell
            python manage.py runserver 0.0.0.0:8000
            EOF
            chmod +x /start_script/django_init.sh
        volumeMounts:
        - name: django-initdb
          mountPath: /start_script
      containers:
      - image: centos7:django3
        name: django
        volumeMounts:
        - name: django-initdb
          mountPath: /start_script
        readinessProbe:
          exec:
            command:
            - cat
            - /root/django/learn_django/learn_django/settings.py
          initialDelaySeconds: 10
          periodSeconds: 5
      volumes:
      - name: django-initdb
        persistentVolumeClaim:
          claimName: mypvc1
      - name: django-data
        persistentVolumeClaim:
          claimName: djangopvc




apiVersion: v1
kind: Service
metadata:
  name: django-svc
spec:
  type: NodePort
  selector:
    app: django
  clusterIP: 10.101.1.2
  ports:
  - protocol: TCP
    nodePort: 30008
    port: 8000
    targetPort: 8000

django_nfs.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mypv1
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: mynfs
  nfs:
    path: /nfs-share
    server: 172.16.2.237



apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mypvc1
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: mynfs




apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysqlpv
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: mysqlnfs
  nfs:
    path: /mysql-share
    server: 172.16.2.237

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysqlpvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: mysqlnfs

---

apiVersion: v1
kind: PersistentVolume
metadata:
  name: djangopv
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: djangonfs
  nfs:
    path: /django-share
    server: 172.16.2.237

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: djangopvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: djangonfs

Conclusion

K8S combat - build Django project has been successfully completed. Thank you for your support all the way, as an IT person, every day, waiting to learn endless knowledge, I believe Him, and strive to learn there is always a chance to showcase their talents.

Original: Big Box K8S combat - -06- continuous build project to build Django

K8S combat - -06- continuous build project to build Django