#k8s构建python应用(django)

######k8s构建python应用(django)
mkdir -p pydemo && cd pydemo


cat  >Dockerfile <<EOF
FROM centos:6.8

RUN mkdir -p /data/soft && cd /data/soft
RUN yum install -y vim net-tools zip wget curl python-setuptools gcc unzip zlib zlib-devel openssh-clients tree crontabs

RUN yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel expat-devel

RUN [ "$(/usr/bin/python -V 2>&1 |awk '{print $2}')" != "2.7.15" ] && ([ ! -e Python-2.7.15.tgz ] && wget http://indoor.xxxx.com/download/centos/Python-2.7.15.tgz )  && tar zxf Python-2.7.15.tgz && cd Python-2.7.15 && ./configure && make && make install && mv -f /usr/bin/python /usr/bin/python2.6 && ln -sf /usr/local/bin/python2.7 /usr/bin/python && sed -i 's/^#!\/usr\/bin\/python$/#!\/usr\/bin\/python2.6/g' /usr/bin/yum

RUN yum install -y python-setuptools

RUN [ ! -e /usr/local/bin/pip -a ! -e /usr/bin/pip ] && (curl -sl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && python get-pip.py)

RUN pip install django==1.9.7
RUN pip install pymysql
RUN pip install python-crontab
RUN pip install pexpect
RUN pip install dwebsocket==0.4.2
RUN pip install chardet
RUN pip install psutil
RUN pip install paramiko

RUN cd /data && django-admin.py startproject pydir  && tree -if

EXPOSE 8080

CMD service crond start && python /data/pydir/manage.py makemigrations --merge  && python /data/pydir/manage.py migrate && python /data/pydir/manage.py runserver 0.0.0.0:8080
EOF

#############################构建镜像
docker build . -t k.xxxx.com:5000/py-web6.8:0

#############################上传到镜像仓库
docker push k.xxxx.com:5000/py-web6.8:0

##############################k8s 启动服务

cat >pydemo.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
  name: pydemo
  namespace: default
spec:
  selector:
    app: pydemo
  ports:
  - port: 80
    targetPort: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: pydemo
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pydemo
  template:
    metadata:
      labels:
        app: pydemo
    spec:
      containers:
      - name: pydemo
        image: k.xxxx.com:5000/py-web6.8:0
        ports:
        - containerPort: 8080
        volumeMounts:
            - name: pydir
              mountPath: /data/pydir
      volumes:
        - name: pydir
          hostPath:
            path: /data/pydir/vpnmgt
            
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-pydemo
  namespace: default
  annotations: 
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: vpn.testweb.com 
    http:
      paths:
      - path: /
        backend:
          serviceName: pydemo
          servicePort: 80
EOF

kubectl apply -f pydemo.yaml

kubectl get pods -o wide

###
kubectl describe pod $(kubectl get pods |grep pydemo |awk '{print $1}')

####查看日志
kubectl logs -f $(kubectl get pods |grep pydemo |awk '{print $1}')

####
kubectl get ingress