容器化案例二:Python服务容器化

公司的AI项目和运维项目基本都是Python项目，这里记录下Python项目的容器化知识。

Dockerfile文件编写

FROM python:3.6.8-slim

LABEL Maintainer="[email protected]" \
      Description="Python Project based on Alpine Linux."

# Enable unbuffered logging
ENV PYTHONUNBUFFERED=1

# Enable Profiler
ENV ENABLE_PROFILER=1


RUN set -x \
    && echo "deb http://mirrors.aliyun.com/debian/ stretch main non-free contrib" > /etc/apt/sources.list \
    && echo "deb http://mirrors.aliyun.com/debian/ stretch-proposed-updates main non-free contrib" >> /etc/apt/sources.list \
    && echo "deb-src http://mirrors.aliyun.com/debian/ stretch main non-free contrib" >> /etc/apt/sources.list \
    && echo "deb-src http://mirrors.aliyun.com/debian/ stretch-proposed-updates main non-free contrib" >> /etc/apt/sources.list \
    && apt-get update \
    && apt-get install -y --no-install-recommends --no-install-recommends curl telnet net-tools g++ \
    && rm -rf /var/lib/apt/lists/*

# get packages
COPY requirements.txt .

RUN pip install --upgrade pip -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

RUN pip install -r requirements.txt -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

WORKDIR /data/source/

COPY . .

RUN \cp ${project_name}/_settings_prod.py ${project_name}/settings.py

RUN sed -i '/if query is not None:/d' /usr/local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py && \
    sed -i '/query = query.decode/d' /usr/local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py

EXPOSE 9999

ENTRYPOINT [ "python", "manage.py", "runserver","0.0.0.0:9999" ]

Deployment及Service文件编写

{{$MODULE := "serve" }}
{{$TRUE_APP_NAME := (printf "%v-%v" .Env.FLOW_STANDARD_NAME $MODULE)}}


---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{$TRUE_APP_NAME}}-deploy
  labels:
    rd: {{.Env.CMP_RD}}
    app: {{.Env.FLOW_STANDARD_NAME}}
    project-name: {{.Env.FLOW_PROJECT_NAME}}
    module: {{$MODULE}}
spec:
  replicas: {{.Env.D_STATUS_REPLICAS}}
  selector:
    matchLabels:
      app: {{.Env.FLOW_STANDARD_NAME}}
      project-name: {{.Env.FLOW_PROJECT_NAME}}
      module: {{$MODULE}}
  template:
    metadata:
      annotations:
        alibabacloud.com/burst-resource: eci
      labels:
        rd: {{.Env.CMP_RD}}
        app: {{.Env.FLOW_STANDARD_NAME}}
        project-name: {{.Env.FLOW_PROJECT_NAME}}
        module: {{$MODULE}}
    spec:
      dnsConfig:
        options:
          - name: ndots
            value: "3"
      imagePullSecrets:
        - name: harbor-registry
      containers:
        - name: serve
          image: {{.Env.IMAGE_NAME}}
          imagePullPolicy: Always
          readinessProbe:
            tcpSocket:
              port: {{.Env.CMP_PORT}}
            initialDelaySeconds: 15
            periodSeconds: 10
            timeoutSeconds: 1
            successThreshold: 1
            failureThreshold: 30
          env:
          - name: JAVA_APP_OPTS
            value: {{if eq .Env.FLOW_DIST_ENV "pre"}}"-Denv=PRO -Didc=pre"{{else}}"-Denv=PRO"{{end}}
          - name: ENABLE_PP_AGENT
            value: {{if eq .Env.FLOW_DIST_ENV "pre"}}"0"{{else}}"1"{{end}}
          resources:
            limits:
              cpu: 3000m
              memory: 4096Mi
            requests:
              cpu: 2000m
              memory: 2048Mi
          ports:
            - containerPort: {{.Env.CMP_PORT}}
              name: web
              protocol: TCP
          volumeMounts:
          - name: logs
            mountPath: /tmp/log
          - name: xxx
            mountPath: /data/xxx
          volumeMounts:
          - name: logs
            mountPath: /tmp/log
      volumes:
      - name: xxx
        persistentVolumeClaim:
          claimName: xxx
      - name: logs
        emptyDir: {}
...

---
apiVersion: v1
kind: Service
metadata:
  name: {{$TRUE_APP_NAME}}-svc
  labels:
    rd: {{.Env.CMP_RD}}
    app: {{.Env.FLOW_STANDARD_NAME}}
    module: {{$MODULE}}
spec:
  type: ClusterIP
  selector:
    app: {{.Env.FLOW_STANDARD_NAME}}
    module: {{$MODULE}}
  ports:
    - name: web
      protocol: TCP
      port: {{.Env.CMP_PORT}}
      targetPort: {{.Env.CMP_PORT}}

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本文作者：dongsheng
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