[docker]docker run指定entrypiont

指定entrypiont

• 错误的姿势

 docker run -itd -v /tmp/:/tmp/ jdk-ori 'java -jar /tmp/sms.jar'

• 正确的姿势1

 docker run -itd -v /tmp/:/tmp/ jdk-ori java -jar '/tmp/sms.jar'

• 正确姿势2:

docker run -it -itd -v /tmp/:/tmp/ --entrypoint /srv/java/jdk/bin/java jdk-ori -jar /tmp/sms.jar
 --entrypoint "/srv/java/jdk/bin/java -jar"  这样是不支持的, 这个传参方式不能加参数 ,而dockerfile里则可以

• 正确姿势3: 挂脚本方式

$ cat /tmp/entry.sh
#!/bin/bash
java -jar $1
docker run -it --rm -v /tmp/:/tmp/ --entrypoint "/tmp/entry.sh" jdk-ori /tmp/sms.jar

也可以指定这些:

https://docs.docker.com/engine/reference/run/#entrypoint-default-command-to-execute-at-runtime

CMD (Default Command or Options)
ENTRYPOINT (Default Command to Execute at Runtime)
EXPOSE (Incoming Ports)
ENV (Environment Variables)
HEALTHCHECK
VOLUME (Shared Filesystems)
USER
WORKDIR

如何在k8s里指定docker run -w 的workdir

$ cat centos.yaml
apiVersion: v1
kind: Pod
metadata:
  name: my-centos
  labels:
    app: centos
spec:
  containers:
  - name: my-centos
    image: centos:6.8
    imagePullPolicy: IfNotPresent
    command: ["top","-b"]
    env:
      - name: PWD
        value: "/tmp"