获取 Docker 容器的 PID 号

# 获取容器的 CONTAINER ID
docker ps -q
5354ce7e85e1

# 通过 docker top 获取 PID
docker top 5354ce7e85e1
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
root                81534               81517               3                   2019                ?                   05:33:29            java -Djava.security.egd=file:/dev/./urandom -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector -Dspring.profiles.active=docker -jar /app.jar

# 获取所有容器的 PID
for l in `docker ps -q`;do docker top $l|awk -v dn="$l" 'NR>1 {print dn " PID is " $2}';done

# 通过 docker inspect 方式
docker inspect --format "{{.State.Pid}}" container_id/name