docker设置jvm参数_dockerfile指定jvm参数

##实例

FROM java:8

VOLUME /tmp

ADD app.jar app.jar

RUN bash -c ‘touch /app.jar’

EXPOSE 9001

ENV JAVA_OPTS=”\

-server \

-Xmx4g \

-Xms4g \

-Xmn2g \

-XX:SurvivorRatio=8 \

-XX:MetaspaceSize=256m \

-XX:MaxMetaspaceSize=512m \

-XX:+UseParallelGC \

-XX:ParallelGCThreads=4 \

-XX:+UseParallelOldGC \

-XX:+UseAdaptiveSizePolicy \

-XX:+PrintGCDetails \

-XX:+PrintTenuringDistribution \

-XX:+PrintGCTimeStamps \

-XX:+HeapDumpOnOutOfMemoryError \

-XX:HeapDumpPath=/ \

-Xloggc:/gc.log \

-XX:+UseGCLogFileRotation \

-XX:NumberOfGCLogFiles=5 \

-XX:GCLogFileSize=10M”

ENTRYPOINT java ${JAVA_OPTS} -Djava.security.egd=file:/dev/./urandom -jar /app.jar

不过这种方式在dockerfile写死了不灵活，不是很推荐，特别是要区分env的应用来说。

##docker run指定

docker run –rm -e JAVA_OPTS=’-Xmx1g’ tomcat

##docker-compose方式指定

environment:

– JVM_OPTS=-Xmx12g -Xms12g -XX:MaxPermSize=1024m

##k8s指定

apiVersion: v1

kind: ReplicationController

metadata:

labels:

app: jenkins

role: master

version: v1

name: jenkins-master

namespace: jenkins

spec:

replicas: 1

selector:

app: jenkins

role: master

version: v1

template:

metadata:

labels:

app: jenkins

role: master

version: v1

spec:

containers:

– env:

– name: JENKINS_OPTS

value: –prefix=

– name: JAVA_OPTS

value: -Djava.awt.headless=true -Xmx200m -Dcom.sun.management.jmxremote=

-Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.ssl=false

-Dcom.sun.management.jmxremote.authenticate=false

image: jenkins:2.7.2

name: jenkins

ports:

– containerPort: 8080

name: web

– containerPort: 50000

name: leader

resources:

limits:

cpu: 1000m

memory: 800Mi

requests:

cpu: 100m

memory: 400Mi

volumeMounts:

– mountPath: /var/jenkins_home

name: jenkins-master

nodeSelector:

worker: “true”

volumes:

– name: jenkins-master

nfs:

path: /data/jenkins-master

server: ‘{
{nfs_server}}’

##doc