如何修改容器内的/etc/resolv.conf

$ oc create serviceaccount useroot
$ oc adm policy add-scc-to-user anyuid -z useroot
$ oc patch dc/mytomcat --patch ‘{"spec":{"template":{"spec":{"serviceAccountName": "useroot"}}}}‘

[root@master tomcat]# cat Dockerfile 
FROM docker-registry.default.svc:5000/myproject/tomcat:8-slim


COPY startapp.sh /usr/local/tomcat/bin/startapp.sh

CMD ["/usr/local/tomcat/bin/startapp.sh"] 

[root@master tomcat]# cat startapp.sh 
#!/bin/bash

echo "startup ...."

cp /etc/resolv.conf /etc/resolv.conf1
sed -i "s/:5/:5 single-request/" /etc/resolv.conf1
cp /etc/resolv.conf1 /etc/resolv.conf

/usr/local/tomcat/bin/catalina.sh run

docker build -t docker-registry.default.svc:5000/myproject/mytomcat:8-slim .
docker push docker-registry.default.svc:5000/myproject/mytomcat:8-slim