Ansible剧本查找特定的Java进程并杀死

Question

I'm working on deploying microservices with ansible-playbook right now. And all of the microservices uses java -jar command to deploy. Right now I'm trying to write an ansible playbook to find and kill dependent java -jar process before deploying other one.

I'm running out of ideas here. I was thinking of creating a script in init.d for java deamon. But, if i do that and stop service, it would stop all the java processes which i wouldn't want.

Output for ps -ef | grep java ps -ef | grep java

root 28330 1 1 13:52 ? 00:00:56 java -jar -DCONFIG_FOLDER=/opt/app/microservices/deploy/dal-core/config /opt/app/microservices/deploy/dal-core/enrollment-vehicle-dal-core-0.0.1-SNAPSHOT.jar

root 29143 1 2 14:22 ? 00:00:49 java -jar -DCONFIG_FOLDER=/opt/app/microservices/deploy/dal-core/config /opt/app/microservices/deploy/dal-core/enrollment-vehicle-listener-0.0.1-SNAPSHOT.jar

root 29879 1 2 14:23 ? 00:00:48 java -jar -DCONFIG_FOLDER=/opt/app/microservices/deploy/dal-core/config /opt/app/microservices/deploy/dal-core/enrollment-account-dal-core-0.0.1-SNAPSHOT.jar

root 31093 1 3 14:28 ? 00:01:04 java -jar -DCONFIG_FOLDER=/opt/app/microservices/deploy/listener/config /opt/app/microservices/deploy/listener/enrollment-account-listener-0.0.1-SNAPSHOT.jar

asadmin 31208 18879 0 14:57 pts/1 00:00:00 grep --color=auto java

In the above scenario, If i happen do deploy enrollment-account-dal-core again, I should 1st kill enrollment-account-listener (pid:31093) and then enrollment-account-dal-core (pid:29879).

I have one playbook for all of the microservices so I won't be able to hard code it either.

Answer 1

I'm not sure, but I hope that pattern parameter in service module will solve your problem. You can find documentation here . I think your Ansible task will look like this code:

- name: Killing enrollment-account-listener
  service:
    name: enrollment-account-listener
    state: stopped
    pattern: enrollment-account-listener

Documentation says, if service with given name doesn't response to service status command, then find pattern in output of ps command. If the string is found, the service will be assumed to be running.

If it won't work, you can still use command or shell module to find solution to this problem.