CODEWITHSUNDEEP
tomcatjaransible
Peter Pik
Peter Pik

Reputation: 11193

ansible jar check if already installed

i'm having a jar file that installs tomcat with a website. so i have following tasks download jar file, install jar file and delete jar file. however i want ansible to tell that it is already installed instead of downloading and trying to install again. how can i achieve such?

- name: Downloading installer
  get_url:
  url: http://[URl]/installfile.jar
  dest: "/opt"

- name: Installing jar file
  shell: java -jar "/opt/installfile.jar"

- name: Removing installer
  file:
  state: absent
  path: "/opt/installfile.jar"

Upvotes: 1

Views: 1577

Answers (1)

m4grio
m4grio

Reputation: 66

You can use creates arg on the install task at least, so that the java program will only run when certain file does not yet exist. Ansible will create such file the first time the task runs.

Something like:

- name: Installing jar file
  shell: java -jar "/opt/installfile.jar"
  args:
    creates: /opt/installfile-check

Or if you want to condition the three tasks to run only when Tomcat is not installed, you need to first run a program that checks whether it is installed and register its result in a variable that other tasks can use to determine if they need to run using when. 

- name: Check to see if Tomcat is installed
  shell: "command --that --checks" # Just an example, obviously
  register: tomcat_is_installed

You can then include the Tomcat playbook only when it is not installed:

- name: This playbook will only be included when Tomcat is not installed
  include: tomcat-playbook.yml
  when: tomcat_is_installed.rc != 0

Upvotes: 1

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