Be able to get the key from a url.

Copying the key of the ubuntu user is not actually useful because packer by default generates new keys for each machine it brings up.

playbooks/roles/jenkins_worker/defaults/main.yml

@@ -14,3 +14,5 @@ jenkins_debian_pkgs:
 
 # packer direct download URL
 packer_url: "https://releases.hashicorp.com/packer/0.8.6/packer_0.8.6_linux_amd64.zip"
+
+jenkins_worker_key_url: null

playbooks/roles/jenkins_worker/tasks/system.yml

@@ -16,8 +16,12 @@
     owner={{ jenkins_user }} group={{ jenkins_group }}
   ignore_errors: yes
 
-- name: Copy ssh keys for jenkins
-  command: cp /home/ubuntu/.ssh/authorized_keys /home/{{ jenkins_user }}/.ssh/authorized_keys
+- name: Get the authorized key that should be used for this machine.
+  authorized_key:
+    user: "{{ jenkins_user }}"
+    state: present
+    key: "{{ jenkins_worker_key_url }}"
+  when: jenkins_worker_key_url
   ignore_errors: yes
 
 - name: Set key permissions