add and then remove git-identity for xserver

playbooks/roles/xserver/tasks/deploy.yml

@@ -23,11 +23,19 @@
   tags:
   - deploy
 
+- name: install read-only ssh key for the content repo that is required for grading
+  copy: src={{ xserver_git_identity_path }} dest=/etc/git-identity force=yes owner=ubuntu group=adm mode=60
+
 - name: checkout grader code
   git: dest={{xserver_grader_dir}} repo={{xserver_grader_source}} version={{xserver_grader_version}}
+  environment:
+    GIT_SSH: /tmp/git_ssh.sh
   tags:
   - deploy
 
+- name: remove read-only ssh key for the content repo
+  file: path=/etc/git-identity state=absent
+
 - name: start xserver
   service: name=xserver state=started
   tags: