deploy to a different dir to fix hot upgrades

defaults/main.yml

@@ -36,6 +36,9 @@ enable_mail_alerts: False
 smtp_port: 587
 smtp_use_tls: False
 
+deploy_to_dir: "/srv/apps"
+deploy_to_path: "{{ deploy_to_dir }}/{{ app_name }}"
+
 # PRIVATE
 smtp_tls_option: ""
 npm_install_options: ""

tasks/project.yml

@@ -92,3 +92,7 @@
   remote_user: "{{ deployer }}"
   environment:
     MIX_ENV: "{{ mix_env }}"
+
+
+- name: "create directory for running app"
+  file: path="{{ deploy_to_path }}" state="directory" owner={{ deployer }}

tasks/release.yml

@@ -10,6 +10,13 @@
   remote_user: "{{ deployer }}"
 
 
+- name: get app version
+  command: bash -lc "mix run -e 'IO.puts \"RELEASE_VERSION=\" <> Mix.Project.config[:version]' | grep RELEASE_VERSION | sed 's/RELEASE_VERSION=//'" chdir="{{ project_path }}"
+  remote_user: "{{ deployer }}"
+  register: app_version_result
+- set_fact: app_version="{{ app_version_result.stdout }}"
+
+
 - name: "create release"
   command: bash -lc 'SERVER=1 mix release' chdir="{{ project_path }}"
   remote_user: "{{ deployer }}"
@@ -18,26 +25,34 @@
     PORT: "{{ app_port }}"
 
 
+- name: "extract release in running app dir"
+  unarchive: src="{{ project_path }}/rel/{{ app_name }}/releases/{{ app_version }}/{{ app_name}}.tar.gz" dest="{{ deploy_to_path }}" owner="{{ deployer }}" copy=no
+
+
 - when: deploy_type == "restart"
   name: start app
   monit: name="{{ app_name }}" state=started
 
 
 - when: deploy_type == "upgrade"
-  name: get app version
-  command: bash -lc "mix run -e 'IO.puts Mix.Project.config[:version]'" chdir="{{ project_path }}"
+  name: "create directory for new release version"
+  file: path="{{ deploy_to_path }}/releases/{{ app_version }}" state="directory" owner={{ deployer }}
+
+
+- when: deploy_type == "upgrade"
+  name: "copy release to running app dir"
+  command: cp {{ project_path }}/rel/{{ app_name }}/releases/{{ app_version }}/{{ app_name}}.tar.gz {{ deploy_to_path }}/releases/{{ app_version }}
   remote_user: "{{ deployer }}"
-  register: app_version
 
 
 - when: deploy_type == "upgrade"
   name: set upgrade command
-  set_fact: upgrade_command='rel/{{ app_name }}/bin/{{ app_name }} upgrade "{{ app_version.stdout }}"'
+  set_fact: upgrade_command='bin/{{ app_name }} upgrade "{{ app_version }}"'
 
 
 - when: deploy_type == "upgrade"
   name: upgrade app
-  command: bash -lc "{{ upgrade_command }}" chdir="{{ project_path }}"
+  command: bash -lc "{{ upgrade_command }}" chdir="{{ deploy_to_path }}"
   remote_user: "{{ deployer }}"
   environment:
     MIX_ENV: "{{ mix_env }}"

templates/app.monit.j2

@@ -1,6 +1,6 @@
 check process {{app_name}} MATCHING "{{app_name}}/releases"
-       start program = "/bin/su - {{ deployer }} -c 'PORT={{ app_port }} {{project_path}}/rel/{{app_name}}/bin/{{app_name}} start'"
-       stop program = "/bin/su - {{ deployer }} -c 'PORT={{ app_port }} {{project_path}}/rel/{{app_name}}/bin/{{app_name}} stop'"
+       start program = "/bin/su - {{ deployer }} -c 'PORT={{ app_port }} {{ deploy_to_path }}/bin/{{app_name}} start'"
+       stop program = "/bin/su - {{ deployer }} -c 'PORT={{ app_port }} {{ deploy_to_path }}/bin/{{app_name}} stop'"
        {% for alert_email in app_alert_emails %}
        alert {{ alert_email }}
        {% endfor %}