Use systemd-journald instead of log files

This patch aims to migrate service from usage of regular syslog files
to journald. We also disable uwsgi logging, since it dublicates
requests that are logged by service itself.

Change-Id: Id466ac20d9d18fa86a4615a73433a51720bafc8e

defaults/main.yml

@@ -242,6 +242,7 @@ zun_pip_packages:
   - python-memcached
   - python-zunclient
   - pymysql
+  - systemd-python
   - zun
 
 ## (Qdrouterd) integration

tasks/zun_pre_install.yml

@@ -74,34 +74,6 @@
   tags:
     - zun-dirs
 
-- name: Test for log directory or link
-  shell: |
-    if [ -h "{{ zun_log_dir }}"  ]; then
-      chown -h {{ zun_system_user_name }}:{{ zun_system_group_name }} "{{ zun_log_dir }}"
-      chown -R {{ zun_system_user_name }}:{{ zun_system_group_name }} "$(readlink {{ zun_log_dir }})"
-    else
-      exit 1
-    fi
-  register: log_dir
-  failed_when: false
-  changed_when: false
-  tags:
-    - zun-dirs
-    - zun-logs
-
-- name: Create zun log dir
-  file:
-    path: "{{ zun_log_dir }}"
-    state: directory
-    owner: "{{ zun_system_user_name }}"
-    group: "{{ zun_system_group_name }}"
-    mode: "0755"
-  when:
-    - log_dir.rc != 0
-  tags:
-    - zun-dirs
-    - zun-logs
-
 - name: Drop sudoers file
   template:
     src: "sudoers.j2"

templates/zun.conf.j2

@@ -51,7 +51,7 @@
 # to enable journal support. Doing so will use the journal native protocol
 # which includes structured metadata in addition to log messages.This option is
 # ignored if log_config_append is set. (boolean value)
-#use_journal = false
+use_journal = true
 
 # Syslog facility to receive log lines. This option is ignored if
 # log_config_append is set. (string value)

vars/debian.yml

@@ -23,6 +23,7 @@ zun_distro_packages:
   - ca-certificates
   - curl
   - git
+  - libsystemd-dev
   - software-properties-common
 
 zun_distro_compute_packages:

vars/redhat-7.yml

@@ -20,6 +20,7 @@ zun_docker_repo:
 # Common yum packages
 zun_distro_packages:
   - git
+  - systemd-devel
 
 zun_distro_compute_packages:
   - docker

vars/suse.yml

@@ -23,6 +23,7 @@ zun_distro_packages:
   - git
   - yum-utils
   - lvm2
+  - systemd-devel
 
 zun_distro_compute_packages:
   - docker-ce