roles/common: Don't update apt cache when removing packages

It is a standalone package on (at least) Ubuntu 20.04 and Debian 11
and some cloud images do not have it installed by default (for exa-
mple Scaleway).

roles/common/tasks/ntp.yml

@@ -1,18 +1,27 @@
 ---
 # Hosts running Ubuntu 16.04+ and Debian 9+ use systemd init system and should
-# use timedatectl as a network time client instead of the standalone ntp client.
+# use systemd-timesyncd as a network time client instead of the standalone ntp
+# client.
 
 - name: Set timezone
   when: timezone is defined and ansible_service_mgr == 'systemd'
   command: /usr/bin/timedatectl set-timezone {{ timezone }}
   tags: timezone
 
+# Apparently some cloud images don't have this installed by default. From what
+# I can see on existing servers, systemd-timesyncd is a standalone package on
+# Ubuntu 20.04 and Debian 11.
+- name: Install systemd-timesyncd
+  when: (ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('20.04', '==')) or
+        (ansible_distribution == 'Debian' and ansible_distribution_version is version('11', '=='))
+  apt: name=systemd-timesyncd state=present cache_valid_time=3600
+
 - name: Start and enable systemd's NTP client
   when: ansible_service_mgr == 'systemd'
   systemd: name=systemd-timesyncd state=started enabled=yes
 
 - name: Uninstall ntp on modern Ubuntu/Debian
-  apt: name=ntp state=absent update_cache=yes
+  apt: name=ntp state=absent
   when: ansible_service_mgr == 'systemd'
 
 # vim: set ts=2 sw=2:

roles/mariadb/defaults/main.yml

@@ -17,7 +17,7 @@ innodb_buffer_pool_size: 256M
 # Ansible 2.7.x with PyMySQL seems to default to TCP connection so we should
 # force it to use a Unix socket.
 # See: https://github.com/ansible/ansible/issues/47736
-mariadb_login_unix_socket: /var/run/mysqld/mysqld.sock
+mariadb_login_unix_socket: /run/mysqld/mysqld.sock
 
 # default is 100 but the max I've seen used is 5, so let's reduce it
 max_connections: 33

roles/mariadb/templates/my.cnf.j2

@@ -19,14 +19,14 @@
 # Remember to edit /etc/mysql/debian.cnf when changing the socket location.
 [client]
 port		= 3306
-socket		= /var/run/mysqld/mysqld.sock
+socket		= /run/mysqld/mysqld.sock
 
 # Here is entries for some specific programs
 # The following values assume you have at least 32M ram
 
 # This was formally known as [safe_mysqld]. Both versions are currently parsed.
 [mysqld_safe]
-socket		= /var/run/mysqld/mysqld.sock
+socket		= /run/mysqld/mysqld.sock
 nice		= 0
 
 [mysqld]
@@ -34,8 +34,8 @@ nice		= 0
 # * Basic Settings
 #
 user		= mysql
-pid-file	= /var/run/mysqld/mysqld.pid
-socket		= /var/run/mysqld/mysqld.sock
+pid-file	= /run/mysqld/mysqld.pid
+socket		= /run/mysqld/mysqld.sock
 port		= 3306
 basedir		= /usr
 datadir		= /var/lib/mysql