Fix mysql installation on openSUSE

Use os-svc-enable and -restart the mysql service to have "map-services"
handle the different service names on different Distros.
Create /var/lib/mysql on openSUSE. Otherwise register-state-path will
not prepare /var/lib/use-ephemeral/ correctly for it.
Create a /var/run/mysql/mysql.sock compatibility link to have mysql
clients find the database sockets. This needs to happen in the running
system as /var/run is a tmpfs on openSUSE.

Change-Id: I4086ff08ecd84072a109319ea8f872c75ab7ce45

elements/mysql/install.d/10-mysql

@@ -25,6 +25,8 @@ if [ -e /etc/init/mysql.conf ]; then
 fi
 # Fedora/RHEL install /etc/my.cnf but we do not want any unmanaged configs
 rm -f /etc/my.cnf
+# On openSUSE /var/lib/mysql is not part of the mariadb packages.
+[ -d /var/lib/mysql ] || install -d -o mysql -g root -m 0700 /var/lib/mysql
 register-state-path /var/lib/mysql
 # We need to setup the directory with appropriate permissions and then
 # the first time we boot a particular state partition we rsync this in.
@@ -36,7 +38,7 @@ if [ "$DIB_INIT_SYSTEM" == "systemd" ]; then
     # mysqld.service -> mariadb.service to maintain backwards compatibility,
     # there's a bug with systemd and symlinked service files:
     # https://bugzilla.redhat.com/show_bug.cgi?id=1014311
-    systemctl enable mysqld.service || systemctl enable mariadb.service
+    os-svc-enable -n mysql || os-svc-enable -n mariadb
 fi
 
 DISTRO=`lsb_release -si` || true

elements/mysql/os-refresh-config/post-configure.d/40-mysql

@@ -1,2 +1,7 @@
 #!/bin/bash
-service mysql restart || service mysqld restart
+os-svc-restart -n mysql
+
+DISTRO=`lsb_release -si` || true
+if [ "openSUSE project" = "$DISTRO" ]; then
+    ln -sf /var/run/mysqld/mysqld.sock /var/run/mysql/mysql.sock
+fi