Use Percona Packages for Ubuntu and Debian

Adjust the install of Percona XtraDB Cluster to use Percona Packages
instead of a Percona tarball for Ubuntu and Debian.

This pulls the packages in from the Ubuntu repository. The minimum requirement
for the Percona packages is trusty.

This element currently will not work on Fedora and checks for it but Fedora
uses the Mariadb element to provide a MySQL HA solution instead.

Change-Id: Ie13bf0f7a972ed7f69623c9a661065b46441c3e9

elements/mysql/README.md

@@ -1,9 +1,15 @@
-Installs Percona Xtradb Cluster which is Mysql+HA solution
+Installs Percona Xtradb Cluster which is a MySQL HA solution
 
 Mysql and mariadb elements are very similar so both depend on mysql-common
 element which contains shared logic. See mysql-common for more details about
 mysql setup.
 
+Please use the mariadb-rpm on Fedora based systems.
+
+The Percona packages are in trusty apt repository and so trusty is a
+minimal requirement for this. You could use the apt-sources element
+to add the percona apt mirror to your image.
+
 Heat
 ----
 

elements/mysql/install.d/10-mysql

@@ -4,24 +4,24 @@
 
 set -eu
 set -o xtrace
+set -o pipefail
 
-install-packages libaio1 pv rsync lsof
-percona_pkgdir=Percona-XtraDB-Cluster
+DISTRO=`lsb_release -si` || true
+
+if [[ "Ubuntu Debian" =~ "$DISTRO" ]]; then
+    install-packages percona-xtrabackup \
+        percona-xtradb-cluster-common-5.5 percona-xtradb-cluster-server-5.5 \
+        percona-xtradb-cluster-client-5.5 percona-xtradb-cluster-galera-2.x
+elif [[ "RedHatEnterpriseServer CentOS Fedora" =~ "$DISTRO" ]]; then
+    echo "Please use mariadb on RedHat, CentOS or Fedora systems"
+    exit 1
+else
+    echo "05-mysql should have failed before this"
+    exit 1
+fi
 
-# Adapted from mysql ref manual
-# http://dev.mysql.com/doc/refman/5.6/en/binary-installation.html
-groupadd mysql
-useradd -r -g mysql mysql
-cd /usr/local
-ln -s /usr/local/$percona_pkgdir mysql
-cd mysql
-chown -R mysql:mysql .
-install -o root -g root -m 0755 support-files/mysql.server /etc/init.d/mysql
-install -o root -g root -m 0755 bin/mysql /usr/local/bin
-install -o root -g root -m 0755 bin/mysqld /usr/local/bin
-sed -i -e 's,^#\!/bin/sh$,#\!/bin/bash,' /etc/init.d/mysql
-sed -i -e 's,^basedir=$,basedir=/usr/local/mysql,' /etc/init.d/mysql
 sed -i -e 's,^datadir=$,datadir=/mnt/state/var/lib/mysql,' /etc/init.d/mysql
+sed -i -e 's,mysql_data_dir="/var/lib/mysql",mysql_data_dir="/mnt/state/var/lib/mysql",' /etc/init.d/mysql
 
 # The following line are due to a bug found in the Percona supplied init
 # script where the start sequence does not capture and return an error
@@ -40,26 +40,27 @@ fi
 # difficult not to use this as the directory for configs.
 rm -rf /etc/mysql
 ln -s /mnt/state/etc/mysql /etc/mysql
+
 if [ -e /etc/apparmor.d/usr.sbin.mysqld ] ; then
     sed -i -e 's,/var/lib/mysql/,/mnt/state/var/lib/mysql/,g' /etc/apparmor.d/usr.sbin.mysqld
     sed -i -e 's,/var/log/mysql/,/mnt/state/var/log/mysql/,g' /etc/apparmor.d/usr.sbin.mysqld
     sed -i -e 's,/etc/mysql/,/mnt/state/etc/mysql/,g' /etc/apparmor.d/usr.sbin.mysqld
 fi
+
 if [ -e /etc/init/mysql.conf ]; then
     sed -i -e 's,/var/lib/mysql/,/mnt/state/var/lib/mysql/,g' /etc/init/mysql.conf
 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
+
+# The packages create a initial db which we don't want or need
+rm -fr /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.
 [ -d /var/log/mysql ] || install -d -o root -g mysql -m 0775 /var/log/mysql
 register-state-path --leave-symlink /var/log/mysql
 
-if [[ "rhel rhel7 centos7 fedora" =~ "$DISTRO_NAME" ]]; then
-    # mysql clients on redhat expect the socket at /var/lib/mysql/mysql.sock
-    mkdir -p /var/lib/mysql
-    ln -s /var/run/mysqld/mysqld.sock /var/lib/mysql/mysql.sock
-fi
+# galera lib path is set in mysql config file, creating symlink
+# /usr/local/mysql/lib/libgalera_smm.so allows us to use same path
+# for mysql and mariadb and for i386/amd64
+[ -e /usr/local/mysql/lib ] || install -m 0755 -o root -g root -d /usr/local/mysql/lib
+ln -sf /usr/lib/libgalera_smm.so /usr/local/mysql/lib/libgalera_smm.so

elements/mysql/os-refresh-config/configure.d/52-mysql-init

@@ -8,14 +8,16 @@ mkdir -p $(dirname $pid_path)
 chown mysql:root $(dirname $pid_path)
 
 if [ ! -e ${MYSQL_INITIALIZED} ]; then
+    [ -d /mnt/state/var/lib/mysql ] || install -m 0700 -o mysql -g mysql -d /mnt/state/var/lib/mysql
     if os-is-bootstrap-host; then
         # Needed to setup initial tables. This command is idempotent.
-        /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/mnt/state/var/lib/mysql --no-defaults --pid-file=$pid_path  --wsrep-new-cluster
+        /usr/bin/mysql_install_db --user=mysql --datadir=/mnt/state/var/lib/mysql --no-defaults --pid-file=$pid_path  --wsrep-new-cluster
 
-        # We install this init script so we can trust this path exists.
-        # Use of restart-bootstrap vs bootstrap-pxc ensures that, even if
-        # MySQL is running, the bootstrap will succeed.
-        /etc/init.d/mysql restart-bootstrap
+        # Shutdown MySql if running to pick up the new configuration
+        # These two lines can be replaced by /etc/init.d/mysql restart-bootstrap
+        # when available in later versions of the Percona packages.
+        /etc/init.d/mysql stop
+        /etc/init.d/mysql bootstrap-pxc
     elif [ $? -eq 1 ]; then
         if grep -qE '^wsrep_cluster_address[[:space:]]*=[[:space:]]*gcomm://[[:space:]]*$' /etc/mysql/conf.d/cluster.cnf; then
             echo "We are configured as joiner and have no nodes configured for the cluster. Refusing to proceed until cluster nodes are known."
@@ -37,7 +39,7 @@ if [ ! -e ${MYSQL_INITIALIZED} ]; then
 
     # Finally, perform a MySQL "ping". This will succeed even when MySQL returns
     # an "Access Denied" packet, avoiding the need to provide valid credentials.
-    /usr/local/mysql/bin/mysqladmin ping
+    /usr/bin/mysqladmin ping
 
     touch ${MYSQL_INITIALIZED}
 else
@@ -47,7 +49,11 @@ else
     LOCAL_IP=$(os-apply-config --key local-ipv4 --type netaddress --key-default '')
     if os-is-bootstrap-host && grep -Eq "^wsrep_cluster_address=gcomm://$LOCAL_IP,?\$" /etc/mysql/conf.d/cluster.cnf; then
         if ! /etc/init.d/mysql status; then
-            /etc/init.d/mysql restart-bootstrap
+            # Shutdown MySql if running to pick up the new configuration
+            # These two lines can be replaced by /etc/init.d/mysql restart-bootstrap
+            # when available later versions of the Percona packages.
+            /etc/init.d/mysql stop
+            /etc/init.d/mysql bootstrap-pxc
         fi
     fi
 fi