openstack
/
tripleo-image-elements
Code Issues Proposed changes

Improve percona cluster initialization 

* Switch from /etc/init.d/mysql bootstrap-pxc to
  /etc/init.d/mysql restart-bootstrap when bootstrapping
  a new cluster. This ensures that, even when Percona starts
  at boot, that new config is loaded and the cluster is
  bootstrapped.

* If percona fails to bootstrap or restart, ensure we do not
  touch the initialized file, allowing os-refresh-config to
  try again on the next iteration.

Co-Authored-By: Gregory Haynes <greg@greghaynes.net>
Change-Id: Ia720e40329a1d39db2e25fc917fbf5b5ea85dedc
This commit is contained in:
Kiall Mac Innes 2014-05-09 13:54:37 +01:00
parent 0c154b6438
commit 60eba01502
1 changed files with 18 additions and 7 deletions
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25
elements/mysql/os-refresh-config/configure.d/52-mysql-init
View File

@ -12,10 +12,10 @@ if [ ! -e ${MYSQL_INITIALIZED} ]; then
# Needed to setup initial tables. This command is idempotent. # Needed to setup initial tables. This command is idempotent.
/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/mnt/state/var/lib/mysql --no-defaults --pid-file=$pid_path --wsrep-new-cluster /usr/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
# We install this init script so we can trust this path exists # We install this init script so we can trust this path exists.
/etc/init.d/mysql bootstrap-pxc # Use of restart-bootstrap vs bootstrap-pxc ensures that, even if
# MySQL is running, the bootstrap will succeed.
touch ${MYSQL_INITIALIZED} /etc/init.d/mysql restart-bootstrap
elif [ $? -eq 1 ]; then elif [ $? -eq 1 ]; then
if grep -qE '^wsrep_cluster_address[[:space:]]*=[[:space:]]*gcomm://[[:space:]]*$' /etc/mysql/conf.d/cluster.cnf; 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." echo "We are configured as joiner and have no nodes configured for the cluster. Refusing to proceed until cluster nodes are known."
@ -23,12 +23,23 @@ if [ ! -e ${MYSQL_INITIALIZED} ]; then
fi fi
os-svc-restart -n mysql os-svc-restart -n mysql
touch ${MYSQL_INITIALIZED}
else else
echo "We are neither cluster initializer or joiner. Refusing to bootstrap mysql cluster until role is known." echo "We are neither cluster initializer or joiner. Refusing to bootstrap mysql cluster until role is known."
exit 1 exit 1
fi fi
# Ensure we actually have a working database, the Percona init script does not
# always exit with a non zero code upon failure.
if [ ! -S /var/run/mysqld/mysqld.sock ]; then
echo "MySQL Socket missing, is percona running correctly?"
exit 1
fi
# 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
touch ${MYSQL_INITIALIZED}
else else
# For single node setups we can re-bootstrap if were not currently running # For single node setups we can re-bootstrap if were not currently running
# We need to ensure we are bootstrap host to prevent our regex succeeding # We need to ensure we are bootstrap host to prevent our regex succeeding
@ -36,7 +47,7 @@ else
LOCAL_IP=$(os-apply-config --key local-ipv4 --type netaddress --key-default '') 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 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 if ! /etc/init.d/mysql status; then
/etc/init.d/mysql bootstrap-pxc /etc/init.d/mysql restart-bootstrap
fi fi
fi fi
fi fi