e7387a6baa
In an ideal state, if the galera containers are shut down cleanly, they will leave behind a gvwstate.dat file on each node which provides the cluster member details so that it can automatically start up again without intervention. However, when imaging the MNAIO systems we only interact with the hosts, so the galera containers sometimes do no shut down cleanly. To cater for this, we inspect the disk images for the primary component, then build the gvwstate.dat file for the other galera containers. With those put back into the image, when the VM's start, the cluster forms immediately. References: http://galeracluster.com/documentation-webpages/pcrecovery.html http://galeracluster.com/documentation-webpages/restartingcluster.html Change-Id: Icfe067607baefd661147f3c22ce846f06fff7c60
71 lines
2.2 KiB
Bash
71 lines
2.2 KiB
Bash
#!/bin/bash -ex
|
|
|
|
# provide default images to inspect
|
|
infra_images="/data/images/infra1.img /data/images/infra2.img /data/images/infra3.img"
|
|
|
|
# declare an array to map images to container names
|
|
declare -A image_map
|
|
|
|
# declare an array to map container names to uuid's
|
|
declare -A uuid_map
|
|
|
|
# at this stage, no galera container is the master
|
|
master_cnt=""
|
|
|
|
# get the list of galera container names
|
|
for img in ${infra_images}; do
|
|
image_map[${img}]="$(virt-ls --add ${img} --mount /dev/vmvg00/openstack00 / | grep galera_container)"
|
|
done
|
|
|
|
# get the gvwstate.dat files from the image and
|
|
# put it into a local folder using the same name
|
|
# as the container
|
|
for img in ${infra_images}; do
|
|
mkdir -p /tmp/${image_map[$img]}
|
|
guestfish --ro --add ${img} --mount /dev/vmvg00/openstack00 glob copy-out /${image_map[$img]}/*.dat /tmp/${image_map[$img]}/
|
|
done
|
|
|
|
# work through the existing gvwstate files
|
|
# there may be more than one, so we need to
|
|
# find the one holding the view_id
|
|
for cnt in $(ls -1 /tmp | grep galera_container); do
|
|
gvwstate_path="/tmp/${cnt}/gvwstate.dat"
|
|
if [[ -e ${gvwstate_path} ]]; then
|
|
my_uuid=$(awk '/^my_uuid:/ { print $2 }' ${gvwstate_path})
|
|
view_id=$(awk '/^view_id:/ { print $3 }' ${gvwstate_path})
|
|
if [[ "${my_uuid}" == "${view_id}" ]]; then
|
|
master_gvwstate_path=${gvwstate_path}
|
|
master_cnt=${cnt}
|
|
fi
|
|
fi
|
|
if [[ "${cnt}" == "${master_cnt}" ]]; then
|
|
uuid_map[${cnt}]=${my_uuid}
|
|
else
|
|
uuid_map[${cnt}]=$(uuidgen)
|
|
fi
|
|
done
|
|
|
|
# prepare a new master in a temporary location
|
|
tmp_gvwstate="/tmp/gvwstate.dat"
|
|
cp ${master_gvwstate_path} ${tmp_gvwstate}
|
|
member_num=$(awk '/^member: '${my_uuid}'/ {print $3}' ${tmp_gvwstate})
|
|
|
|
# clear the existing members
|
|
sed -i.bak '/^member:/d' ${tmp_gvwstate}
|
|
|
|
# insert the new set of members
|
|
for cnt_uuid in "${uuid_map[@]}"; do
|
|
sed -i.bak "/^#vwend$/i \\
|
|
member: ${cnt_uuid} ${member_num}" ${tmp_gvwstate}
|
|
done
|
|
|
|
# copy the new version to each location
|
|
for cnt in "${!uuid_map[@]}"; do
|
|
sed "s/my_uuid: .*/my_uuid: ${uuid_map[$cnt]}/" ${tmp_gvwstate} > /tmp/${cnt}/gvwstate.dat
|
|
done
|
|
|
|
# put the gvwstate.dat files back into the image
|
|
for img in ${infra_images}; do
|
|
guestfish --rw --add ${img} --mount /dev/vmvg00/openstack00 copy-in /tmp/${image_map[$img]}/gvwstate.dat /${image_map[$img]}/
|
|
done
|