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#!/bin/bash
key=`echo $3 | cut -d '=' -f 1`
val=`echo $3 | cut -d '=' -f 2`
if [ ! "$key" -eq "enable-shared-storage" -o "$key" -eq "cluster.enable-shared-storage" ]; then
exit;
fi
if [ "$val" != 'enable' ]; then
if [ "$val" != 'disable' ]; then
exit;
fi
fi
option=$val
key_val_pair1=`echo $4 | cut -d ',' -f 1`
key_val_pair2=`echo $4 | cut -d ',' -f 2`
key=`echo $key_val_pair1 | cut -d '=' -f 1`
val=`echo $key_val_pair1 | cut -d '=' -f 2`
if [ "$key" != "is_originator" ]; then
exit;
fi
is_originator=$val;
key=`echo $key_val_pair2 | cut -d '=' -f 1`
val=`echo $key_val_pair2 | cut -d '=' -f 2`
if [ "$key" != "local_node_hostname" ]; then
exit;
fi
local_node_hostname=$val;
# Read gluster peer status to find the peers
# which are in 'Peer in Cluster' mode and
# are connected.
number_of_connected_peers=0
while read -r line
do
# Already got two connected peers. Including the current node
# we have 3 peers which is enough to create a shared storage
# with replica 3
if [ "$number_of_connected_peers" == "2" ]; then
break;
fi
key=`echo $line | cut -d ':' -f 1`
if [ "$key" == "Hostname" ]; then
hostname=`echo $line | cut -d ':' -f 2 | xargs`
fi
if [ "$key" == "State" ]; then
peer_state=`echo $line | cut -d ':' -f 2 | cut -d '(' -f 1 | xargs`
conn_state=`echo $line | cut -d '(' -f 2 | cut -d ')' -f 1 | xargs`
if [ "$peer_state" == "Peer in Cluster" ]; then
if [ "$conn_state" == "Connected" ]; then
((number_of_connected_peers++))
connected_peer[$number_of_connected_peers]=$hostname
fi
fi
fi
done < <(gluster peer status)
# Include current node in connected peer list
((number_of_connected_peers++))
connected_peer[$number_of_connected_peers]=$local_node_hostname
# forming the create vol command
create_cmd="gluster --mode=script --wignore volume create \
gluster_shared_storage replica $number_of_connected_peers"
# Adding the brick names in the command
for i in "${connected_peer[@]}"
do
create_cmd=$create_cmd" "$i:"$GLUSTERD_WORKDIR"/ss_brick
done
if [ "$option" == "disable" ]; then
# Unmount the volume on all the nodes
umount /var/run/gluster/shared_storage
cat /etc/fstab | grep -v "gluster_shared_storage /var/run/gluster/shared_storage/" > /var/run/gluster/fstab.tmp
mv /var/run/gluster/fstab.tmp /etc/fstab
fi
if [ "$is_originator" == 1 ]; then
if [ "$option" == "enable" ]; then
# Create and start the volume
$create_cmd
gluster --mode=script --wignore volume start gluster_shared_storage
fi
if [ "$option" == "disable" ]; then
# Stop and delete the volume
gluster --mode=script --wignore volume stop gluster_shared_storage
gluster --mode=script --wignore volume delete gluster_shared_storage
fi
fi
function check_volume_status()
{
status=`gluster volume info gluster_shared_storage | grep Status | cut -d ':' -f 2 | xargs`
echo $status
}
mount_cmd="mount -t glusterfs "$local_node_hostname":/gluster_shared_storage \
/var/run/gluster/shared_storage"
if [ "$option" == "enable" ]; then
retry=0;
# Wait for volume to start before mounting
status=$(check_volume_status)
while [ "$status" != "Started" ]; do
sleep 5;
((retry++))
if [ "$retry" == 3 ]; then
break;
fi
status = check_volume_status;
done
# Mount the volume on all the nodes
umount /var/run/gluster/shared_storage
mkdir -p /var/run/gluster/shared_storage
$mount_cmd
cp /etc/fstab /var/run/gluster/fstab.tmp
echo "$local_node_hostname:/gluster_shared_storage /var/run/gluster/shared_storage/ glusterfs defaults 0 0" >> /var/run/gluster/fstab.tmp
mv /var/run/gluster/fstab.tmp /etc/fstab
fi
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