README.md

rbd-unlock

A convenience container to release a lock on an RBD image

Make sure to pass your /etc/ceph path as a volume/bind-mount.

It uses the following environment variables, if present:

IMAGENAME: this should be of the form poolName/imageName, and you may override this by passing the image name as the first argument
LOCKNAME: this is name of the lock, and you may override this by passing the lock name as the second argument. The LOCKNAME will default to the HOSTNAME of the machine.
LOCKID: this is the id of the lock, and you may override this by passing the lock id as the third argument.
ETCD_LOCKID_KEY: this is the key name from where the LOCKID should be read (thus obviating and overriding LOCKID)
ETCDCTL_PEERS is a comma seperated list of etcd peers (e.g. http://192.168.2.4:4001)
etcdctl is used to get the key, so any environment variable which acts upon etdctl will be honored within the execution.

Example:

docker run --rm -v /etc/ceph:/etc/ceph ceph/rbd-unlock myPool/myImage myLockName lockId