It appears that the cman tooling isn't available in Trusty even, so this means the clvm is really broken. On >= Trusty this can be fixed by checking the corosync status (corosync-quorumtool -s) to ensure that the clustering (corosync) services are up.
It appears that the cman tooling isn't available in Trusty even, so this means the clvm is really broken. On >= Trusty this can be fixed by checking the corosync status (corosync- quorumtool -s) to ensure that the clustering (corosync) services are up.