November 2018
Beginner
230 pages
6h 4m
English
Content preview from Docker Quick Start Guide
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docker swarm unlock-key
The swarm unlock-key command is much like the swarm ca command. The unlock-key command can be used to retrieve the current swarm unlock key, or it can be used to rotate the unlock key to a new one:
# Retrieve the current unlock keydocker swarm unlock-key# Rotate to a new unlock keydocker swarm unlock-key --rotate
Depending on the size of the swarm cluster, the unlock key rotation can take a while for all of the manager nodes to get updated.
It is a good idea to keep the current (old) key handy for a while when you rotate the unlock key, on the off-chance that a manager node goes offline before getting the updated key. That way, you can still unlock the node using the old key. Once the node is unlocked and receives ...
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