[Backport release-1.29] Harden etcd subcommand usage and validation #4128
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This is usually the way etcdctl displays member IDs. This makes it more intuitive and easier to correlate with etcdctl's output. Signed-off-by: Tom Wieczorek <[email protected]> (cherry picked from commit a8ce70b)
The etcd leave subcommand can be used to remove k0s nodes from the etcd cluster. If no IP address is specified, the default is to remove the current node. The IP of the node to be removed can be specified with the --peer-address flag. However, it's quite tempting to just pass the IP as an argument, like this `k0s etcd drop 192.168.0.0.3`. This extra argument will simply be ignored, and the leave subcommand will use its defaults. This can be _very_ confusing, and also quite dangerous, as it may remove _different_ nodes than intended. Improve the subcommand by making it fail if arguments are passed to it. Add validation to the --peer-address flag and improve the usage strings. While at it, make the etcd member-list subcommand reject any args as well. Signed-off-by: Tom Wieczorek <[email protected]> (cherry picked from commit 477d354)
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twz123
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jnummelin
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Mar 27, 2024
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Automated backport to
release-1.29, triggered by a label in #4118.See k0sproject/k0smotron#459.