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etcdctl:tldr:4afd4
The command "etcdctl watch ${my-key}" is used to monitor changes to a specific key in an etcd cluster. Here's what each component does:
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"etcdctl" is the command-line tool used to interact with etcd, a distributed key-value store that is often used as a highly available configuration and coordination service in distributed systems. It provides various functionalities to manage keys and values stored in the cluster.
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"watch" is a subcommand of "etcdctl" that allows you to monitor changes to a key in real-time. When using the "watch" command, etcd will continuously watch for any modifications made to the specified key and display the changes as they occur.
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"${my-key}" is a placeholder representing the key that you want to watch for changes. You would replace "${my-key}" with the actual key you want to monitor. For example, if you wanted to watch changes to a key named "foo", you would run the command "etcdctl watch foo".
Overall, this command enables you to observe any modifications made to a specific key in an etcd cluster as soon as they happen.