Merge pull request #9066 from spzala/etcdconfig
Doc: update etcd configuration detail with config filerelease-3.4
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# Configuration flags
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etcd is configurable through command-line flags and environment variables. Options set on the command line take precedence over those from the environment.
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etcd is configurable through a configuration file, various command-line flags, and environment variables.
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A reusable configuration file is a YAML file made with name and value of one or more command-line flags described below. In order to use this file, specify the file path as a value to the `--config-file` flag. The [sample configuration file][sample-config-file] can be used as a starting point to create a new configuration file as needed.
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Options set on the command line take precedence over those from the environment. If a configuration file is provided, other command line flags and environment variables will be ignored.
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For example, `etcd --config-file etcd.conf.yml.sample --data-dir /tmp` will ignore the `--data-dir` flag.
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The format of environment variable for flag `--my-flag` is `ETCD_MY_FLAG`. It applies to all flags.
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@ -332,6 +337,7 @@ Follow the instructions when using these flags.
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### --config-file
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+ Load server configuration from a file.
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+ default: ""
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+ example: [sample configuration file][sample-config-file]
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## Profiling flags
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@ -369,3 +375,4 @@ Follow the instructions when using these flags.
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[security]: security.md
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[systemd-intro]: http://freedesktop.org/wiki/Software/systemd/
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[tuning]: ../tuning.md#time-parameters
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[sample-config-file]: ../../etcd.conf.yml.sample
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