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Add support for ${} env vars in configuration file (#5648)

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This commit is contained in:
Daniel Nelson
2019-03-29 16:02:10 -07:00
committed by GitHub
parent aac013f8ab
commit 6feb6c1853
4 changed files with 30 additions and 18 deletions
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16
docs/CONFIGURATION.md
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@@ -34,10 +34,10 @@ configuration files.
### Environment Variables
Environment variables can be used anywhere in the config file, simply prepend
them with `$`. Replacement occurs before file parsing. For strings
the variable must be within quotes, e.g., `"$STR_VAR"`, for numbers and booleans
they should be unquoted, e.g., `$INT_VAR`, `$BOOL_VAR`.
Environment variables can be used anywhere in the config file, simply surround
them with `${}`. Replacement occurs before file parsing. For strings
the variable must be within quotes, e.g., `"${STR_VAR}"`, for numbers and booleans
they should be unquoted, e.g., `${INT_VAR}`, `${BOOL_VAR}`.
When using the `.deb` or `.rpm` packages, you can define environment variables
in the `/etc/default/telegraf` file.
@@ -55,14 +55,14 @@ INFLUX_PASSWORD="monkey123"
`/etc/telegraf.conf`:
```toml
[global_tags]
user = "$USER"
user = "${USER}"
[[inputs.mem]]
[[outputs.influxdb]]
urls = ["$INFLUX_URL"]
skip_database_creation = $INFLUX_SKIP_DATABASE_CREATION
password = "$INFLUX_PASSWORD"
urls = ["${INFLUX_URL}"]
skip_database_creation = ${INFLUX_SKIP_DATABASE_CREATION}
password = "${INFLUX_PASSWORD}"
```
The above files will produce the following effective configuration file to be