munin-monitoring / munin

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Build # 18387880490

Build Type

push

github

Committed by web-flow

Commit Message

df: add an example of name for the file (#1668)

I created a file with this config for the `df` plugin:

```
[df*]
env.warning 93
env.critical 98
```

I named it `/etc/munin/plugin-conf.d/df` and the settings were ignored.

Then I renamed it to `/etc/munin/plugin-conf.d/zz_df` and the settings
were applied.

It looks like my custom file must be read after
`/etc/munin/plugin-conf.d/munin-node`, so I used the `zz_` prefix.

I didn’t change the file `/etc/munin/plugin-conf.d/munin-node` to avoid
conflicts later when updating munin. It contains this configuration:

```
(…)
[df*]
env.warning 92
env.critical 98
env.exclude_re ^/run/user ^/var/lib/docker
(…)
```

### Test

```
# ls
df  dhcpd3  munin-node  README  spamstats
# munin-run --debug df
(…)
# Environment warning = 92
(…)
# mv -v df zz_df
renamed 'df' -> 'zz_df'
# munin-run --debug df
(…)
# Environment warning = 93
(…)
```

So yes the order of the files is important.

### Another proof

Files are processed by alphabetical order:

```
# munin-run --debug df
(…)
# Processing plugin configuration from /etc/munin/plugin-conf.d/README
# Processing plugin configuration from /etc/munin/plugin-conf.d/dhcpd3
# Processing plugin configuration from /etc/munin/plugin-conf.d/munin-node
# Processing plugin configuration from /etc/munin/plugin-conf.d/spamstats
# Processing plugin configuration from /etc/munin/plugin-conf.d/zz_df
```

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