Munin contributed plugins

[exodus_] Add plugin to monitore number of applications, reports and trackers (#1286)

Add monitoring of count for applications, reports and trackers of an
exodus instance.

Add zswap Plugin

[whois] Allow to specificy whois server per domain

Also, clean up some old code that pre-dates multi-domain handling

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

murmur-stats: Enhancements

- python3 compatibility
- multigraph
- added muted/registered/unregistered users

added new plugin: "kernel_same_page_merging" (#1271)

repaired perldoc header: zfs_pool_dataset_count

repaired perldoc header: mikrotik_system

Merge branch 'enhance_mikrotik_system_with_error_return'

fix missing quote

convert get_name to a fallback function where board-name is first selected and if the name is set, then tat one will be used + trimming

get the correct name from the routerboard and replace all special characters with _

added the source for the catch function

use printf and pass variable to awk

use integers + fix bad blocks to be 5% max then the mikrotik needs to be reinstalled

Fix review comments

Signed-off-by: Nathaniel Clark <Nathaniel.Clark@misrule.us>

[minecraft-users-ram] Fix several bugs in plugin minecraft-users-ram_

Fixes:
- Make playercount work on non english systems
- Avoid getting an invalid PID if not run with sufficient permissions
- Fix getting CPU usage

Enhance:
- Clearify that CPU usage is in percent

Fix urllib request decoding

certificate_file_expiry: optional logarithmic view for long lived certs

logarithmic was removed in d885a314ade7c1287237d61f4d2b1f24db509533
but still has it's benefits for openvpn CA and CRL certs. when enabling
logarithmic we keep the SI units now instead of rrdtools default...

certificate_file_expiry: label "50" instead of "5e+01"

Scale values were "4e+01, 5e+01, ...". Using linear scale and "48, 50, 52, ..." is much more readable.

Also use shorter vlabel, old one is too long.

fixed file mode of mikrotik_system + added that it was rtested on RB493G

munin_events: fix plugin having too much output

in 56cd2c926ca99e396a0b6c2ebee76394bb4de195 "&> /dev/null" was converted
to posix in an invalid way, should have been ">/dev/null 2>&1"

munin-libvirtpy now in python3 (#1258)

• works on debian bullseye
• flake8 compatiblity ckecked
• print errors to file=sys.stderr

chrony_status: fix fetch output for serverstats graph

Was not expecting #1255 to be merged so quickly 🤪. Now the new
serverstats graph has been fully tested and actually works 😉.

This change also doesn't needlessly convert all values to floating
point numbers, instead provides the values to munin in the same format...

add zfs plugins (#1250)

add proxmox_vm_count plugin (#1251)

Count the number of running virtual machines in a proxmox environment.

zfs list -t filesystem,volume to suppress snapshots

zfs list might list a bunch of transient snapshots if `zpool
listsnapshots=on` and something like zfs-auto-snapshot is used. It's
also not useful to graph them since they're unchanging in time, and
the parent volume is graphed anyway. Limit zfs list to...

unit: add new plugin to monitor nginx unit app server

This multigraph plugin does basic monitoring of unit's applications.
See: https://unit.nginx.org/

systemd_mem: fix handling unlimited number on debian stretch

systemd_mem: add warning and critical from systemd config

fronius: support jq builds without math library

"round" is part of jq's math support. Some distros (rhel8) don't enable it.
Fortunately round can be emulated with "floor" which is always present in
modern jq.

Plugin dovecot: remove usage of "expr"

The usage of "expr" can be replaced easily with a shell builtin.
"expr" caused problems due to its hard-coded path.

Closes: #1240

plugin rsnapshot_duration: avoid "broken pipe" errors from tac

Consume the complete input from "tac". Otherwise spammy error messages
would appear in the log.

Fix switchbotmeter for pullreq https://github.com/munin-monitoring/contrib/pull/1236

Merge pull request #1235 from kmkr/master

Improve code readability and consistency

Reformat deluge_ with black and flake8

Improve code readability and consistency

This commit:

- Changes to Python 3 template string rather than the formatted string
syntax.
- Calls the Deluge API once per plugin run for the "states" mode, rather
than once per torrent. Lines of code are reduced. The readability is...

Plugin pacman_pending_updates: handle absence of available updates properly

"checkupdates" returns the exit code 2, if no updates are pending.
Previously the plugin did not output anything in this case.

Closes: #1233

Merge pull request #1058 from jtsage/add-template-munstrap4

Add "munstrap4" template.

rtom_vol: remove unused config parameters

Since there are no associated values for 'hashing', 'seeding', and
'active', a warning is seen in munin-update.log every time this plugin
is fetched.

bind9_*_stats: fix using env variable stat_file

previously only stat_file would only be used for data cleanup not for
fetching the data. also fixed some shellcheck warnings.

Merge pull request #1221 from shtrom/snmp__if_combined-stacked

Snmp if combined stacked

[snmp__if_combined] Add support for stacked series in root graph

From a summary comment in the code:

If a stacked graph is requested, plot the total. Rather than
    aggregating them with CDEFs of SUMs, we sum them in the script, which
    allows us to create real series than can be easily borrowed by other...

[snmp__if_combined] Fix issue with extrainfo

It was not collected / shown in the right spot, resulting in incorrect
information being shown.

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

[snmp__if_combined] use snmp v2 description for root traffic graph

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

[wunderground_] loan from other graphs in root

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

Merge pull request #1206 from kimheino/amavis-guap

amavis_multi: multigraph plugin to monitor amavis mail filter

Fix pod doc in header of file

Merge pull request #1217 from Wicloz/patch-1 (improve debian/debsecan_ plugin)

Add suggest capabilities to the debian/debsecan_ plugin.

Refactor script to pure POSIX sh compliance.

Also includes recommended fixes

Source the `os-release` file in a subshell