Nagios plugins for Ceph

A collection of nagios plugins to monitor a Ceph cluster.

Authentication

Ceph is normally configured to use cephx to authenticate its client.

To run the check_ceph_health or other plugins as user nagios you have to create a special keyring:

root# ceph auth get-or-create client.nagios mon 'allow r' > ceph.client.nagios.keyring

And use this keyring with the plugin:

nagios$ ./check_ceph_health --id nagios --keyring ceph.client.nagios.keyring

check_ceph_health

The check_ceph_health nagios plugin monitors the ceph cluster, and report its health. Can be filtered to only look at certain health checks.

Usage

usage: check_ceph_health [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-n NAME] [-i ID] [-k KEYRING] [-w WHITELIST] [-d]

'ceph health' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
  -c CONF, --conf CONF  alternative ceph conf file
  -m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor address[:port]
  -i ID, --id ID        ceph client id
  -n NAME, --name NAME  ceph client name
  -k KEYRING, --keyring KEYRING
                        ceph client keyring file
  --check CHECK         regexp of which check(s) to check (luminous+) Can be
                        inverted, e.g. '^((?!PG_DEGRADED|OBJECT_MISPLACED).)*$'
  -w, --whitelist REGEXP
                        whitelist regexp for ceph health warnings
  -d, --detail          exec 'ceph health detail'
  -V, --version         show version and exit

Example

nagios$ ./check_ceph_health --name client.nagios --keyring ceph.client.nagios.keyring
HEALTH WARNING: 1 pgs degraded; 1 pgs recovering; 1 pgs stuck unclean; recovery 4448/28924462 degraded (0.015%); 2/9857830 unfound (0.000%);
nagios$ echo $?
1
nagios$

nagios$ ./check_ceph_health --id nagios --whitelist 'requests.are.blocked(\s)*32.sec'

nagios$ ./check_ceph_health --id nagios
WARNING: MON_CLOCK_SKEW( clock skew detected on mon.a )
OBJECT_MISPLACED( 1937172/695961284 objects misplaced (0.278%) )
PG_DEGRADED( Degraded data redundancy: 98/695961284 objects degraded (0.000%), 1 pg degraded )

nagios$ ./check_ceph_health --id nagios --check 'PG_DEGRADED|OBJECT_MISPLACED'
WARNING: OBJECT_MISPLACED( 1937172/695961284 objects misplaced (0.278%) )
PG_DEGRADED( Degraded data redundancy: 98/695961284 objects degraded (0.000%), 1 pg degraded )

nagios$ ./check_ceph_health --id nagios --check '^((?!PG_DEGRADED|OBJECT_MISPLACED).)*$'
WARNING: MON_CLOCK_SKEW( clock skew detected on mon.a )

check_ceph_mon

The check_ceph_mon nagios plugin monitors an individual mon daemon, reporting its status.

Possible result includes OK (up), WARN (missing).

Usage

usage: check_ceph_mon [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-i ID]
                      [-k KEYRING] [-V] [-I MONID]

'ceph quorum_status' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
  -c CONF, --conf CONF  alternative ceph conf file
  -m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor to use for queries (address[:port])
  -i ID, --id ID        ceph client id
  -k KEYRING, --keyring KEYRING
                        ceph client keyring file
  -V, --version         show version and exit
  -I MONID, --monid MONID
                        mon ID to be checked for availability

Example

nagios$ ./check_ceph_mon -I node1
MON OK

nagios$ ./check_ceph_mon --monid node2
MON WARN: no mon 'node2' found in quorum

check_ceph_osd

The check_ceph_osd nagios plugin monitors an individual osd daemon or host, reporting its status.

Possible result includes OK (up), WARN (down or missing).

Usage

usage: check_ceph_osd [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-i ID]
                     [-k KEYRING] [-V] -H HOST [-I OSDID] [-o]

'ceph osd' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
  -c CONF, --conf CONF  alternative ceph conf file
  -m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor address[:port]
  -i ID, --id ID        ceph client id
  -k KEYRING, --keyring KEYRING
                        ceph client keyring file
  -V, --version         show version and exit
  -H HOST, --host HOST  osd host
  -I OSDID, --osdid OSDID
                        osd id
  -o, --out             check osds that are set OUT

Example

nagios$ ./check_ceph_osd -H 172.17.0.2 -I 0
OSD OK

nagios$ ./check_ceph_osd -H 172.17.0.2 -I 0
OSD WARN: OSD.0 is down at 172.17.0.2

nagios$ ./check_ceph_osd -H 172.17.0.2 -I 100
OSD WARN: no OSD.100 found at host 172.17.0.2

nagios$ ./check_ceph_osd -H 172.17.0.2
OSD WARN: Down OSD on 172.17.0.2: osd.0

check_ceph_rgw

The check_ceph_rgw nagios plugin monitors a ceph rados gateway, reporting its status and buckets usage.

Possible result includes OK (up), WARN (down or missing).

Usage

usage: check_ceph_rgw [-h] [-d] [-B] [-e EXE] [-c CONF] [-i ID] [-V]

'radosgw-admin bucket stats' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -d, --detail          output perf data for all buckets
  -B, --byte            output perf data in Byte instead of KB
  -e EXE, --exe EXE     radosgw-admin executable [/usr/bin/radosgw-admin]
  -c CONF, --conf CONF  alternative ceph conf file
  -i ID, --id ID        ceph client id
  -n NAME, --name NAME  ceph client name      
  -V, --version         show version and exit

Example

nagios$ ./check_ceph_rgw
RGW OK: 4 buckets, 102276 KB total | /=102276KB

nagios$ ./check_ceph_rgw --detail --byte
RGW OK: 4 buckets, 102276 KB total | /=104730624B bucket-test1=151552B bucket-test0=12288B bucket-test2=104566784B bucket-test=0B

check_ceph_rgw_api

The check_ceph_rgw_api nagios plugin monitors a ceph rados gateway, reporting its status and buckets usage.

Difference with `check_ceph_rgw`:

check_ceph_rgw is designed for connect to cluster, check_ceph_rgw_api is connected to radosgw directly via admin api. You can check each instance of radosgw or only one endpoint via proxy/balancer (or both).

Possible results

OK - bucket info recieved from radosgw;
WARNING - connected, but wrong admin entry or usage caps;
UNKNOWN - can't connect to proxy/balancer or radosgw directly;

Requirements

Install requests-aws python library:

pip install requests-aws

Configure admin entry point (default is 'admin'):

rgw admin entry = "admin"

Enable admin API (default is enabled):

rgw enable apis = "s3, admin"

Add capability buckets=read for your user who performed checks, see Admin Guide for more details.

Usage

usage: check_ceph_rgw_api [-h] -H HOST [-k] [-e ADMIN_ENTRY] -a ACCESS_KEY -s
                      SECRET_KEY [-d] [-b] [-v]

'radosgw api bucket stats' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -H HOST, --host HOST  Server URL for the radosgw api (example:
                        http://objects.dreamhost.com/)
  -k, --insecure        Allow insecure server connections when using SSL
  -e ADMIN_ENTRY, --admin_entry ADMIN_ENTRY
                        The entry point for an admin request URL [default is
                        'admin']
  -a ACCESS_KEY, --access_key ACCESS_KEY
                        S3 access key
  -s SECRET_KEY, --secret_key SECRET_KEY
                        S3 secret key
  -d, --detail          output perf data for all buckets
  -b, --byte            output perf data in Byte instead of KB
  -v, --version         show version and exit

Example

nagios$ ./check_ceph_rgw_api -H https://objects.dreamhost.com/ -a JXUABTZZYHAFLCMF9VYV -s jjP8RDD0R156atS6ACSy2vNdJLdEPM0TJQ5jD1pw
RGW OK: 1 buckets, 7696 KB total | /=7696KB

nagios$ ./check_ceph_rgw_api -H objects.dreamhost.com -a JXUABTZZYHAFLCMF9VYV -s jjP8RDD0R156atS6ACSy2vNdJLdEPM0TJQ5jD1pw --detail --byte
RGW OK: 1 buckets, 7696 KB total | /=7880704B k0ste=7880704B

check_ceph_df

The check_ceph_df nagios plugin monitors a ceph cluster, reporting its percentual RAW capacity usage, or specific pool usage.

Possible result includes OK, WARN and CRITICAL.

Usage

usage: check_ceph_df [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-i ID] [-n NAME]
                     [-k KEYRING] [-d] [-W WARN] [-C CRITICAL] [-V]

'ceph df' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
  -c CONF, --conf CONF  alternative ceph conf file
  -m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor address[:port]
  -i ID, --id ID        ceph client id
  -n NAME, --name NAME  ceph client name
  -k KEYRING, --keyring KEYRING
                        ceph client keyring file
  -p POOL, --pool POOL  ceph pool name
  -d, --detail          show pool details on warn and critical
  -W WARN, --warn WARN  warn above this percent RAW USED
  -C CRITICAL, --critical CRITICAL
                        critical alert above this percent RAW USED
  -V, --version         show version and exit

Example

nagios$ ./check_ceph_df -i nagios -k /etc/ceph/ceph.client.nagios.keyring -W 29.12 -C 30.22 -d
RAW usage 28.36%

nagios$ ./check_ceph_df -i nagios -k /etc/ceph/ceph.client.nagios.keyring -W 26.14 -C 30
WARNING: global RAW usage of 28.36% is above 26.14% (783G of 1093G free)

nagios$ ./check_ceph_df -i nagios -k /etc/ceph/ceph.client.nagios.keyring -W 60 -C 70 -p hdd
CRITICAL: Pool 'hdd' usage of 71.71% is above 70.0% (9703G used)

nagios$ ./check_ceph_df -i nagios -k /etc/ceph/ceph.client.nagios.keyring -W 60 -C 70 -p nvme
CRITICAL: Pool 'nvme' usage of 76.08% is above 70.0% (223G used)

nagios$ ./check_ceph_df -i nagios -k /etc/ceph/ceph.client.nagios.keyring -W 26.14 -C 30 -d
WARNING: global RAW usage of 28.36% is above 26.14% (783G of 1093G free)

 POOLS:
     NAME                ID     USED       %USED     MAX AVAIL     OBJECTS
     rbd                 0      96137M      8.59          348G       24441
     cephfs_data         1      61785M      5.52          348G       99940
     cephfs_metadata     2      40380k         0          348G        8037
     libvirt-pool        3         145         0          348G           2

check_ceph_mds

The check_ceph_mds nagios plugin monitors an individual mds daemon, reporting its status.

Possible result includes OK, WARN (laggy) and Error (not found).

Usage

usage: check_ceph_mds [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-i ID]
                      [-k KEYRING] [-V] -n NAME -f FILESYSTEM

'ceph mds stat' nagios plugin.

optional arguments:
  -h, --help            show this help message and exit
  -e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
  -c CONF, --conf CONF  alternative ceph conf file
  -m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor to use for queries (address[:port])
  -i ID, --id ID        ceph client id
  -k KEYRING, --keyring KEYRING
                        ceph client keyring file
  -V, --version         show version and exit
  -n NAME, --name NAME  mds daemon name
  -f FILESYSTEM, --filesystem FILESYSTEM
                        mds filesystem name

Example

nagios$ ./check_ceph_mds -f cephfs -n ceph-mds-1
MDS OK: MDS 'ceph-mds-1' is up:active

nagios$ ./check_ceph_mds -f cephfs -n ceph-mds-2
MDS OK: MDS 'ceph-mds-2' is up:standby

nagios$ ./check_ceph_mds -f cephfs -n ceph-mds-1
MDS WARN: MDS 'ceph-mds-1' is up:active (laggy or crashed)

nagios$ ./check_ceph_mds -f cephfs -n ceph-mds-3
MDS ERROR: MDS 'ceph-mds-3' is not found (offline?)

check_ceph_mgr

The check_ceph_mgr nagios plugin monitors the mgr.

Usage

usage: check_ceph_mgr [-h] [-e EXE] [-c CONF] [-m MONADDRESS] [-i ID]
                    [-n NAME] [-k KEYRING] [-V]

'ceph mgr dump' nagios plugin.

optional arguments:
-h, --help            show this help message and exit
-e EXE, --exe EXE     ceph executable [/usr/bin/ceph]
-c CONF, --conf CONF  alternative ceph conf file
-m MONADDRESS, --monaddress MONADDRESS
                        ceph monitor to use for queries (address[:port])
-i ID, --id ID        ceph client id
-n NAME, --name NAME  ceph client name
-k KEYRING, --keyring KEYRING
                        ceph client keyring file
-V, --version         show version and exit

Example

nagios$ ./check_ceph_mgr
MGR OK: active: zhdk0013, standbys: zhdk0009, zhdk0025

check_ceph_osd_db

The check_ceph_osd_db checks the percentage usage of the BlueStore DB for the OSD and reports it as critical if it's above the threshold.

ceph/ceph-nagios-plugins

Nagios plugins for Ceph

Authentication

check_ceph_health

Usage

Example

check_ceph_mon

Usage

Example

check_ceph_osd

Usage

Example

check_ceph_rgw

Usage

Example

check_ceph_rgw_api

Difference with check_ceph_rgw:

Possible results

Requirements

Usage

Example

check_ceph_df

Usage

Example

check_ceph_mds

Usage

Example

check_ceph_mgr

Usage

Example

check_ceph_osd_db

Difference with `check_ceph_rgw`: