MongoDB exporter

This is the new MongoDB exporter implementation that handles ALL metrics exposed by MongoDB monitoring commands. This new implementation loops over all the fields exposed in diagnostic commands and tries to get data from them.

Currently, these metric sources are implemented:

• $collStats
• $indexStats
• getDiagnosticData
• replSetGetStatus
• serverStatus

Old Percona MongoDB exporter
old 0.1x.y version (ex master branch) is moved to the release-0.1x branch.
If you considering migrating from the old version of the exporter - you can
use flag --compatible-mode to expose metrics in the old metric names. This
will simplify migration to the new version for you.

Flags

Flag	Description	Example
-h, --help	Show context-sensitive help
--compatible-mode	Exposes new metrics in the new and old format at the same time
--discovering-mode	Enable autodiscover collections from databases which set in collstats-colls and indexstats-colls
--mongodb.collstats-colls	List of comma separated databases.collections to get stats	--mongodb.collstats-colls=testdb.testcol1,testdb.testcol2
--mongodb.direct-connect	Whether or not a direct connect should be made. Direct connections are not valid if multiple hosts are specified or an SRV URI is used	--mongodb.direct-connect=false
--mongodb.indexstats-colls	List of comma separated database.collections to get index stats	--mongodb.indexstats-colls=db1.col1,db1.col2
--mongodb.uri	MongoDB connection URI ($MONGODB_URI)	--mongodb.uri=mongodb://user:pass@127.0.0.1:27017/admin?ssl=true
--mongodb.global-conn-pool	Use global connection pool instead of creating new connection for each http request.
--web.listen-address	Address to listen on for web interface and telemetry	--web.listen-address=":9216"
--web.telemetry-path	Metrics expose path	--web.telemetry-path="/metrics"
--log.level	Only log messages with the given severity or above. Valid levels: [debug, info, warn, error]	--log.level="error"
--disable.diagnosticdata	Disable collecting metrics from getDiagnosticData
--disable.replicasetstatus	Disable collecting metrics from replSetGetStatus
--disable.dbstats	Disable collecting metrics from dbStats
--version	Show version and exit

Build the exporter

The build process uses the dockerized version of goreleaser so you don't need to install Go. Just run make release and the new binaries will be generated under the build directory.

├── build
│ ├── config.yaml
│ ├── mongodb_exporter_7c73946_checksums.txt
│ ├── mongodb_exporter-7c73946.darwin-amd64.tar.gz
│ ├── mongodb_exporter-7c73946.linux-amd64.tar.gz
│ ├── mongodb_exporter_darwin_amd64
│ │ └── mongodb_exporter <--- MacOS binary
│ └── mongodb_exporter_linux_amd64
│ └── mongodb_exporter <--- Linux binary

Running the exporter

If you built the exporter using the method mentioned in the previous section, the generated binaries are in mongodb_exporter_linux_amd64/mongodb_exporter or mongodb_exporter_darwin_amd64/mongodb_exporter

Permissions

Connecting user should have sufficient rights to query needed stats:

      {
         "role":"clusterMonitor",
         "db":"admin"
      },
      {
         "role":"read",
         "db":"local"
      }

More info about roles in MongoDB documentation.

Example

mongodb_exporter_linux_amd64/mongodb_exporter --mongodb.uri=mongodb://127.0.0.1:17001

Enabling collstats metrics gathering

--mongodb.collstats-colls receives a list of databases and collections to monitor using collstats. Usage example: --mongodb.collstats-colls=database1.collection1,database2.collection2

mongodb_exporter_linux_amd64/mongodb_exporter --mongodb.uri=mongodb://127.0.0.1:17001 --mongodb.collstats-colls=db1.c1,db2.c2

Enabling compatibility mode.

When compatibility mode is enabled by the --compatible-mode, the exporter will expose all new metrics with the new naming and labeling schema and at the same time will expose metrics in the version 1 compatible way. For example, if compatibility mode is enabled, the metric mongodb_ss_wt_log_log_bytes_written (new format)

# HELP mongodb_ss_wt_log_log_bytes_written serverStatus.wiredTiger.log.
# TYPE mongodb_ss_wt_log_log_bytes_written untyped
mongodb_ss_wt_log_log_bytes_written 2.6208e+06

will be also exposed as mongodb_mongod_wiredtiger_log_bytes_total with the unwritten label.

HELP mongodb_mongod_wiredtiger_log_bytes_total mongodb_mongod_wiredtiger_log_bytes_total
# TYPE mongodb_mongod_wiredtiger_log_bytes_total untyped
mongodb_mongod_wiredtiger_log_bytes_total{type="unwritten"} 2.6208e+06

Submitting Bug Reports and adding new functionality

please see Contribution Guide