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Prometheus exporter for openGauss server metrics.
This package is available for Docker:
# Start an example database
docker run --net=host -it --rm -e GS_PASSWORD=mtkOP@128 enmotech/opengauss
# Connect to it
docker run --net=host -e DATA_SOURCE_NAME="postgresql://postgres:password@localhost:5432/postgres?sslmode=disable" enmotech/opengauss_exporter
The default make file behavior is to build the binary:
git clone https://gitee.com/opengauss/openGauss-prometheus-exporter.git
cd openGauss-prometheus-exporter
make build
export DATA_SOURCE_NAME="postgresql://login:password@hostname:port/dbname"
./bin/opengauss_exporter <flags>
To build the docker, run make docker.
The running user must match the database operations user
Query the socket file
postgres=# show unix_socket_directory;
unix_socket_directory
-----------------------
/tmp
(1 row)
Set Env
export PGHOST=/tmp
export PGPORT=26000
export PGUSER=omm
export PGDBNAME=postgres
or
export DATA_SOURCE_NAME="host=/tmp port=26000 user=omm dbname=postgres"
help
Show context-sensitive help (also try --help-long and --help-man).
web.listen-address
Address to listen on for web interface and telemetry. Default is :9187.
web.telemetry-path
Path under which to expose metrics. Default is /metrics.
disable-settings-metrics
Use the flag if you don't want to scrape pg_settings.
auto-discover-databases
Whether to discover the databases on a server dynamically.
config
Path to a YAML file containing queries to run. Check out og_exporter.yaml
for examples of the format.
--dry-run
Do not run - print the internal representation of the metric maps. Useful when debugging a custom
queries file.
constantLabels
Labels to set in all metrics. A list of label=value pairs, separated by commas.
version
Show application version.
exclude-databases
A list of databases to remove when autoDiscoverDatabases is enabled.
log.level
Set logging level: one of debug, info, warn, error, fatal
log.format
Set the log output target and format. e.g. logger:syslog?appname=bob&local=7 or logger:stdout?json=true
Defaults to logger:stderr.
The following environment variables configure the exporter:
OG_EXPORTER_URL PG_EXPORTER_URL DATA_SOURCE_NAME
the default legacy format. Accepts URI form and key=value form arguments. The
URI may contain the username and password to connect with.
OG_EXPORTER_WEB_LISTEN_ADDRESS
Address to listen on for web interface and telemetry. Default is :9187.
OG_EXPORTER_WEB_TELEMETRY_PATH
Path under which to expose metrics. Default is /metrics.
OG_EXPORTER_DISABLE_SETTINGS_METRICS
Use the flag if you don't want to scrape pg_settings. Value can be true or false. Default is false.
OG_EXPORTER_AUTO_DISCOVER_DATABASES
Whether to discover the databases on a server dynamically. Value can be true or false. Default is false.
OG_EXPORTER_CONSTANT_LABELS
Labels to set in all metrics. A list of label=value pairs, separated by commas.
OG_EXPORTER_EXCLUDE_DATABASES
A comma-separated list of databases to remove when autoDiscoverDatabases is enabled. Default is empty string.
Settings set by environment variables starting with OG_ will be overwritten by the corresponding CLI flag if given.
The openGauss server's data source name
must be set via the OG_EXPORTER_URL or PG_EXPORTER_URL or DATA_SOURCE_NAME environment variable.
Priorities are as follows
OG_EXPORTER_URL > PG_EXPORTER_URL > DATA_SOURCE_NAME
For running it locally on a default Debian/Ubuntu install, this will work (transpose to init script as appropriate):
DATA_SOURCE_NAME="user=postgres host=/var/run/postgresql/ sslmode=disable" opengauss_exporter
Also, you can set a list of sources to scrape different instances from the one exporter setup. Just define a comma separated string.
DATA_SOURCE_NAME="port=5432,port=6432" opengauss_exporter
See the github.com/lib/pq module for other ways to format the connection string.
If you define connection strings for multiple databases, database version consistency is required export DATA_SOURCE_NAME=postgresql://gaussdb:password@127.0.0.1:26000/postgres?sslmode=disable,postgresql://gaussdb:password@127.0.0.1:26001/postgres?sslmode=disable
The --config command-line argument specifies a YAML file containing additional queries to run. Some examples are provided in og_exporter.yaml.
To scrape metrics from all databases on a database server, the database DSN's can be dynamically discovered via the
--auto-discover-databases flag. When true, SELECT datname FROM pg_database WHERE datallowconn = true AND datistemplate = false and datname != current_database() is run for all configured DSN's. From the
result a new set of DSN's is created for which the metrics are scraped.
In addition, the option --exclude-databases adds the possibily to filter the result from the auto discovery to discard databases you do not need.
make build
cd test;sh test.sh ../bin/opengauss_exporter <config_file>
CREATE USER dbuser_monitor with login monadmin PASSWORD 'Mon@1234';
grant usage on schema dbe_perf to dbuser_monitor;
grant select on pg_stat_replication to dbuser_monitor;
·
docker network create opengauss_network --subnet=172.11.0.0/24
docker run --network opengauss_network --ip 172.11.0.101 \
--privileged=true --name opengauss_primary -h opengauss_primary -p 1111:5432 -d \
-e GS_PORT=5432 -e OG_SUBNET=172.11.0.0/24 -e GS_PASSWORD=Gauss@123 -e NODE_NAME=opengauss_primary \
-e 'REPL_CONN_INFO=replconninfo1 = '\''localhost=172.11.0.101 localport=5434 localservice=5432 remotehost=172.11.0.102 remoteport=5434 remoteservice=5432'\''\n' enmotech/opengauss:1.1.0 -M primary
docker run --network opengauss_network --ip 172.11.0.102 \
--privileged=true --name opengauss_standby1 -h opengauss_standby1 -p 1112:5432 -d \
-e GS_PORT=5432 -e OG_SUBNET=172.11.0.0/24 -e GS_PASSWORD=Gauss@123 -e NODE_NAME=opengauss_standby1 \
-e 'REPL_CONN_INFO=replconninfo1 = '\''localhost=172.11.0.102 localport=5434 localservice=5432 remotehost=172.11.0.101 remoteport=5434 remoteservice=5432'\''\n' enmotech/opengauss:1.1.0 -M standby
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