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Host Setup

Some drivers require additional configuration to work. Find here instructions for these drivers.

Oracle Database Connection Pre-requisites

To get connected with the Oracle Database ORACLE_SID, ORACLE_BASE, ORACLE_HOME environment variables should be set.

For example: Let us consider Oracle Database 21c installation using RPM manually by following this link, environment variables should be set as follows:

export ORACLE_BASE=/opt/oracle/oradata
export ORACLE_HOME=/opt/oracle/product/21c/dbhome_1

Also, add ORACLE_HOME/bin to the PATH environment variable.

Oracle Instant Client Installation

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Oracle Instant Client enables the development and deployment of applications that connect to the Oracle Database. The Instant Client libraries provide the necessary network connectivity and advanced data features to make full use of the Oracle Database. If you have an OCI Oracle server which comes with these libraries pre-installed, you don’t need a separate client installation.

The OCI library installs a few Client Shared Libraries that must be referenced on the machine where Metricbeat is installed. Please follow this link for OCI Instant Client set up. The OCI Instant Client is available with the Oracle Universal Installer, RPM file or ZIP file. Download links can be found at here.

Enable Oracle Listener

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The Oracle listener is a service that runs on the database host and receives requests from Oracle clients. Make sure that listener should be running. To check if the listener is running or not, run:

lsnrctl STATUS

If the listener is not running, use the command to start:

lsnrctl START

Then, Metricbeat can be launched.

Host Configuration for Oracle

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The following types of host configuration are supported:

An old-style Oracle connection string, for backwards compatibility:
1. hosts: ["user/[email protected]:1521/ORCLPDB1.localdomain"]
2. hosts: ["user/[email protected]:1521/ORCLPDB1.localdomain as sysdba"]
DSN configuration as a URL:
1. hosts: ["oracle://user:[email protected]:1521/ORCLPDB1.localdomain?sysdba=1"]
DSN configuration as a logfmt-encoded parameter list:
1. hosts: ['user="user" password="pass" connectString="0.0.0.0:1521/ORCLPDB1.localdomain"']
2. hosts: ['user="user" password="password" connectString="host:port/service_name" sysdba=true']

DSN host configuration is the recommended configuration type as it supports the use of special characters in the password.

In a URL any special characters should be URL encoded.

In the logfmt-encoded DSN format, if the password contains a backslash character (\), it must be escaped with another backslash. For example, if the password is my\_password, it must be written as my\\_password.

The username and password to connect to the database can be provided as values to the username and password keys of sql.yml.

- module: sql
  metricsets:
    - query
  period: 10s
  driver: "oracle"
  enabled: true
  hosts: ['user="" password="" connectString="0.0.0.0:1521/ORCLCDB.localdomain" sysdba=true']
  username: sys
  password: password
  sql_queries:
  - query: SELECT METRIC_NAME, VALUE FROM V$SYSMETRIC WHERE GROUP_ID = 2 and METRIC_NAME LIKE '%'
    response_format: variables

Example configuration

The SQL module supports the standard configuration options that are described in Modules. Here is an example configuration:

metricbeat.modules:
- module: sql
  metricsets:
    - query
  period: 10s
  hosts: ["user=myuser password=mypassword dbname=mydb sslmode=disable"]

  driver: "postgres"
  sql_query: "select now()"
  sql_response_format: table

Metricsets

The following metricsets are available:

query

« SQL module SQL query metricset »