Ansible Role graylog_datanode
This role installs and configures a Graylog Data Node.
Currently supported versions:
6.1
Note that this role does NOT let you specify a particular Graylog Data Node version. It simply installs the latest available Graylog Data Node version from the repos configured in the system.
Known Limitations
To secure your data node(s), you can either upload an existing Certificate Authority (CA) or provision a certificate directly from the Graylog interface. This role does not currently support certificate handling - it assumes that you are using the automatic data node setup.
This role does not currently support more than one data node.
Mandatory Requirements
Sizing of disks:
/: at least 4 GB free disk space (create a 8+ GB partition)./var: at least 15 GB free disk space (create a 20+ GB partition).
If you use the „Setup Graylog Data Node“ Playbook, the following is automatically done for you:
Install MongoDB. This can be done using the linuxfabrik.lfops.mongodb role.
If you’re not using a versioned MongoDB repository, don’t forget to protect MongoDB from being updated with newer minor and major versions. This can be done using the linuxfabrik.lfops.dnf_versionlock role.
Enable the official Graylog repository. This can be done using the linuxfabrik.lfops.repo_graylog role.
Mandatory Role Variables
Variable |
Description |
|---|---|
|
String. You MUST set a secret that is used for password encryption and salting. The server refuses to start if this value is not set. The minimum length for |
Example:
# mandatory
graylog_datanode__password_secret: 'Linuxfabrik_GmbH'
Optional Role Variables
Variable |
Description |
Default Value |
|---|---|---|
|
String. The network interface used by the Graylog DataNode to bind all services. |
|
|
Number. The port where the DataNode REST api is listening. |
|
|
String. MongoDB connection string. See https://docs.mongodb.com/manual/reference/connection-string/ for details. |
|
|
String. Set this OpenSearch folder if you need OpenSearch to be located in a special place. |
|
Example:
# optional
graylog_datanode__bind_address: '127.0.0.1'
graylog_datanode__datanode_http_port: 8999
graylog_datanode__mongodb_uri: 'mongodb://127.0.0.1/graylog'
graylog_datanode__opensearch_data_location: '/data/opensearch'
Troubleshooting
Q: /bin/sh: /opt/python-venv/pymongo/bin/python3: No such file or directory
A: You either have to run the whole playbook, or python_venv directly: ansible-playbook --inventory myinv linuxfabrik.lfops.setup_graylog_datanode --tags python_venv