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Tutorial.md

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Splunk Enterprise and Universal Forwarder in Docker

Directory Structure

  • ansible => Directory with ansible playbooks and logic
  • configs => Configuration directory with mapping and serverList

Naming convention

  • es => Splunk Enterprise
  • uf => Splunk Universal Forwarder
  • clm => cluster master
  • dep => deployment manager
  • lic => License master
  • shc => search head cluster
  • sta => standalone splunk enterprise
  • idx => indexer
  • fwd => forwarder

Operation

>> Pre-requisite

  • Software Stack => Docker, Docker-compose, Python, Ansible, Linux or MacOs
  • Permissions => Root Permissions or equivalent (become in Ansible, to port forward etc, Ability to add your user to docker)
  • Load the relevant Splunk and Universal Forwarder docker image into your docker (docker pull splunk/splunk ; docker pull splunk/universalforwarder )
  • Ensure that images are tagged latest (eg: splunk/splunk:latest)
  • Ensure ansible (v2.3+) and ansible-playbook (v2.3+) are installed
  • Compute of 16GB RAM & 8 Cores Minimum
  • Atleast 20GB of available space in /tmp (or chosen) filesystem (for creating Splunk artefacts.)

>> To run this package

Clone the Repository and then follow steps below

sudo usermod -aG docker $USER
cd ansible
# Standalone
ansible-playbook -i hosts -c local main_playbooks/sta.yml -K

# SHC - Search Head Cluster
ansible-playbook -i hosts -c local main_playbooks/shc.yml -K
  • Please wait until the application starts by checking the Status (docker ps)

Cleanup

# Cleanup running containers
cd ansible
# Standalone
ansible-playbook -i hosts -c local adhoc_playbooks/docker_cleanup_sta.yml 
sudo rm -rf /tmp/jinja

# SHC - Search Head Cluster
ansible-playbook -i hosts -c local adhoc_playbooks/docker_cleanup_shc.yml

The above will run and create a Splunk Standalone environment. The script can accept parameters to build shc Refer to ansible/example_commands.txt for further options to run including cluster

After Cluster is started (SHC cluster)

  • Below is NOT applicable to sta, but only for clustered shc
  • Run docker ps and find the mapping of server to Port. This port is as per mapping in configs
  • To access UI as localhost: (eg http://localhost:9009)
  • Cluster Master & Search Heads will have UI enabled.
  • Password is modified to changedme. Please refer to ansible group_vars to change this.
  • Note this may take 5 minutes or so as it has to restart few times to configure cluster. Be patient..

Other Things to note

  • Ensure you always run docker clean command before you exit. Otherwise the docker containers might start automatically in your workstation next time. Clean commands examples in ansible/example_commands.txt
  • If you get permission denied errors for /tmp/jinja/xxx it is better to delete the whole directory /tmp/jinja and start again

TODO (Things pending)

  • Find solution to make Management Console Distributed mode on start. Currently it comes-up as standalone
  • Distribute PEM keys to all search Heads. Partially done.

Other Partial running for DEVELOPMENT

inputTag=sta
ansible-playbook -i hosts -c local adhoc_playbooks/app_build.yml  -e "inputTag=$inputTag" 
ansible-playbook -i hosts -c local adhoc_playbooks/compose_build.yml  -e "inputTag=$inputTag" --skip-tags=copy_apps