Splunk playbook Objectives

This playbook deploys configuration changes to setup a Splunk cluster with independent components.

Configure splunk nodes with common configuration
Setup certificates on Splunk nodes
Install a license on the License Master
Configure a Deployment Server
Install basic custom apps
Configure a Cluster Master
Add Search Heads to a cluster
Add Peer Nodes to a cluster
Configure universal forwarder (standalone)

Additional Role README info

Usage Requirements

Prior to using this playbook there are a few things that should be handled.

Make sure you have completed all the steps to Setup Ansible on your control machine
ansible > v2.5 needs to be installed on the control machine (you might need to upgrade)
The servers you intend to deploy Splunk on need to be built and running
Configure the inventory file like the hosts.example provided with this playbook
Clone this repo to your local machine
Read the Additional Role README info (all of them)
Downloaded Splunk package files and placed them in the correct folders (use latest versions if new install)
- Splunk_TA_nix add-on
  - roles/splunk-deployment-server/files/packages/splunk-add-on-for-unix-and-linux_xxx.tgz
- Grab any additional Splunk add-ons that may be in use and store them in the appropriate place
  - roles/splunk-deployment-server/files/packages/
Setup specific configurations in the secrets folder
- Create the secrets file at group_vars/secrets/secrets.yml from the example secrets.example
- Create the Splunk license file at group_vars/secrets/Splunk.License.lic using your Splunk license information
- Update the custom_packages file at group_vars/custom_files/custom_packages.yml with additional add-ons/apps info

Run this in a test environment first do not run in production without testing

Run the playbook like this:

ansible-playbook /path/to/splunk-staging.yml -u username --become --ask-become-pass (--check)

If you have additional groups setup in your /etc/ansible/hosts file, you can specify different host groups by passing --extra-vars="servers=HOSTGROUP". Multiple vars are supported.

ansible-playbook /path/to/splunk-staging.yml --extra-vars="servers=HOSTGROUP" -u username --become --ask-become-pass (--check)

Extra vars:

servers
lm_servers
ds_servers
cm_servers
search_servers
idx_servers
uf_servers - Only for Universal Forwarder role

Apply individual roles as needed using tags to run specific portions of the playbook.

ansible-playbook /path/to/splunk-staging.yml --tags splunk-staging -u username --become --ask-become-pass (--check)

The playbook will configure:

Setup base config on Splunk servers
- common:
  - Install required packages using apt and pip modules
- splunk-ca:
  - Check if CA key and certificate exist
  - Ensure existing certificate is still valid 2 weeks from now
  - Deploy openssl configuration items
  - Generate an OpenSSL CA private and public key
  - Generate a Self Signed OpenSSL CA certificate.
  - Generate an OpenSSL private key and CSR for client nodes
  - Generate a Signed OpenSSL certificate for client nodes
  - Generate an OpenSSL private key and CSR for wildcard cert
  - Generate a Signed OpenSSL certificate for wildcard cert
  - Copy keys and certs from CA to ansible machine for distribution
  - Distribute keys and certs to hosts
- splunk-kernel:
  - Setup disable-transparent-hugepages service
  - Set swappiness to 10 in /etc/sysctl.conf
  - Set ulimits for splunk user
- splunk-base:
  - Install Splunk from .deb package
  - Fix up perms after splunk user created
  - Sets default acl for splunk on /var/log
  - Distribute priv-key.pem, cert.pem, and ca-pubkey.pem to host
  - Remove a cert bundle if it exists to allow creation of new
  - Generate a cert bundle from artifacts or wildcard cert
  - Generate an OpenSSL private key for SplunkWeb
  - Generate an OpenSSL CSR for SplunkWeb
  - Generate a Self Signed OpenSSL certificate for SplunkWeb
  - Copy Splunk inputs.conf, web.conf, authentication.conf, and alert_actions.conf for system local
  - Create default admin user seed file
  - Accept Splunk license and set Splunk to start at boot using splunk user
  - Check passwd file contains current admin hash value
  - Reset Splunk admin password if changed
  - Set sslPassword using splunk_cluster_sslPassword
  - Add serverCert and sslRootCAPath to system/local server.conf
  - Add nodes to license master
  - TODO: Copy custom certs for Splunk Web
  - TODO: Configure LDAP for Splunk (optional)
Setup config on Splunk License Master
- splunk-license-master:
  - Create Enterprise licenses dir
  - Copy Splunk license file
  - Check if license already added
  - Install Splunk Enterprise license key
Setup config on Splunk Deployment Server
- splunk-deployment-server:
  - Enable Deployment Server
  - Create serverclass.conf to local system
  - Create initial org index apps directories
  - Create org_all_indexes app for deployment
  - Add custom mappings to indexes file for deployment
  - Create org_indexer_volume_indexes app for deployment
  - Create initial org_cluster_indexer_base apps directories
  - Copy Splunk org_cluster_indexer_base app for deployment
  - Create initial org_cluster_forwarder_outputs apps directories
  - Copy Splunk org_cluster_forwarder_outputs app.conf for deployment
  - Copy Splunk org_cluster_forwarder_outputs outputs.conf for deployment
  - Copy Splunk org_cluster_forwarder_outputs server.conf for deployment
  - Create initial org multisite apps directories
  - Create org_site_X_base apps for deployment
  - Create Splunkbase app directories
  - Configure deployer for search head cluster (optional)
  - TODO: Additional config for Deployment Server (more apps, serverclass settings etc)
Setup config on Splunk Cluster Master
- splunk-cluster-master:
  - Copy Splunk deploymentclient.conf for system
  - Check if clustering is enabled
  - Setup Cluster Master (Multisite or Singlesite)
  - Create initial index apps directories
  - Create Splunk CM server.conf for deployment
Setup config on Splunk Search Heads
- splunk-search-heads:
  - Check for custom roles file
  - Include roles from custom_roles.yml
  - Copy Splunk authorize.conf for system
  - Check if clustering is enabled
  - Add Search Heads to cluster (Multisite or Singlesite)
  - Configure search head clustering (optional)
  - TODO: Configure distributed search (optional)
Setup config on Splunk Peer Nodes
- splunk-peer-nodes:
  - Check if clustering is enabled
  - Add Peer Nodes to cluster (Multisite or Singlesite)

Run the UF playbook like this:

ansible-playbook /path/to/splunk-staging-UF.yml -u username --become --ask-become-pass (--check)

Specify a different deploy_stage value by passing --extra-vars="deploy_stage_value=VALUE". depending on the environment the UF is being deployed to.

ansible-playbook /path/to/splunk-staging-UF.yml --extra-vars="deploy_stage_value=staging" -u username --become --ask-become-pass (--check)

The UF playbook will configure:

Setup Splunk Universal Forwarder
- common:
  - Install required packages using apt and pip modules
- splunk-universal-forwarder:
  - Install Splunk from .deb package
  - Fix up perms after splunk user created
  - Sets default acl for splunk on /var/log
  - Ensure directory exists for local self-signed TLS certs.
  - Remove a cert bundle if it exists to allow creation of new
  - Distribute wildcard-priv-key.pem, wildcard-cert.pem to host
  - Generate a cert bundle from wildcard artifacts
  - Copy Splunk inputs.conf for system local
  - Copy Splunk web.conf for system
  - Use splunk hash-passwd to return a password hash
  - Check for user seed file
  - Check for passwd file
  - Create default admin user seed file
  - Accept Splunk license
  - Setup Splunk to start at boot with splunk user
  - Copy Splunk init for service
  - Check passwd file contains current admin hash value
  - Reset Splunk admin password if changed
  - Set sslPassword using splunk_cluster_sslPassword
  - Add serverCert to system/local server.conf
  - Add sslRootCAPath to system/local server.conf
  - Copy Splunk deploymentclient.conf for system

reshmaks/ansible-splunk-playbook

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