Examples

docker-splunk

The purpose of this section is to showcase a wide variety of examples on how the docker-splunk project can be used.

Note that for more complex scenarios, we will opt to use a Docker compose file instead of the CLI for the sake of readability.

I want to…

Create standalone from CLI

Execute the following to bring up your deployment:

$ docker run --name so1 --hostname so1 -p 8000:8000 \
              -e "SPLUNK_PASSWORD=<password>" \
              -e "SPLUNK_START_ARGS=--accept-license" \
              -it splunk/splunk:latest

Create standalone from compose

docker-compose.yml

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create standalone with license

Adding a Splunk Enterprise license can be done in multiple ways. Review the following compose files below to see how it can be achieved, either with a license hosted on a webserver or with a license file as a direct mount.

docker-compose.yml - license from URL

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_LICENSE_URI=http://company.com/path/to/splunk.lic
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000

docker-compose.yml - license from file

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_LICENSE_URI=/tmp/license/splunk.lic
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000
    volumes:
      - ./splunk.lic:/tmp/license/splunk.lic

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create standalone with HEC

To learn more about the HTTP Event Collector (HEC) and how to use it, see Set up and use HTTP Event Collector.

docker-compose.yml

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_HEC_TOKEN=abcd1234
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000
      - 8088:8088

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

To validate HEC is provisioned properly and functional:

$ curl -k https://localhost:8088/services/collector/event -H "Authorization: Splunk abcd1234" -d '{"event": "hello world"}'
{"text": "Success", "code": 0}

Create standalone with app

Splunk apps can also be installed using this Docker image.

docker-compose.yml

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_APPS_URL=http://company.com/path/to/app.tgz
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create standalone with SplunkBase app

Apps showcased on SplunkBase can also be installed using this Docker image.

docker-compose.yml

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_APPS_URL=https://splunkbase.splunk.com/app/2890/release/4.1.0/download
      - SPLUNKBASE_USERNAME=&lt;username&gt;
      - SPLUNKBASE_PASSWORD
      - SPLUNK_PASSWORD
    ports:
      - 8000:8000

Execute the following to bring up your deployment:

$ SPLUNKBASE_PASSWORD=<splunkbase_password> SPLUNK_PASSWORD=<password> docker-compose up -d

Create standalone with SSL enabled

To enable SSL over SplunkWeb, you’ll first need to generate your self-signed certificates. Please see the Splunk docs on how to go about doing this. For the purposes of local development, you can use:

openssl req -x509 -newkey rsa:4096 -passout pass:abcd1234 -keyout /home/key.pem -out /home/cert.pem -days 365 -subj /CN=localhost

Once you have your certificates available, you can execute the following to bring up your deployment with SSL enabled on the Splunk Web UI:

$ docker run --name so1 --hostname so1 -p 8000:8000 \
              -e "SPLUNK_HTTP_ENABLESSL=true" \
              -e "SPLUNK_HTTP_ENABLESSL_CERT=/home/cert.pem" \
              -e "SPLUNK_HTTP_ENABLESSL_PRIVKEY=/home/key.pem" \
              -e "SPLUNK_HTTP_ENABLESSL_PRIVKEY_PASSWORD=abcd1234" \
              -e "SPLUNK_PASSWORD=<password>" \
              -e "SPLUNK_START_ARGS=--accept-license" \
              -v /home:/home \
              -it splunk/splunk:latest

Create standalone with Splunk Free license

Splunk Free is the totally free version of Splunk software. The Free license lets you index up to 500 MB per day and will never expire.

Execute the following to bring up a Splunk Free standalone environment:

$ docker run --name so1 --hostname so1 -p 8000:8000 \
              -e "SPLUNK_PASSWORD=<password>" \
              -e "SPLUNK_START_ARGS=--accept-license" \
              -e "SPLUNK_LICENSE_URI=Free" \
              -it splunk/splunk:latest

Create sidecar root forwarder

k8s-sidecar.yml

apiVersion: v1
kind: Pod
metadata:
  name: example
spec:
  securityContext:
    runAsUser: 0
    runAsGroup: 0
  containers:
  - name: splunk-uf
    image: splunk/universalforwarder:latest
    env:
    - name: SPLUNK_START_ARGS
      value: --accept-license
    - name: SPLUNK_USER
      value: root
    - name: SPLUNK_GROUP
      value: root
    - name: SPLUNK_PASSWORD
      value: helloworld
    - name: SPLUNK_CMD
      value: add monitor /var/log/
    - name: SPLUNK_STANDALONE_URL
      value: splunk.company.internal
    volumeMounts:
    - name: shared-data
      mountPath: /var/log
  - name: my-app
    image: my-app
    volumeMounts:
    - name: shared-data
      mountPath: /app/logs/
  volumes:
  - name: shared-data
    emptyDir: {}

Execute the following to bring up your deployment:

$ kubectl apply -f k8s-sidecar.yml

Alternatively, if you’re not using Kubernetes you can use the Docker CLI to bring up the Universal Forwarder under the root user with the following:

$ docker run -d -P --user root -e SPLUNK_START_ARGS=--accept-license -e SPLUNK_PASSWORD=helloworld -e SPLUNK_USER=root -e SPLUNK_GROUP=root splunk/universalforwarder:latest

After your pod is ready, the universal forwarder will be reading the logs generated by your app via the shared volume mount. In the ideal case, your app is generating the logs while the forwarder is reading them and streaming the output to a separate Splunk instance located at splunk.company.internal.

Create standalone and universal forwarder

You can also enable distributed deployments. In this case, we can create a Splunk universal forwarder running in a container to stream logs to a Splunk standalone, also running in a container.

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  uf1:
    networks:
      splunknet:
        aliases:
          - uf1
    image: ${UF_IMAGE:-splunk/universalforwarder:latest}
    hostname: uf1
    container_name: uf1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_STANDALONE_URL=so1
      - SPLUNK_ADD=udp 1514,monitor /var/log/*
      - SPLUNK_PASSWORD
    ports:
      - 8089

  so1:
    networks:
      splunknet:
        aliases:
          - so1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: so1
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_STANDALONE_URL=so1
      - SPLUNK_PASSWORD
    ports:
      - 8000
      - 8089

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create heavy forwarder

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  hf1:
    networks:
      splunknet:
        aliases:
          - hf1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: hf1
    container_name: hf1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_ROLE=splunk_heavy_forwarder
      - SPLUNK_INDEXER_URL=idx1-splunk.company.internal
      - SPLUNK_ADD=tcp 1514
      - SPLUNK_PASSWORD
    ports:
      - 1514

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create heavy forwarder and deployment server

The following will allow you spin up a forwarder, and stream its logs to an independent, external indexer located at idx1-splunk.company.internal, as long as that hostname is reachable on your network. Additionally, it brings up a deployment server, which will download an app and distribute it to the heavy forwarder.

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  hf1:
    networks:
      splunknet:
        aliases:
          - hf1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: hf1
    container_name: hf1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_ROLE=splunk_heavy_forwarder
      - SPLUNK_INDEXER_URL=idx1-splunk.company.internal
      - SPLUNK_DEPLOYMENT_SERVER=depserver1
      - SPLUNK_ADD=tcp 1514
      - SPLUNK_PASSWORD
    ports:
      - 1514

  depserver1:
    networks:
      splunknet:
        aliases:
          - depserver1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: depserver1
    container_name: depserver1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_ROLE=splunk_deployment_server
      - SPLUNK_APPS_URL=https://artifact.company.internal/splunk_app.tgz
      - SPLUNK_PASSWORD

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create indexer cluster

To enable indexer cluster, we’ll need to generate some common passwords and secret keys across all members of the deployment. To facilitate this, you can use the splunk/splunk image with the create-defaults command as so:

$ docker run -it -e SPLUNK_PASSWORD=<password> splunk/splunk:latest create-defaults > default.yml

Additionally, review the docker-compose.yml below to understand how linking Splunk instances together through roles and environment variables is accomplished:

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  sh1:
    networks:
      splunknet:
        aliases:
          - sh1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh1
    container_name: sh1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_search_head
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  cm1:
    networks:
      splunknet:
        aliases:
          - cm1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    command: start
    hostname: cm1
    container_name: cm1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_cluster_master
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx1:
    networks:
      splunknet:
        aliases:
          - idx1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    command: start
    hostname: idx1
    container_name: idx1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx2:
    networks:
      splunknet:
        aliases:
          - idx2
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    command: start
    hostname: idx2
    container_name: idx2
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx3:
    networks:
      splunknet:
        aliases:
          - idx3
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    command: start
    hostname: idx3
    container_name: idx3
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Create search head cluster

To enable search head clustering, we’ll need to generate some common passwords and secret keys across all members of the deployment. To facilitate this, you can use the splunk/splunk image with the create-defaults command as so:

$ docker run -it -e SPLUNK_PASSWORD=<password> splunk/splunk:latest create-defaults > default.yml

Additionally, review the docker-compose.yml below to understand how linking Splunk instances together through roles and environment variables is accomplished:

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  sh1:
    networks:
      splunknet:
        aliases:
          - sh1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh1
    container_name: sh1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_ROLE=splunk_search_head_captain
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  sh2:
    networks:
      splunknet:
        aliases:
          - sh2
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh2
    container_name: sh2
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_ROLE=splunk_search_head
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  sh3:
    networks:
      splunknet:
        aliases:
          - sh3
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh3
    container_name: sh3
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_ROLE=splunk_search_head
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  dep1:
    networks:
      splunknet:
        aliases:
          - dep1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: dep1
    container_name: dep1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_ROLE=splunk_deployer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx1:
    networks:
      splunknet:
        aliases:
          - idx1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: idx1
    container_name: idx1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_ROLE=splunk_indexer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

Execute the following to bring up your deployment:

Create indexer cluster and search head cluster

To enable both clustering modes, we’ll need to generate some common passwords and secret keys across all members of the deployment. To facilitate this, you can use the splunk/splunk image with the create-defaults command as so:

$ docker run -it -e SPLUNK_PASSWORD=<password> splunk/splunk:latest create-defaults > default.yml

Additionally, review the docker-compose.yml below to understand how linking Splunk instances together through roles and environment variables is accomplished:

docker-compose.yml

version: "3.6"

networks:
  splunknet:
    driver: bridge
    attachable: true

services:
  sh1:
    networks:
      splunknet:
        aliases:
          - sh1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh1
    container_name: sh1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_search_head_captain
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  sh2:
    networks:
      splunknet:
        aliases:
          - sh2
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh2
    container_name: sh2
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_search_head
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  sh3:
    networks:
      splunknet:
        aliases:
          - sh3
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: sh3
    container_name: sh3
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_search_head
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  dep1:
    networks:
      splunknet:
        aliases:
          - dep1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: dep1
    container_name: dep1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_deployer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  cm1:
    networks:
      splunknet:
        aliases:
          - cm1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: cm1
    container_name: cm1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_cluster_master
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx1:
    networks:
      splunknet:
        aliases:
          - idx1
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: idx1
    container_name: idx1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx2:
    networks:
      splunknet:
        aliases:
          - idx2
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: idx2
    container_name: idx2
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

  idx3:
    networks:
      splunknet:
        aliases:
          - idx3
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    hostname: idx3
    container_name: idx3
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_INDEXER_URL=idx1,idx2,idx3
      - SPLUNK_SEARCH_HEAD_URL=sh2,sh3
      - SPLUNK_SEARCH_HEAD_CAPTAIN_URL=sh1
      - SPLUNK_CLUSTER_MASTER_URL=cm1
      - SPLUNK_ROLE=splunk_indexer
      - SPLUNK_DEPLOYER_URL=dep1
    ports:
      - 8000
      - 8089
    volumes:
      - ./default.yml:/tmp/defaults/default.yml

Execute the following to bring up your deployment:

Enable root endpoint on SplunkWeb

docker-compose.yml

version: "3.6"

services:
  so1:
    image: ${SPLUNK_IMAGE:-splunk/splunk:latest}
    container_name: so1
    environment:
      - SPLUNK_START_ARGS=--accept-license
      - SPLUNK_ROOT_ENDPOINT=/splunkweb
      - SPLUNK_PASSWORD
    ports:
      - 8000

Execute the following to bring up your deployment:

$ SPLUNK_PASSWORD=<password> docker-compose up -d

Then, visit SplunkWeb on your browser with the root endpoint in the URL, such as http://localhost:8000/splunkweb.

There are a variety of Docker compose scenarios in the docker-splunk repo here. Feel free to use any of those for reference in deploying different topologies!

docker-splunk

I want to…

Create standalone from CLI

Create standalone from compose

Create standalone with license

Create standalone with HEC

Create standalone with app

Create standalone with SplunkBase app

Create standalone with SSL enabled

Create standalone with Splunk Free license

Create sidecar root forwarder

Create standalone and universal forwarder

Create heavy forwarder

Create heavy forwarder and deployment server

Create indexer cluster

Create search head cluster

Create indexer cluster and search head cluster

Enable root endpoint on SplunkWeb

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