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Splunk

To scrape and send audit log data to a Splunk server using the web console or the command line (RCTL).

Use the web console to configure your audit logs.

Prerequisites

Configure Workload

Note: Only one audit log workload is needed for an organization.

  1. In the web console, select Catalog.
  2. For Filter by Catalog, select default-rafay. Repositories
  3. Select rafay-splunk, then select Create Workload. Create Workload
  4. Enter a name for the workload. Example: rafay-audit-logs.
  5. Select the namespace. New Repository
  6. Click Continue.
  7. On the Repository tab, for Values yaml:
  8. Click Save and Go to Placement.
  9. Update the following for Placements:
    • Select the appropriate Drift Action.
    • Select Specified Clusters for the Placement Policy.
    • Select the cluster from the cluster list.
    • Click Save and go to Publish.
  10. Click Publish.

Use the Command Line Interface (RCTL) to automate reproducible workflows without having to use the web console.

Prerequisites

Note: Set the correct project using RCTL.

Create a Repository

Create a repository.yaml file using the following example. Replace demo with the name of the project you are adding this repository to. Optionally, you can change helm-repo to another name; if you change the name, use that name for repository_ref in the workload.yaml file (see Create a Workload). 

apiVersion: config.rafay.dev/v2
kind: Repository
metadata:
  name: helm-repo
  project: demo
spec:
  repositoryType: HelmRepository
  endpoint: https://rafaysystems.github.io/rafay-helm-charts/
  credentialType: CredentialTypeNotSet

Run the create repository command and include the repository.yaml file. 

./rctl create repository -f repository.yaml

Create a Workload

Create a workload.yaml file using the following example. Replace the names used in clusters, namespace, and project to match your environment where you want to publish the workload. 

name: audit-logs
namespace: ns-name
type: Helm
project: demo
clusters: demo-cluster
repository_ref: helm-repo
repo_artifact_meta:
  helm:
    chartName: rafay-splunk
values: ./values.yaml

Run the create workload command and include the workload.yaml file. 

./rctl create workload workload.yaml

Publish a Workload

Run the publish workload command. Replace workload-name with the name used in the workload.yaml file. Example: audit-logs. 

./rctl publish workload workload-name

Values YAML File

Create a values.yaml file that contains your Splunk information. Use the example below and change the following:

  • rafay_api_key - Your organization's API key. In the web console, select My Tools > Manage Keys.
  • rafay_api_secret - Your organization's API Secret key. In the web console, select My Tools > Manage Keys.
  • host - The root domain of your Splunk Server. You can find this in the URL field after you log in to your Splunk console. Example: splunkserver.mycompany.com.
  • index - The name of the Splunk index. (See below for creating a Splunk index)
  • ssl_verify (Optional) - Only change to False if you are using an insecure Splunk server.
  • token - The Splunk HTTP Event Collector (Splunk HEC) token value. (See below for creating a Splunk HEC)
  • secret_name - (Optional) Specify existing k8s secret name that contains your organization's API key, secret and splunk token. (See below is an example of k8s secret)
# Default values for rafay splunk audit log integration.
# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

config:
  ## Rafay console URL
  url: https://console.rafay.dev
  ## Rafay API Key
  rafay_api_key: RAFAY_API_KEY
  ## Rafay API Secret
  rafay_api_secret: RAFAY_API_SECRET
  ## Send Initial logs to splunk adog based on following value. Defaults to "14d" days
  filter: 14d
  ## Time Interval to send logs to splunk
  interval: 1m
  ## Splunk Server Host
  host: splunkserver.mycompany.com
  ## Splunk Server Port
  port: 8088
  ## Splunk HEC Token
  splunk_token: SPLUNK_TOKEN
  ## Set to False for insecure splunk server
  ssl_verify: True
  ## Index name to store audit logs to
  index: k8s-cluster-audit
  ## Existning Secret Name or leave it empty
  secret_name: ""
image:
  repository: registry.rafay-edge.net/rafay-logs/rafay-splunk
  pullPolicy: Always
  # Overrides the image tag whose default is the chart appVersion.
  tag: 0.3.7
serviceAccount:
  # Specifies whether a service account should be created
  create: true
  # Annotations to add to the service account
  annotations: {}
  # The name of the service account to use.
  # If not set and create is true, a name is generated using the fullname template
  name:
rbac:
  create: true  
replicaCount: 1
imagePullSecrets: []
nameOverride: ""
fullnameOverride: ""
deploymentAnnotations: {}
podAnnotations: {}
resources: {}
  # We usually recommend not to specify default resources and to leave this as a conscious
  # choice for the user. This also increases chances charts run on environments with little
  # resources, such as Minikube. If you do want to specify resources, uncomment the following
  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
  # limits:
  #   cpu: 100m
  #   memory: 128Mi
  # requests:
  #   cpu: 100m
  #   memory: 128Mi
nodeSelector: {}
tolerations: []
affinity: {}

Creating a Splunk Index

  1. In the Splunk console, select Settings > Indexes.
  2. Click New Index.
  3. Enter a name for the index. Example: audit-logs-splunk.
  4. Make sure Events is selected.
  5. For Max raw data size, enter the maximum size of the index. Example: 2GB.
  6. For Searchable time (days), enter the number of days to include in the search results. Example: 30 days.
  7. Click Save.
  8. Copy the index name and paste it for the index in the values.yaml file.

Creating a Splunk HEC

Create a Splunk HTTP Event Collector (HEC).

  1. In the Splunk console, select Settings > Data Inputs.
  2. Click HTTP Event Collector.
  3. Click New Token.
  4. Enter a name for the collector (example: audit-Logs), then click Next.
  5. For Source type, click Select, type json, then select _json.
  6. Click Review.
  7. Click Submit.
  8. Copy the token value and paste it for the token in the values.yaml file. 

apiVersion: v1
kind: Secret
data:
  rafaykey: cmFmYXlrZXkK
  rafaysecret: cmFmYXlzZWNyZXQK
  token: dG9rZW4K