Loki (Grafana)¶

By enabling this toolset, HolmesGPT will fetch node and pods logs from Loki by proxying through a Grafana instance.

You should enable this toolset to replace the default kubernetes/logs toolset if all your kubernetes/pod logs are consolidated inside Loki. It will make it easier for HolmesGPT to fetch incident logs, including the ability to precisely consult past logs.

HolmesGPT provides several out-of-the-box alternatives for log access. You can select from these options:

• kubernetes/logs: Access logs with kubectl logs commands. This is the default toolset.

• coralogix/logs: Access logs through Coralogix.

• grafana/loki: Access Loki logs by proxying through a Grafana instance.

Prerequisites¶

A Grafana service account token with the following permissions:

• Basic role -> Viewer

• Data sources -> Reader

Check out this video on creating a Grafana service account token.

Getting Grafana URL¶

You can find the Grafana URL required for Loki in your Grafana cloud account settings.

Obtaining the datasource UID¶

You may have multiple Loki data sources setup in Grafana. HolmesGPT uses a single Loki datasource to fetch the logs and it needs to know the UID of this datasource.

A simple way to get the datasource UID is to access the Grafana API by running the following request:

# port forward if you are using Robusta's grafana from your kubernetes cluster
kubectl port-forward svc/robusta-grafana 3000:80

# List the loki data sources
curl -s -u <username>:<password> http://localhost:3000/api/datasources | jq '.[] | select(.type == "loki")'
{
    "id": 2,
    "uid": "klja8hsa-8a9c-4b35-1230-7baab22b02ee",
    "orgId": 1,
    "name": "Loki-kubernetes",
    "type": "loki",
    "typeName": "Loki",
    "typeLogoUrl": "/public/app/plugins/datasource/loki/img/loki_icon.svg",
    "access": "proxy",
    "url": "http://loki.loki:3100",
    "user": "",
    "database": "",
    "basicAuth": false,
    "isDefault": false,
    "jsonData": {
        "httpHeaderName1": "admin",
        "httpHeaderName2": "X-Scope-OrgID",
        "tlsSkipVerify": true
    },
    "readOnly": false
}
# In this case, there is a single Loki datasourceUID
# with UID "klja8hsa-8a9c-4b35-1230-7baab22b02ee"

Configuration¶

holmes:
  toolsets:
    grafana/loki:
      enabled: true
      config:
        api_key: <your grafana API key>
        url: https://xxxxxxx.grafana.net # Your Grafana cloud account URL
        grafana_datasource_uid: <the UID of the loki data source in Grafana>
        labels:
          pod: "pod"
          namespace: "namespace"

    kubernetes/logs:
      enabled: false # Disable HolmesGPT's default logging mechanism

helm upgrade robusta robusta/robusta --values=generated_values.yaml --set clusterName=<YOUR_CLUSTER_NAME>

toolsets:
  grafana/loki:
    enabled: true
    config:
      api_key: <your grafana API key>
      url: https://xxxxxxx.grafana.net # Your Grafana cloud account URL
      grafana_datasource_uid: <the UID of the loki data source in Grafana>
      labels:
          pod: "pod"
          namespace: "namespace"

  kubernetes/logs:
    enabled: false # Disable HolmesGPT's default logging mechanism

Search labels

You can tweak the labels used by the toolset to identify kubernetes resources. This is only needed if your Loki logs settings for pod, and namespace differ from the defaults in the example above.

Use the following commands to list Loki's labels and determine which ones to use:

# Make Loki accessible locally
kubectl port-forward svc/loki 3100:3100

# List all labels. You may have to add the -H 'X-Scope-OrgID:<org id>' option with a valid org id
curl http://localhost:3100/loki/api/v1/labels

Disabling the default toolset

If Loki is your primary datasource for logs, it is advised to disable the default HolmesGPT logging tool by disabling the kubernetes/logs toolset. Without this. HolmesGPT may still use kubectl to fetch logs instead of Loki.

holmes:
    toolsets:
        kubernetes/logs:
            enabled: false

Capabilities¶

The table below describes the specific capabilities provided by this toolset. HolmesGPT can decide to invoke any of these capabilities when answering questions or investigating issues.