Loki Streaming Output and Integration

George Alpizar
George Alpizar
  • Updated

Overview

The Loki output will stream analytics and insights to your Loki endpoint.


Review Parameters

Review the following parameters that you can configure in the Edge Delta App:

Parameter Description
name

Enter a descriptive name for the output or integration.

For outputs, this name will be used to map this destination to a workflow.

This parameter is required. 

Review the following example:

name: loki-integration
integration_name

This parameter only appears when you create an individual output.

This parameter refers to the organization-level integration created in the Integrations page. If you enter this name, then the rest of the fields will be automatically populated.

If you need to add multiple instances of the same integration into the config, then you can add a custom name to each instance via the name field. In this situation, the name should be used to refer to the specific instance of the destination in the workflows.

This parameter is optional. 

Review the following example:

integration_name: orgs-kafka
type

Enter loki.

This parameter is required. 

Review the following example:

type: loki
endpoint

Enter the Loki endpoint.

This parameter is required. 

Review the following example:

endpoint: "https://localhost:3000/loki/api/v1/push"
user

Enter the username for Loki.

This parameter is optional. 

Review the following example:

user: "user"
api_key

Enter the Loki API key.

This parameter is optional. 

Review the following example:

api_key: "api_key"
alert_as_log

Enter true to send alerts as a log. 

  • Additionally, for this parameter to work, you must also enter log as a feature type. 

Enter false to send alerts as events. 

This parameter is optional. 

Review the following example:

alert_as_log: true
custom_tags

This parameter defines key-value pairs that are streamed with every request.

This parameter supports templating.

This parameter is optional. 

Review the following example:

      custom_tags:
        "app": "test"
        "region": "us-west-2"
        "File Path": "{{.FileGlobPath}}"
        "K8s PodName": "{{.K8sPodName}}"
        "K8s Namespace": "{{.K8sNamespace}}"
        "K8s ControllerKind": "{{.K8sControllerKind}}"
        "K8s ContainerName": "{{.K8sContainerName}}"
        "K8s ContainerImage": "{{.K8sContainerImage}}"
        "K8s ControllerLogicalName": "{{.K8sControllerLogicalName}}"
        "ECSCluster": "{{.ECSCluster}}"
        "ECSContainerName": "{{.ECSContainerName}}"
        "ECSTaskVersion": "{{.ECSTaskVersion}}"
        "ECSTaskFamily": "{{.ECSTaskFamily}}"
        "DockerContainerName": "{{.DockerContainerName}}"
        "ConfigID": "{{.ConfigID}}"
        "Host": "{{.Host}}"
        "Source": "{{.Source}}"
        "SourceType": "{{.So
message_template

This parameter customizes the message content.

This parameter supports templating.

This parameter is optional. 

Review the following example:

      message_template:
        "File Path": "{{.FileGlobPath}}"
        "K8s PodName": "{{.K8sPodName}}"
        "K8s Namespace": "{{.K8sNamespace}}"
        "K8s ControllerKind": "{{.K8sControllerKind}}"
        "K8s ContainerName": "{{.K8sContainerName}}"
        "K8s ContainerImage": "{{.K8sContainerImage}}"
        "K8s ControllerLogicalName": "{{.K8sControllerLogicalName}}"
        "ECSCluster": "{{.ECSCluster}}"
        "ECSContainerName": "{{.ECSContainerName}}"
        "ECSTaskVersion": "{{.ECSTaskVersion}}"
        "ECSTaskFamily": "{{.ECSTaskFamily}}"
        "DockerContainerName": "{{.DockerContainerName}}"
        "ConfigID": "{{.ConfigID}}"
        "Host": "{{.Host}}"
        "Source": "{{.Source}}"
        "SourceType": "{{.SourceType}}"
        "Tag": "{{.Tag}}"
features

This parameter defines which data types to stream to the destination.

You can enter logedac, and / or cluster pattern.

To learn more, review the Review Feature Types section in Stream Outputs and Integrations Overview.

This parameter is optional. 

Review the following example:

features: log
buffer_ttl

Enter a length of time to retry failed streaming data.

After this length of time is reached, the failed streaming data will no longer be tried.

This parameter is optional. 

Review the following example: 

buffer_ttl: 2h
buffer_path

Enter a folder path to temporarily store failed streaming data.

The failed streaming data will be retried until the data reaches its destinations or until the Buffer TTL value is reached.

If you enter a path that does not exist, then the agent will create directories, as needed.

This parameter is optional.

Review the following example:

buffer_path: /var/log/edgedelta/pushbuffer/
buffer_max_bytesize

Enter the maximum size of failed streaming data that you want to retry.

If the failed streaming data is larger than this size, then the failed streaming data will not be retried.

This parameter is optional.

Review the following example:

buffer_max_bytesize: 100MB

As an optional step, you can customize the message payload and custom tags that are sent to a Loki destination.

  • Loki does not support the dash ( - ) character as a key value.

Review the following template fields:

Field Description
Tag This field is the user-defined tag that describes the environment, such as prod_us_west_2_cluster.
Host This field is the hostname of the environment where the agent is running on.
ConfigID This field is the configuration ID of the corresponding agent.
Source This field is the source name, specifically the identifier of the source, such as docker container id or file name.
SourceType This field is the source type, such as Docker or system.
FileGlobPath This field is the file global path.
K8sPodName This field is the Kubernetes pod name.
K8sNamespace This field is the Kubernetes namespace.
K8sControllerKind This field is the Kubernetes controller kind.
K8sContainerName This field is the Kubernetes container name.
K8sContainerImage This field is the Kubernetes container image.
K8sControllerLogicalName This field is the Kubernetes controller logical name.
ECSCluster This field is the ECS cluster name.
ECSContainerName This field is the ECS container name.
ECSTaskVersion This field is the ECS task version.
ECSTaskFamily This field is the ECS task family.
DockerContainerName This field is the Docker container name.

Review Sample Configuration 

The following sample configuration displays an output without the name of the organization-level integration:

      - name: loki-integration
        type: loki
        endpoint: "https://localhost:3000/loki/api/v1/push"
        api_key: "api_key"
        user: "user"
        custom_tags:
          "app": "test"
          "region": "us-west-2"
        message_template:
          "File Path": "{{.FileGlobPath}}"
          "K8s PodName": "{{.K8sPodName}}"
          "K8s Namespace": "{{.K8sNamespace}}"
          "K8s ControllerKind": "{{.K8sControllerKind}}"
          "K8s ContainerName": "{{.K8sContainerName}}"
          "K8s ContainerImage": "{{.K8sContainerImage}}"
          "K8s ControllerLogicalName": "{{.K8sControllerLogicalName}}"
          "ECSCluster": "{{.ECSCluster}}"
          "ECSContainerName": "{{.ECSContainerName}}"
          "ECSTaskVersion": "{{.ECSTaskVersion}}"
          "ECSTaskFamily": "{{.ECSTaskFamily}}"
          "DockerContainerName": "{{.DockerContainerName}}"
          "ConfigID": "{{.ConfigID}}"
          "Host": "{{.Host}}"
          "Source": "{{.Source}}"
          "SourceType": "{{.SourceType}}"
          "Tag": "{{.Tag}}"

 

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