Edge Delta Google Cloud Storage Output

Archive using a Google Cloud Storage destination.

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Overview

The GCS Output archives items in a Google Cloud Storage destination. These items are raw archive bytes that are buffered with the archive buffer processor.

Configuring GCS

Before you can create an output, you must have a Google Cloud Storage HMAC access key for a service account that contains the Storage Admin HMAC role.

Step 1: Create a Service Account

  1. In the Google Cloud Console, expand the navigation pane.
  2. Hover over IAM & Admin, and then click Service Accounts.
  3. Click Create Service Account.
  4. Under Service account details, complete the empty fields, and then click Create and Continue. Copy the name for this service account. You will need this information for a later step.
  5. Under Grant this service account access to project, in the drop-down menu, use the search filter to locate and select Storage HMAC Key Admin, then click Continue.
  6. Click Done.

Step 2: Create a GCS HMAC Key

  1. In the Google Cloud Console, expand the navigation pane.
  2. Under Storage, locate and hover over Cloud Storage, and then click Settings.
  3. Under Settings, click Interoperability.
  4. Click Create a Key for a Service Account.
  5. Select the newly created service account, and click Create Key.
  6. Copy and store the Access Key and Secret key, and then click Close.
  7. On the navigation pane, click Buckets.
  8. Locate and select the desired bucket.
  9. Click Permissions.
  10. In the table that appears, click Grant Access.
  11. In the window that appears, under Add principals, enter the name of the newly created service account.
  12. In Select role, use the search filter to locate and select Storage Admin.
  13. Click Save.

See this document from Google on managing HMAC keys.

Step 3: Configure the Edge Delta Agent

Next, you configure the Edge Delta agent.

Example Configuration

nodes:
  - name: my_gcs
    type: gcs_output
    bucket: <REDACTED>
    hmac_access_key: <REDACTED>
    hmac_secret: <REDACTED>
    compression: zstd
    encoding: parquet
    use_native_compression: true
    path_prefix:
      order:
      - Year
      - Month
      - Day
      - Hour
      - 2 Minute
      - tag
      - host
      format: ver=parquet/year=%s/month=%s/day=%s/hour=%s/min=%s/tag=%s/host=%s/

Required Parameters

name

A descriptive name for the node. This is the name that will appear in Visual Pipelines and you can reference this node in the yaml using the name. It must be unique across all nodes. It is a yaml list element so it begins with a - and a space followed by the string. It is a required parameter for all nodes.

nodes:
  - name: <node name>
    type: <node type>

type: gcs_output

The type parameter specifies the type of node being configured. It is specified as a string from a closed list of node types. It is a required parameter.

nodes:
  - name: <node name>
    type: <node type>

bucket

The bucket parameter defines the target bucket to use. It is specified as a string and is required.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>

hmac_access_key

The hmac_access_key parameter is the GCS HMAC access key that has permissions to upload files to the bucket. It is used with hmac_secret. It is specified as a string and is required.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    hmac_access_key: <access key>
    hmac_secret: <key secret>

hmac_secret

The hmac_secret parameter is the GCS HMAC secret associated with the access key. It is used with hmac_access_key. It is specified as a string and is required.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    hmac_access_key: <access key>
    hmac_secret: <key secret>

Optional Parameters

archiver_enabled

The archiver_enabled parameter configures whether archiver agents will be used for sending archive bytes. It is specified as a Boolean with the default of false and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    archiver_enabled: true

buffer_max_bytesize

The buffer_max_bytesize parameter configures the maximum byte size for total unsuccessful items. If the limit is reached, the remaining items are discarded until the buffer space becomes available. It is specified as a datasize.Size, has a default of 0 indicating no size limit, and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    buffer_max_bytesize: 2048

buffer_path

The buffer_path parameter configures the path to store unsuccessful items. Unsuccessful items are stored there to be retried back (exactly once delivery). It is specified as a string and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    buffer_path: <path to unsuccessful items folder>

buffer_ttl

The buffer_ttl parameter configures the time-to-Live for unsuccessful items, which indicates when to discard them. It is specified as a duration, has a default of 10m, and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    buffer_ttl: 20m

compression

The compression parameter specifies the compression format. It can be gzip, zstd, snappy or uncompressed. It is specified as a string, has a default of gzip, and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    compression: gzip | zstd | snappy | uncompressed

encoding

The encoding parameter specifies the encoding format. It can be json or parquet. It is specified as a string, has a default of json, and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    encoding: json | parquet

path_prefix

The path_prefix parameter configures the path prefix using order and format child parameters. It is optional.

The order child parameter lists the formatting items that will define the path prefix:

  • You can refer to Year, Month, Day, <any number that can divide 60> Minute, Hour, tag, host, OtherTags.<item related tags> and LogFields.<log related tags>.
  • For ECS, ecs_cluster, ecs_container_name, ecs_task_family and ecs_task_version are available.
  • For K8s, k8s_namespace, k8s_controller_kind, k8s_controller_logical_name, k8s_pod_name, k8s_container_name and k8s_container_image are available.
  • For Docker, docker_container_name and docker_image_name are available

The format child parameter specifies a format string that has %s as placeholders per each order item.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    path_prefix:
      order:
      - Year
      - Month
      - Day
      - Hour
      - 2 Minute
      - tag
      - host
    format: ver=parquet/year=%s/month=%s/day=%s/hour=%s/min=%s/tag=%s/host=%s/

use_native_compression

The use_native_compression parameter configures whether, for parquet encoding, to only compress data segments for each archive file, not the whole file. It is specified as a Boolean, has a default of false, and it is optional.

nodes:
  - name: <node name>
    type: gcs_output
    bucket: <target bucket>
    use_native_compression: true