Nomad Scaleway Target

Nomad Scaleway Target is a Nomad target plugin for the Scaleway cloud platform. It enables horizontal cluster scaling by creating and destroying server instances.

Requirements

• Nomad autoscaler (tested on v0.3.7)
• Scaleway account with credentials

Documentation

Plugin Configuration

The plugin requires a couple of fields to be set in order to function. Below is an example of a minimal working configuration.

target "scaleway" {
    driver = "scaleway"

    config = {
        access_token    = "<access-token>"
        secret_token    = "<secret-token>"
        organization_id = "<org-id>"
        project_id      = "<project-id>"
        region          = "nl-ams"
        zone            = "nl-ams-1"
    }
}

• access_token (string: "") - A Scaleway API access token.
• secret_token (string: "") - A Scaleway API secret token.
• organization_id (string: "") - The Scaleway organization identifier.
• project_id (string: "") - The Scaleway project identifier region.
• zone (string: "") - THe Scaleway zone.

Alternatively, these fields can be specified via environment variables. See the Scaleway CLI documentation for more.

Policy Configuration

check "allocated-cpu" {
    # ...
    target "scaleway" {
        image               = "0d1cf4a3-aae9-4294-9fd9-fefffb297615"
        commercial_type     = "DEV1-S"
        zone                = "nl-ams-1"
    }
}

• name (string: "") - The server instance name.

• tags (string: "") - A list of comma-separated tags. The tags configured here are appended to a base list of ["nomad", "client", "autoscaler"]. Only servers with the autoscaler tag will be managed by the autoscaler.

• zone (string: "") - The Scaleway datacenter zone.

• dynamic_ip (string: "false) - A boolean in string format. If set to "true", sets a dynamic IP after instance creation.

• commercial_type (string: "") - A Scaleway server instance commercial type. Refer to the Scaleway Pricing page for a list of available types.

• image (string: "") - The Scaleway image ID.

• enable_ipv6 (string: "false") - A boolean in string format. If set to "true", sets an IPv6 IP address after instance creation.

• routed_ip (string: "false") - A boolean in string format. If set to "true", enables routed IP mode for this instance.

• security_group (string: "") - The Scaleawy server instance security group ID.

• placement_group (string: "") - The Scaleway server instance placement group ID.

• node_class (string: "") - The Nomad client node class identifier used to group nodes into a pool of resource. Conflicts with datacenter.

• node_drain_deadline (duration: "15m") The Nomad drain deadline to use when performing node draining actions. Note that the default value for this setting differs from Nomad's default of 1h.

• node_drain_ignore_system_jobs (string: "false") A boolean flag used to control if system jobs should be stopped when performing node draining actions.

• node_purge (string: "false") A boolean flag to determine whether Nomad clients should be purged when performing scale in actions.

• node_selector_strategy (string: "least_busy") The strategy to use when selecting nodes for termination. Refer to the node selector strategy documentation for more information.