»Nomad

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Builders

Nomad is a simple, flexible scheduler and workload orchestrator. Nomad uses Docker images for building, which are generated by these builders:

Nomad Client

A Nomad API client is used for deploying to the Nomad platform with each of the Nomad plugins. This client uses environment variables to connect to a Nomad cluster. These can be configured with runner config.

Note: This is not an all-inclusive list. Please refer to the GoLang Nomad API client documentation.

nomad (platform)

Deploy to a nomad cluster as a service using docker.

Interface

Examples

deploy {
        use "nomad" {
          region = "global"
          datacenter = "dc1"
          auth {
            username = "username"
            password = "password"
          }
          static_environment = {
            "environment": "production",
            "LOG_LEVEL": "debug"
          }
          service_port = 3000
          replicas = 1
        }
}

Required Parameters

These parameters are used in the use stanza for this plugin.

auth

The credentials for docker registry.

Type: nomad.AuthConfig

consul_token

The Consul ACL token used to register services with the Nomad job.

Uses the runner config environment variable CONSUL_HTTP_TOKEN.

Environment Variable: CONSUL_HTTP_TOKEN

vault_token

The Vault token used to deploy the Nomad job with a token having specific Vault policies attached.

Uses the runner config environment variable VAULT_TOKEN.

Environment Variable: VAULT_TOKEN

Optional Parameters

These parameters are used in the use stanza for this plugin.

datacenter

The Nomad datacenter to deploy the job to.

Type: string
Optional
Default: dc1

namespace

The Nomad namespace to deploy the job to.

Type: string
Optional

region

The Nomad region to deploy the job to.

Type: string
Optional
Default: global

replicas

The replica count for the job.

Type: int
Optional
Default: 1

resources (category)

The amount of resources to allocate to the deployed allocation.

resources.cpu

Amount of CPU in MHz to allocate to this task.

Type: int
Optional
Default: 100

resources.memorymb

Amount of memory in MB to allocate to this task.

Type: int
Optional
Default: 300

service_port

TCP port the job is listening on.

Type: uint
Optional

service_provider

Specifies the service registration provider to use for registering a service for the job.

Type: string
Optional
Default: consul

static_environment

Environment variables to add to the job.

Type: map of string to string
Optional

Output Attributes

Output attributes can be used in your waypoint.hcl as variables via artifact or deploy.

id

Type: string

name

Type: string

resource_state

Type: opaqueany.Any

nomad-jobspec (platform)

Deploy to a Nomad cluster from a pre-existing Nomad job specification file.

This plugin lets you use any pre-existing Nomad job specification file to deploy to Nomad. This deployment is able to support all the features of Waypoint. You may use Waypoint's templating features to template the Nomad jobspec with information such as the artifact from a previous build step, entrypoint environment variables, etc.

Artifact Access

You may use Waypoint's templating features to access information such as the artifact from the build or push stages. An example below shows this by using templatefile mixed with variables such as artifact.image to dynamically configure the Docker image within the Nomad job specification.

Note: If using Nomad interpolation in your jobspec file, and the templatefile function in your waypoint.hcl file, any interpolated values must be escaped with a second $. For example: $${meta.metadata} instead of ${meta.metadata}.

Entrypoint Functionality

Waypoint entrypoint functionality such as logs, exec, app configuration, and more require two properties to be true:

The running image must already have the Waypoint entrypoint installed and configured as the entrypoint. This should happen in the build stage.
Proper environment variables must be set so the entrypoint knows how to communicate to the Waypoint server. This step happens in this deployment stage.

Step 2 does not happen automatically. You must manually set the entrypoint environment variables using the templating feature. One of the examples below shows the entrypoint environment variables being injected.

Note: The Waypoint entrypoint and the Nomad entrypoint functionality cannot be used simultaneously. In order to use the features of the Waypoint entrypoint, the Nomad entrypoint must not be used in your jobspec.

URL Service

If you want your workload to be accessible by the Waypoint URL service, you must set the PORT environment variable within your job and be using the Waypoint entrypoint (documented in the previous section).

The PORT environment variable should be the port that your web service is listening on that the URL service will connect to. See one of the examples below for more details.

Interface

Examples

// The waypoint.hcl file
deploy {
  use "nomad-jobspec" {
    // Templated to perhaps bring in the artifact from a previous
    // build/registry, entrypoint env vars, etc.
    jobspec = templatefile("${path.app}/app.nomad.tpl")
  }
}

// The app.nomad.tpl file
job "web" {
  datacenters = ["dc1"]

  group "app" {
    task "app" {
      driver = "docker"

      config {
        image = "${artifact.image}:${artifact.tag}"
      }

      env {
        %{ for k,v in entrypoint.env ~}
        ${k} = "${v}"
        %{ endfor ~}

        // Ensure we set PORT for the URL service. This is only necessary
        // if we want the URL service to function.
        PORT = 3000
      }
    }
  }
}

Required Parameters

These parameters are used in the use stanza for this plugin.

consul_token

The Consul ACL token used to register services with the Nomad job.

Uses the runner config environment variable CONSUL_HTTP_TOKEN.

Environment Variable: CONSUL_HTTP_TOKEN

jobspec

Path to a Nomad job specification file.

Type: string

vault_token

The Vault token used to deploy the Nomad job with a token having specific Vault policies attached.

Uses the runner config environment variable VAULT_TOKEN.

Environment Variable: VAULT_TOKEN

Optional Parameters

These parameters are used in the use stanza for this plugin.

hcl1

Parses jobspec as HCL1 instead of HCL2.

Type: bool
Optional
Default: false

Output Attributes

Output attributes can be used in your waypoint.hcl as variables via artifact or deploy.

id

Type: string

name

Type: string

resource_state

Type: opaqueany.Any

nomad-jobspec-canary (releasemanager)

Promotes a Nomad canary deployment initiated by a Nomad jobspec deployment.

If your Nomad deployment is configured to use canaries, this releaser plugin lets you promote (or fail) the canary deployment. You may also target specific task groups within your job for promotion, if you have multiple task groups in your canary deployment.

Note: Using the -prune=false flag is recommended for this releaser. By default, Waypoint prunes and destroys all unreleased deployments and keeps only one previous deployment. Therefore, if -prune=false is not set, Waypoint may delete your job via "pruning" a previous version. See deployment pruning for more information.

Release URL

If you want the URL of the release of your deployment to be published in Waypoint, you must set the meta 'waypoint.hashicorp.com/release_url' in your jobspec. The value specified in this meta field will be published as the release URL for your application. In the future, this may source from Consul.

Interface

Examples

// The waypoint.hcl file
release {
  use "nomad-jobspec-canary" {
    groups = [
      "app"
    ]
  }
}

// The app.nomad.tpl file
job "web" {
  datacenters = ["dc1"]

  group "app" {
    network {
      mode = "bridge"
      port "http" {
        to = 80
      }
    }

    // Setting a canary in the update stanza indicates a canary deployment
    update {
      max_parallel = 1
      canary       = 1
      auto_revert  = true
      auto_promote = false
      health_check = "task_states"
    }

    service {
      name = "app"
      port = 80
      connect {
        sidecar_service {}
      }
    }

    task "app" {
      driver = "docker"
      config {
        image = "${artifact.image}:${artifact.tag}"
        ports  = ["http"]
      }

      env {
        %{ for k,v in entrypoint.env ~}
        ${k} = "${v}"
        %{ endfor ~}

        // Ensure we set PORT for the URL service. This is only necessary
        // if we want the URL service to function.
        PORT = 80
      }
    }
  }

  group "app-gateway" {
    network {
      mode = "bridge"
      port "inbound" {
        static = 8080
        to     = 8080
      }
    }

    service {
      name = "gateway"
      port = "8080"

      connect {
        gateway {
          proxy {}

          ingress {
            listener {
              port = 8080
              protocol = "http"
              service {
                name  = "app"
                hosts = [ "*" ]
              }
            }
          }
        }
      }
    }
  }
  meta = {
    // Ensure we set meta for Waypoint to detect the release URL
    "waypoint.hashicorp.com/release_url" = "http://app.ingress.dc1.consul:8080"
  }
}

Required Parameters

This plugin has no required parameters.

Optional Parameters

These parameters are used in the use stanza for this plugin.

fail_deployment

If true, marks the deployment as failed.

Type: bool
Optional

groups

List of task group names which are to be promoted.

Type: list of string
Optional

nomad (task)

Launch a Nomad job for on-demand tasks from the Waypoint server.

This will use the standard Nomad environment used for with the server install to launch on demand Nomad jobs for Waypoint server tasks.

Interface

Examples

task {
    use "nomad" {}
}

Required Parameters

This plugin has no required parameters.

Optional Parameters

These parameters are used in the use stanza for this plugin.

datacenter

The Nomad datacenter to deploy the on-demand runner task to.

Type: string
Optional
Default: dc1

namespace

The Nomad namespace to deploy the on-demand runner task to.

Type: string
Optional
Default: default

nomad_host

Hostname of the Nomad server to use for launching on-demand tasks.

Type: string
Optional
Default: http://localhost:4646

region

The Nomad region to deploy the on-demand runner task to.

Type: string
Optional
Default: global

resources_cpu

Amount of CPU in MHz to allocate to this task. This can be overriden with the '-nomad-runner-cpu' flag on server install.

Type: int
Optional
Default: 200

resources_memory

Amount of memory in MB to allocate to this task. This can be overriden with the '-nomad-runner-memory' flag on server install.

Type: int
Optional
Default: 2000

Output Attributes

Output attributes can be used in your waypoint.hcl as variables via artifact or deploy.

id

Type: string