--- layout: default navsection: installguide title: Install the cloud dispatcher ... {% comment %} Copyright (C) The Arvados Authors. All rights reserved. SPDX-License-Identifier: CC-BY-SA-3.0 {% endcomment %} # "Introduction":#introduction # "Create compute node VM image":#create-image # "Update config.yml":#update-config # "Install arvados-dispatch-cloud":#install-packages # "Start the service":#start-service # "Restart the API server and controller":#restart-api # "Confirm working installation":#confirm-working h2(#introduction). Introduction The cloud dispatch service is for running containers on cloud VMs. It works with Microsoft Azure and Amazon EC2; future versions will also support Google Compute Engine. The cloud dispatch service can run on any node that can connect to the Arvados API service, the cloud provider's API, and the SSH service on cloud VMs. It is not resource-intensive, so you can run it on the API server node. h2(#create-image). Create compute node VM image Create a VM image following the steps "to set up a compute node":crunch2-slurm/install-compute-node.html h2(#update-config). Update config.yml h3. Create a private key Generate an SSH private key with no passphrase. Save it in the cluster configuration file (see @PrivateKey@ in the example below).
~$ ssh-keygen -N '' -f ~/.ssh/id_dispatcher
Generating public/private rsa key pair.
Your identification has been saved in /home/user/.ssh/id_dispatcher.
Your public key has been saved in /home/user/.ssh/id_dispatcher.pub.
The key fingerprint is:
[...]
~$ cat ~/.ssh/id_dispatcher
-----BEGIN RSA PRIVATE KEY-----
MIIEpQIBAAKCAQEAqXoCzcOBkFQ7w4dvXf9B++1ctgZRqEbgRYL3SstuMV4oawks
ttUuxJycDdsPmeYcHsKo8vsEZpN6iYsX6ZZzhkO5nEayUTU8sBjmg1ZCTo4QqKXr
...
oFyAjVoexx0RBcH6BveTfQtJKbktP1qBO4mXo2dP0cacuZEtlAqW9Eb06Pvaw/D9
foktmqOY8MyctzFgXBpGTxPliGjqo8OkrOyQP2g+FL7v+Km31Xs61P8=
-----END RSA PRIVATE KEY-----
You can delete the key files after you have copied the private key to your configuration file.
~$ rm ~/.ssh/id_dispatcher ~/.ssh/id_dispatcher.pub
h3. Configure CloudVMs Add or update the following portions of your cluster configuration file, @/etc/arvados/config.yml@. Refer to "config.defaults.yml":{{site.baseurl}}/admin/config.html for information about additional configuration options.
    Services:
      DispatchCloud:
        InternalURLs:
          "http://localhost:9006": {}
    Containers:
      CloudVMs:
        # BootProbeCommand is a shell command that succeeds when an instance is ready for service
        BootProbeCommand: "sudo systemctl status docker"

        # --- driver-specific configuration goes here --- see Amazon and Azure examples below ---

      DispatchPrivateKey: |
        -----BEGIN RSA PRIVATE KEY-----
        MIIEpQIBAAKCAQEAqXoCzcOBkFQ7w4dvXf9B++1ctgZRqEbgRYL3SstuMV4oawks
        ttUuxJycDdsPmeYcHsKo8vsEZpN6iYsX6ZZzhkO5nEayUTU8sBjmg1ZCTo4QqKXr
        FJ+amZ7oYMDof6QEdwl6KNDfIddL+NfBCLQTVInOAaNss7GRrxLTuTV7HcRaIUUI
        jYg0Ibg8ZZTzQxCvFXXnjseTgmOcTv7CuuGdt91OVdoq8czG/w8TwOhymEb7mQlt
        lXuucwQvYgfoUgcnTgpJr7j+hafp75g2wlPozp8gJ6WQ2yBWcfqL2aw7m7Ll88Nd
        [...]
        oFyAjVoexx0RBcH6BveTfQtJKbktP1qBO4mXo2dP0cacuZEtlAqW9Eb06Pvaw/D9
        foktmqOY8MyctzFgXBpGTxPliGjqo8OkrOyQP2g+FL7v+Km31Xs61P8=
        -----END RSA PRIVATE KEY-----
    InstanceTypes:
      x1md:
        ProviderType: x1.medium
        VCPUs: 8
        RAM: 64GiB
        IncludedScratch: 64GB
        Price: 0.62
      x1lg:
        ProviderType: x1.large
        VCPUs: 16
        RAM: 128GiB
        IncludedScratch: 128GB
        Price: 1.23
Minimal configuration example for Amazon EC2:
    Containers:
      CloudVMs:
        ImageID: ami-01234567890abcdef
        Driver: ec2
        DriverParameters:
          AccessKeyID: EALMF21BJC7MKNF9FVVR
          SecretAccessKey: yKJAPmoCQOMtYWzEUQ1tKTyrocTcbH60CRvGP3pM
          SecurityGroupIDs:
          - sg-0123abcd
          SubnetID: subnet-0123abcd
          Region: us-east-1
          EBSVolumeType: gp2
          AdminUsername: debian
Minimal configuration example for Azure:
    Containers:
      CloudVMs:
        ImageID: "https://zzzzzzzz.blob.core.windows.net/system/Microsoft.Compute/Images/images/zzzzz-compute-osDisk.55555555-5555-5555-5555-555555555555.vhd"
        Driver: azure
        DriverParameters:
          SubscriptionID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
          ClientID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
          ClientSecret: 2WyXt0XFbEtutnf2hp528t6Wk9S5bOHWkRaaWwavKQo=
          TenantID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
          CloudEnvironment: AzurePublicCloud
          ResourceGroup: zzzzz
          Location: centralus
          Network: zzzzz
          Subnet: zzzzz-subnet-private
          StorageAccount: example
          BlobContainer: vhds
          DeleteDanglingResourcesAfter: 20s
          AdminUsername: arvados
h3. Test your configuration Run the @cloudtest@ tool to verify that your configuration works. This creates a new cloud VM, confirms that it boots correctly and accepts your configured SSH private key, and shuts it down.
~$ arvados-server cloudtest && echo "OK!"
Refer to the "cloudtest tool documentation":../admin/cloudtest.html for more information. {% assign arvados_component = 'arvados-dispatch-cloud' %} {% include 'install_packages' %} {% include 'start_service' %} {% include 'restart_api' %} h2(#confirm-working). Confirm working installation On the dispatch node, start monitoring the arvados-dispatch-cloud logs:
~$ sudo journalctl -o cat -fu arvados-dispatch-cloud.service
"Make sure to install the arvados/jobs image.":install-jobs-image.html Submit a simple container request:
shell:~$ arv container_request create --container-request '{
  "name":            "test",
  "state":           "Committed",
  "priority":        1,
  "container_image": "arvados/jobs:latest",
  "command":         ["echo", "Hello, Crunch!"],
  "output_path":     "/out",
  "mounts": {
    "/out": {
      "kind":        "tmp",
      "capacity":    1000
    }
  },
  "runtime_constraints": {
    "vcpus": 1,
    "ram": 1048576
  }
}'
This command should return a record with a @container_uuid@ field. Once @arvados-dispatch-cloud@ polls the API server for new containers to run, you should see it dispatch that same container. The @arvados-dispatch-cloud@ API a list of queued and running jobs. For example:
~$ curl ...
When the container finishes, the dispatcher will log it. After the container finishes, you can get the container record by UUID *from a shell server* to see its results:
shell:~$ arv get zzzzz-dz642-hdp2vpu9nq14tx0
{
 ...
 "exit_code":0,
 "log":"a01df2f7e5bc1c2ad59c60a837e90dc6+166",
 "output":"d41d8cd98f00b204e9800998ecf8427e+0",
 "state":"Complete",
 ...
}
You can use standard Keep tools to view the container's output and logs from their corresponding fields. For example, to see the logs from the collection referenced in the @log@ field:
~$ arv keep ls a01df2f7e5bc1c2ad59c60a837e90dc6+166
./crunch-run.txt
./stderr.txt
./stdout.txt
~$ arv-get a01df2f7e5bc1c2ad59c60a837e90dc6+166/stdout.txt
2016-08-05T13:53:06.201011Z Hello, Crunch!
If the container does not dispatch successfully, refer to the @arvados-dispatch-cloud@ logs for information about why it failed.