3 navsection: installguide
4 title: Install the cloud dispatcher
8 Copyright (C) The Arvados Authors. All rights reserved.
10 SPDX-License-Identifier: CC-BY-SA-3.0
13 The cloud dispatch service is an *experimental* service for running containers on cloud VMs. It eliminates the need for SLURM, Node Manager, and SLURM dispatcher. It works with Microsoft Azure and Amazon EC2; future versions will also support Google Compute Engine.
15 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.
17 *Only one dispatch process should be running at a time.* If you are migrating a system that currently runs @crunch-dispatch-slurm@, it is safest to remove the @crunch-dispatch-slurm@ service entirely before installing @arvados-dispatch-cloud@.
20 <pre><code>~$ <span class="userinput">sudo systemctl --now disable crunch-dispatch-slurm</span>
21 ~$ <span class="userinput">sudo apt-get remove crunch-dispatch-slurm</span>
25 h2. Create a dispatcher token
27 If you haven't already done so, create an Arvados superuser token to use as SystemRootToken in your cluster config file.
29 {% include 'create_superuser_token' %}
31 h2. Create a private key
33 Generate an SSH private key with no passphrase. Save it in the cluster configuration file (see @PrivateKey@ in the example below).
36 <pre><code>~$ <span class="userinput">ssh-keygen -N '' -f ~/.ssh/id_dispatcher</span>
37 Generating public/private rsa key pair.
38 Your identification has been saved in /home/user/.ssh/id_dispatcher.
39 Your public key has been saved in /home/user/.ssh/id_dispatcher.pub.
40 The key fingerprint is:
42 ~$ <span class="userinput">cat ~/.ssh/id_dispatcher</span>
43 -----BEGIN RSA PRIVATE KEY-----
44 MIIEpQIBAAKCAQEAqXoCzcOBkFQ7w4dvXf9B++1ctgZRqEbgRYL3SstuMV4oawks
45 ttUuxJycDdsPmeYcHsKo8vsEZpN6iYsX6ZZzhkO5nEayUTU8sBjmg1ZCTo4QqKXr
47 oFyAjVoexx0RBcH6BveTfQtJKbktP1qBO4mXo2dP0cacuZEtlAqW9Eb06Pvaw/D9
48 foktmqOY8MyctzFgXBpGTxPliGjqo8OkrOyQP2g+FL7v+Km31Xs61P8=
49 -----END RSA PRIVATE KEY-----
53 You can delete the key files after you have copied the private key to your configuration file.
56 <pre><code>~$ <span class="userinput">rm ~/.ssh/id_dispatcher ~/.ssh/id_dispatcher.pub</span>
60 h2. Configure the dispatcher
62 Add or update the following portions of your cluster configuration file, @/etc/arvados/config.yml@. Refer to "config.defaults.yml":https://dev.arvados.org/projects/arvados/repository/revisions/13996-new-api-config/entry/lib/config/config.defaults.yml for information about additional configuration options.
66 <span class="userinput">uuid_prefix</span>:
67 ManagementToken: xyzzy
68 SystemRootToken: <span class="userinput">zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz</span>
70 # The key "apiserver" corresponds to ARVADOS_NODE_PROFILE in environment file (see below).
72 arvados-dispatch-cloud:
76 ExternalURL: "https://<span class="userinput">uuid_prefix.arvadosapi.com</span>"
78 # BootProbeCommand is a shell command that succeeds when an instance is ready for service
79 BootProbeCommand: "sudo systemctl status docker"
81 <b># --- driver-specific configuration goes here --- see Amazon and Azure examples below ---</b>
85 -----BEGIN RSA PRIVATE KEY-----
86 MIIEpQIBAAKCAQEAqXoCzcOBkFQ7w4dvXf9B++1ctgZRqEbgRYL3SstuMV4oawks
87 ttUuxJycDdsPmeYcHsKo8vsEZpN6iYsX6ZZzhkO5nEayUTU8sBjmg1ZCTo4QqKXr
88 FJ+amZ7oYMDof6QEdwl6KNDfIddL+NfBCLQTVInOAaNss7GRrxLTuTV7HcRaIUUI
89 jYg0Ibg8ZZTzQxCvFXXnjseTgmOcTv7CuuGdt91OVdoq8czG/w8TwOhymEb7mQlt
90 lXuucwQvYgfoUgcnTgpJr7j+hafp75g2wlPozp8gJ6WQ2yBWcfqL2aw7m7Ll88Nd
92 oFyAjVoexx0RBcH6BveTfQtJKbktP1qBO4mXo2dP0cacuZEtlAqW9Eb06Pvaw/D9
93 foktmqOY8MyctzFgXBpGTxPliGjqo8OkrOyQP2g+FL7v+Km31Xs61P8=
94 -----END RSA PRIVATE KEY-----
97 ProviderType: x1.medium
100 IncludedScratch: 64GB
103 ProviderType: x1.large
106 IncludedScratch: 128GB
111 Minimal configuration example for Amazon EC2:
115 <span class="userinput">uuid_prefix</span>:
117 ImageID: ami-01234567890abcdef
120 AccessKeyID: EALMF21BJC7MKNF9FVVR
121 SecretAccessKey: yKJAPmoCQOMtYWzEUQ1tKTyrocTcbH60CRvGP3pM
124 SubnetID: subnet-0123abcd
127 AdminUsername: debian
131 Minimal configuration example for Azure:
135 <span class="userinput">uuid_prefix</span>:
137 ImageID: "https://zzzzzzzz.blob.core.windows.net/system/Microsoft.Compute/Images/images/zzzzz-compute-osDisk.55555555-5555-5555-5555-555555555555.vhd"
140 SubscriptionID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
141 ClientID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
142 ClientSecret: 2WyXt0XFbEtutnf2hp528t6Wk9S5bOHWkRaaWwavKQo=
143 TenantID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
144 CloudEnvironment: AzurePublicCloud
148 Subnet: zzzzz-subnet-private
149 StorageAccount: example
151 DeleteDanglingResourcesAfter: 20s
152 AdminUsername: arvados
156 Create the host configuration file @/etc/arvados/environment@.
159 <pre><code>ARVADOS_NODE_PROFILE=apiserver
163 h2. Install the dispatcher
165 First, "add the appropriate package repository for your distribution":{{ site.baseurl }}/install/install-manual-prerequisites.html#repos.
167 On Red Hat-based systems:
170 <pre><code>~$ <span class="userinput">sudo yum install arvados-dispatch-cloud</span>
171 ~$ <span class="userinput">sudo systemctl enable arvados-dispatch-cloud</span>
175 On Debian-based systems:
178 <pre><code>~$ <span class="userinput">sudo apt-get install arvados-dispatch-cloud</span>
182 {% include 'notebox_begin' %}
184 The arvados-dispatch-cloud package includes configuration files for systemd. If you're using a different init system, configure a service to start and stop an @arvados-dispatch-cloud@ process as desired.
186 {% include 'notebox_end' %}
188 h2. Verify the dispatcher is running
190 Use your ManagementToken to test the dispatcher's metrics endpoint.
193 <pre><code>~$ <span class="userinput">token="xyzzy"</span>
194 ~$ <span class="userinput">curl -H "Authorization: Bearer $token" http://localhost:9006/metrics</span>
195 # HELP arvados_dispatchcloud_containers_running Number of containers reported running by cloud VMs.
196 # TYPE arvados_dispatchcloud_containers_running gauge
197 arvados_dispatchcloud_containers_running 0