# Set @DISPATCHER_SSH_PRIVKEY@ to a SSH private key that @arvados-dispatch-cloud@ will use to connect to the compute nodes:
DISPATCHER_SSH_PRIVKEY="-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABlwAAAAdzc2gtcn
...
s4VY40kNxs6MsAAAAPbHVjYXNAaW5zdGFsbGVyAQIDBA==
-----END OPENSSH PRIVATE KEY-----"
You can create one by following the steps described on the "building a compute node documentation":{{site.baseurl}}/install/crunch2-cloud/install-compute-node.html#sshkeypair page.
h3(#etchosts). Note on @/etc/hosts@
Because Arvados services are typically accessed by external clients, they are likely to have both a public IP address and a internal IP address.
On cloud providers such as AWS, sending internal traffic to a service's public IP address can incur egress costs and throttling. Thus it is very important for internal traffic to stay on the internal network. The installer implements this by updating @/etc/hosts@ on each node to associate each service's hostname with the internal IP address, so that when Arvados services communicate with one another, they always use the internal network address. This is NOT a substitute for DNS, you still need to set up DNS names for all of the services that have public IP addresses (it does, however, avoid a complex "split-horizon" DNS configuration).
It is important to be aware of this because if you mistype the IP address for any of the @*_INT_IP@ variables, hosts may unexpectedly fail to be able to communicate with one another. If this happens, check and edit as necessary the file @/etc/hosts@ on the host that is failing to make an outgoing connection.
h2(#keep). Configure Keep storage
The @multi_host/aws@ template uses S3 for storage. Arvados also supports "filesystem storage":configure-fs-storage.html and "Azure blob storage":configure-azure-blob-storage.html . Keep storage configuration can be found in in the @arvados.cluster.Volumes@ section of @local_config_dir/pillars/arvados.sls@.
h3. Object storage in S3 (AWS Specific)
If you "followed the recommendend naming scheme":#keep-bucket for both the bucket and role (or used the provided Terraform script), you're done.
If you did not follow the recommendend naming scheme for either the bucket or role, you'll need to update these parameters in @local.params@:
# Set @KEEP_AWS_S3_BUCKET@ to the value of "keepstore bucket you created earlier":#keep-bucket
# Set @KEEP_AWS_IAM_ROLE@ to "keepstore role you created earlier":#keep-bucket
You can also configure a specific AWS Region for the S3 bucket by setting @KEEP_AWS_REGION@.
{% include 'ssl_config_multi' %}
h2(#authentication). Configure your authentication provider (optional, recommended)
By default, the installer will use the "Test" provider, which is a list of usernames and cleartext passwords stored in the Arvados config file. *This is low security configuration and you are strongly advised to configure one of the other "supported authentication methods":setup-login.html* .
h2(#ext-database). Using an external database (optional)
The standard behavior of the installer is to install and configure PostgreSQL for use by Arvados. You can optionally configure it to use a separately managed database instead.
Arvados requires a database that is compatible with PostgreSQL 9.5 or later. For example, Arvados is known to work with Amazon Aurora (note: even idle, Arvados services will periodically poll the database, so we strongly advise using "provisioned" mode).
# In @local.params@, remove 'database' from the list of roles assigned to the controller node:
NODES=(
[controller.${DOMAIN}]=controller,websocket,dispatcher,keepbalance
...
)
# In @local.params@, set @DATABASE_INT_IP@ to empty string and @DATABASE_EXTERNAL_SERVICE_HOST_OR_IP@ to the database endpoint (can be a hostname, does not have to be an IP address).
DATABASE_INT_IP=""
...
DATABASE_EXTERNAL_SERVICE_HOST_OR_IP="arvados.xxxxxxx.eu-east-1.rds.amazonaws.com"
# In @local.params.secrets@, set @DATABASE_PASSWORD@ to the correct value. "See the previous section describing correct quoting":#localparams
# In @local.params@ you may need to adjust the database name and user.
h2(#further_customization). Further customization of the installation (optional)
If you are installing on AWS and have followed all of the naming conventions recommend in this guide, you probably don't need to do any further customization.
If you are installing on a different cloud provider or on HPC, other changes may require editing the Saltstack pillars and states files found in @local_config_dir@. In particular, @local_config_dir/pillars/arvados.sls@ contains the template (in the @arvados.cluster@ section) used to produce the Arvados configuration file that is distributed to all the nodes. Consult the "Configuration reference":config.html for a comprehensive list of configuration keys.
Any extra Salt "state" files you add under @local_config_dir/states@ will be added to the Salt run and applied to the hosts.
h2(#create_a_compute_image). Configure compute nodes
{% include 'branchname' %}
If you will use fixed compute nodes with an HPC scheduler such as SLURM or LSF, you will need to "Set up your compute nodes with Docker":{{site.baseurl}}/install/crunch2/install-compute-node-docker.html or "Set up your compute nodes with Singularity":{{site.baseurl}}/install/crunch2/install-compute-node-singularity.html.
On cloud installations, containers are dispatched in Docker daemons running in the _compute instances_, which need some additional setup.
h3. Build the compute image
Follow "the instructions to build a cloud compute node image":{{site.baseurl}}/install/crunch2-cloud/install-compute-node.html using the compute image builder script found in @arvados/tools/compute-images@ in your Arvados clone from "step 3":#download.
h3. Configure the compute image
Once the image has been created, open @local.params@ and edit as follows (AWS specific settings described here, you will need to make custom changes for other cloud providers):
# Set @COMPUTE_AMI@ to the AMI produced by Packer
# Set @COMPUTE_AWS_REGION@ to the appropriate AWS region
# Set @COMPUTE_USER@ to the admin user account on the image
# Set the @COMPUTE_SG@ list to the VPC security group which you set up to allow SSH connections to these nodes
# Set @COMPUTE_SUBNET@ to the value of SubnetId of your VPC
# Update @arvados.cluster.InstanceTypes@ in @local_config_dir/pillars/arvados.sls@ as necessary. The example instance types are for AWS, other cloud providers will of course have different instance types with different names and specifications.
(AWS specific) If m5/c5 node types are not available, replace them with m4/c4. You'll need to double check the values for Price and IncludedScratch/AddedScratch for each type that is changed.
h2(#installation). Begin installation
At this point, you are ready to run the installer script in deploy mode that will conduct all of the Arvados installation.
Run this in the @~/arvados-setup-xarv1@ directory:
./installer.sh deploy
This will install and configure Arvados on all the nodes. It will take a while and produce a lot of logging. If it runs into an error, it will stop.
h2(#test-install). Confirm the cluster is working
When everything has finished, you can run the diagnostics.
Depending on where you are running the installer, you need to provide @-internal-client@ or @-external-client@.
If you are running the diagnostics from one of the Arvados machines inside the private network, you want @-internal-client@ .
You are an "external client" if you running the diagnostics from your workstation outside of the private network.
./installer.sh diagnostics (-internal-client|-external-client)
h3(#debugging). Debugging issues
The installer records log files for each deployment.
Most service logs go to @/var/log/syslog@.
The logs for Rails API server can be found in @/var/www/arvados-api/current/log/production.log@ on the appropriate instance(s).
Workbench 2 is a client-side Javascript application. If you are having trouble loading Workbench 2, check the browser's developer console (this can be found in "Tools → Developer Tools").
h3(#iterating). Iterating on config changes
You can iterate on the config and maintain the cluster by making changes to @local.params@ and @local_config_dir@ and running @installer.sh deploy@ again.
If you are debugging a configuration issue on a specific node, you can speed up the cycle a bit by deploying just one node:
./installer.sh deploy keep0.xarv1.example.com
However, once you have a final configuration, you should run a full deploy to ensure that the configuration has been synchronized on all the nodes.
h3(#common-problems). Common problems and solutions
h4. PG::UndefinedTable: ERROR: relation \"api_clients\" does not exist
The arvados-api-server package sets up the database as a post-install script. If the database host or password wasn't set correctly (or quoted correctly) at the time that package is installed, it won't be able to set up the database.
This will manifest as an error like this:
#
If this happens, you need to
1. correct the database information
2. run @./installer.sh deploy xarv1.example.com@ to update the configuration on the API/controller node
3. Log in to the API/controller server node, then run this command to re-run the post-install script, which will set up the database:
dpkg-reconfigure arvados-api-server
4. Re-run @./installer.sh deploy@ again to synchronize everything, and so that the install steps that need to contact the API server are run successfully.
h4. Missing ENA support (AWS Specific)
If the AMI wasn't built with ENA (extended networking) support and the instance type requires it, it'll fail to start. You'll see an error in syslog on the node that runs @arvados-dispatch-cloud@. The solution is to build a new AMI with --aws-ena-support true
h2(#initial_user). Initial user and login
At this point you should be able to log into the Arvados cluster. The initial URL will be
@https://workbench.${DOMAIN}@
If you did *not* "configure a different authentication provider":#authentication you will be using the "Test" provider, and the provision script creates an initial user for testing purposes. This user is configured as administrator of the newly created cluster. It uses the values of @INITIAL_USER@ and @INITIAL_USER_PASSWORD@ from the @local.params*@ file.
If you *did* configure a different authentication provider, the first user to log in will automatically be given Arvados admin privileges.
h2(#monitoring). Monitoring and Metrics
You can monitor the health and performance of the system using the admin dashboard:
@https://grafana.${DOMAIN}@
To log in, use username "admin" and @${INITIAL_USER_PASSWORD}@ from @local.params.secrets@.
Once logged in, you will want to add the dashboards to the front page.
# On the left icon bar, click on "Browse"
# You should see a folder called "Arvados Cluster", click to open it
## If you don't see anything, make sure the check box next to "Starred" is not selected
# You should see three dashboards "Arvados cluster overview", "Node exporter" and "Postgres exporter"
# Visit each dashboard, at the top of the page click on the star next to the title to "Mark as favorite"
# They should now be linked on the front page.
h2(#load_balancing). Load balancing controllers (optional)
In order to handle high loads and perform rolling upgrades, the controller service can be scaled to a number of hosts and the installer make this implementation a fairly simple task.
First, you should take care of the infrastructure deployment: if you use our Terraform code, you will need to set up the @terraform.tfvars@ in @terraform/vpc/@ so that in addition to the node named @controller@ (the load-balancer), a number of @controllerN@ nodes (backends) are defined as needed, and added to the @internal_service_hosts@ list.
We suggest that the backend nodes just hold the controller service and nothing else, so they can be easily created or destroyed as needed without other service disruption.
The following is an example @terraform/vpc/terraform.tfvars@ file that describes a cluster with a load-balancer, 2 backend nodes, a separate database node, a shell node, a keepstore node and a workbench node that will also hold other miscelaneous services:
region_name = "us-east-1"
cluster_name = "xarv1"
domain_name = "xarv1.example.com"
# Include controller nodes in this list so instances are assigned to the
# private subnet. Only the balancer node should be connecting to them.
internal_service_hosts = [ "keep0", "shell", "database", "controller1", "controller2" ]
# Assign private IPs for the controller nodes. These will be used to create
# internal DNS resolutions that will get used by the balancer and database nodes.
private_ip = {
controller = "10.1.1.11"
workbench = "10.1.1.15"
database = "10.1.2.12"
controller1 = "10.1.2.21"
controller2 = "10.1.2.22"
shell = "10.1.2.17"
keep0 = "10.1.2.13"
}
Once the infrastructure is deployed, you'll then need to define which node will be using the @balancer@ role and which will be the @controller@ nodes in @local.params@, as it's being shown in this partial example:
NODES=(
[controller.${DOMAIN}]=balancer
[controller1.${DOMAIN}]=controller
[controller2.${DOMAIN}]=controller
[database.${DOMAIN}]=database
...
)
Note that we also set the @database@ role to its own node instead of just leaving it in a shared controller node.
Each time you run @installer.sh deploy@, the system will automatically do rolling upgrades. This means it will make changes to one controller node at a time, after removing it from the balancer so that there's no downtime.
h2(#post_install). After the installation
As part of the operation of @installer.sh@, it automatically creates a @git@ repository with your configuration templates. You should retain this repository but *be aware that it contains sensitive information* (passwords and tokens used by the Arvados services as well as cloud credentials if you used Terraform to create the infrastructure).
As described in "Iterating on config changes":#iterating you may use @installer.sh deploy@ to re-run the Salt to deploy configuration changes and upgrades. However, be aware that the configuration templates created for you by @installer.sh@ are a snapshot which are not automatically kept up to date.
When deploying upgrades, consult the "Arvados upgrade notes":{{site.baseurl}}/admin/upgrading.html to see if changes need to be made to the configuration file template in @local_config_dir/pillars/arvados.sls@. To specify the version to upgrade to, set the @VERSION@ parameter in @local.params@.
See also "Maintenance and upgrading":{{site.baseurl}}/admin/maintenance-and-upgrading.html for more information.