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README.md

Reference repository generators

This directory contains the input files and scripts needed for generating:

See also: https://www.grid5000.fr/mediawiki/index.php/Reference_Repository.

General Design

For the general design discussion, see:

Requirements

Ruby 2.1 (+ HashDiff and Net/SSH for the oar-generator; + peach and ruby-cute for run-g5kchecks; + hash_validator for the input validators)

Here is an example for creating a ruby setup with RVM (https://rvm.io/), gemset and bundle: $ \curl -sSL https://get.rvm.io | bash -s stable --ruby $ source ~/.rvm/scripts/rvm $ rvm install 2.1 $ rvm gemset create ref-repo-dev $ rvm gemset use ref-repo-dev $ bundle install

Input files

Input files are stored in the input/ directory.

A ruby script loads the YAML files in a global hashtable. The file paths are used as entry points to the hashtable.

sites/nancy/clusters/pomme/pomme.yaml.erb

nodes: pomme-1: ib0: ip: 172.18.70.11

becomes:

hash = {"sites"=> {"nancy"=> {"clusters"=> {"pomme"=> {"nodes"=> {"pomme-1"=> {"ib0"=> {"ip"=> "172.18.70.11"} } } } } } } }

The input file loader (lib/input_loader.rb) also supports coalesced key names:

pomme-[1-4]: performance: core_flops: 3929000000 node_flops: 7440000000

and for more complex use case, YAML can be generated with ERB:

input/sites/nancy/clusters/pomme.yaml.erb

nodes: <% (1..16).each { |i| %> pomme-<%= i %>: ib0: ip: 172.18.70.<%= i + 10 %> <% } %>

Updating the node input files using g5k-checks

Node files (input/grid5000/sites//clusters//nodes/*.yaml) are generated by g5k-checks and should not be edited manually.

  • You can use run-g5kchecks/run-g5kchecks.rb for updating those files.
  • Node files of input/ are slightly edited compared to the raw output of g5k-checks -m api. => Use run-g5kchecks/postprocessing.rb for applying the mandatory modifications to the g5k-checks ouput.

See also:

Reference API Generator

The Reference API generator reads the input/ YAML files and generates the data/ JSON files.

Usage: cd reference-api/; ruby reference-api.rb

Updating the OAR properties

The generator can show the differences between the reference-repo and the OAR servers databases:

workstation$ ruby oar-properties.rb -d -n graphene-105 -vv

Output format: [’’, ’key’, ’old value’, ’new value’] graphene-105: ["", "disktype", "sata", "SATA II"] ["", "eth10g", nil, false] ["", "ib10g", false, true] ["", "ib10gmodel", "none", "MT26418"] ["", "ib40g", nil, false] ["~", "ib40gmodel", nil, "none"]

You can run the script per site, cluster or node using the -s, -c and -n options. There are several verbose levels (-v, -vv, -vvv). After reviewing the changes, you can update the configuration of the OAR server:

workstation$$ ruby oar-properties.rb -d -n graphene-105 -e

The previous command will execute the oarnodesetting/oar_resources_add/oarproperty commands needed for updating the OAR database via SSH. For example, it will execute: g5kadmin@oar.nancy$ oarnodesetting -h graphene-104 -p disktype='SATA II' -p eth10g='NO' -p ib10gmodel='MT26418'

If you do not want to run the script directly on the OAR server, you can also print the commands out by using the -o (--output) option in place of -e (--execute).

With the -d (--diff) option, the script fetches the OAR resources description from the OAR API. If you remove this option, the generator simply creates a script for setting up every node properties (even those that might already be set correctly). There is a safeguard for not adding a node twice to an OAR database. You can also use cache files (-d oarnodes-%s.yaml) if you do not want to retrieve the OAR configuration each time you run the generator.

See ruby oar-properties.rb --help for more information.

If you need to add new OAR properties, see get_node_properties and diff_node_properties in oar-properties/lib/lib-oar-properties.rb. This script can be tested with the oar-vagrant box (https://github.com/oar-team/oar-vagrant).

See also:

Generating the DHCP, DNS, Kadeploy, Conman and Lanpower configurations

Principles:

  • The source code and the templates of the generators are located in the reference-repo in the generators/puppet/ directory.
  • Additional configuration files (ex: console passwords, kadeploy tuning options etc.) are located within the puppet-repo in puppet-repo/modules/<module_name>/generators/.
  • By default, the output files of the generators are created at /tmp/puppet-repo. It is possible to create them directly at the right place in the puppet-repo directories by passing the option "-o puppet_repo_path" to the generator. (ie. you can use git diff to display the changes made by the generators before committing them).

Usage example:

$ (cd /tmp; git clone ssh://g5kadmin@git.grid5000.fr/srv/git/repos/puppet-repo) # or use your existing local copy of the repository $ cd reference-repo/generators/puppet $ rake puppet_repo=/tmp/puppet_repo # run every generator and output files to /tmp/puppet_repo

or

$ rake puppet_repo=/tmp/puppet_repo sites=SITE1,SITE2 # run every generator and output files to /tmp/puppet_repo for only SITE1 and SITE2

You also can also run the generators one by one:

$ ruby bindg5k.rb [options] $ ruby conmang5k.rb [options] $ ruby dhcpg5k.rb [options] $ ruby kadeployg5k.rb [options] $ ruby lanpowerg5k.rb [options]

You can run ruby %generator%.rb -h to see available options for a particular generator.

Each generator can be run to generate configuration files for only specified grid5000 sites: ruby %generator%.rb -s SITE1,SITE2 [options]

By default, generators will execute for all sites.

Configuration directory

lanpowerg5k, conmang5k and kadeployg5k generators require an additional parameter, the path where to find configuration used to generate configuration files:

ruby %generator%.rb -o puppet_repo_path -c configuration_directory

It is not mandatory to provide it if the '-o' option is given. In that case, the configuration directory will be set to 'puppet-repo-path/modules/<module_name>/generators/'.

To enable the standalone release of the generators, the conf-examples/ directory includes examples of configuration files and the generators can be run without access to the puppet-repo:

ruby %generator%.rb -c ./conf-examples/

Notes about the conmang5k/lanpowerg5k generators

  • The configuration is generated for both the clusters and servers entries of the reference-api.

Example:

sites: rennes: clusters: parapide: nodes: parapide-[1-25]: servers: ceph: nodes: ceph[0-3]:

  • The configuration is shared between the module conmang5k and lanpowerg5k ** Passwords are stored in puppet-repo/modules/conmang5k/generators/console-password.yaml ** Additional configuration options are located in puppet-repo/modules/conmang5k/generators/console-password.yaml

Notes about the kadeplog5k generator

  • It generates both the configuration of the kadeploy and kadeploy-dev servers.
  • It generates the <site_uid>/clusters.conf and the <site_uid>/<cluster_uid>-clusters.conf files for each sites.
  • The template of the <site_uid>/<cluster_uid>-clusters.conf files is located in reference-repo/generators/puppet/templates/kadeployg5k.conf.erb. It includes default parameters.
  • Cluster specific tuning options are located in puppet-repo/modules/kadeployg5k/generators/kadeployg5k.yaml and kadeployg5k-dev.yaml

Notes about the DNS and DHCP generators

  • Those generators are solely based on the data of the reference API.
  • DHCP and DNS entries are generated for nodes (including MIC accelerators), network equipments, pdus and dom0. In addition, the DNS also has kavlan entries and the DHCP includes admin laptops.
  • The DNS script generates the global-<site_uid>.conf files and the zones/<site_uid>/*.db files.
  • DNS CNAME are generated for the main ethernet interface of the nodes.
  • DNS entries can be added manually to the configuration: ** A new zone can be added directly to the ./zones/<site_uid>/ directory. Re-run the generator after adding the file to add the zone to the global-<site_uid>.conf files. ** For existing zone, add a ./zones/<site_uid>/<zone_name>-manual.db file and re-run the generator. This file will get included automatically in the generated zone file called ./zones/<site_uid>/<zone_name>.db. See bindg5k/files/zones/nancy/ for examples. <zone_name>-manual.db files do no need the usual headers ($TTL directives etc.) of zone files.

How to add a new cluster to Grid'5000

The generators can be used to ease the integration of a new cluster to the platform.

The general idea is to:

  • add manually a minimalistic description of the new cluster to the reference-api input files
  • use the generators to create the (puppet) configuration files needed to boot the cluster
  • enrich the reference-api input files with information retrieved by g5k-checks on the nodes

Detailed steps:

  • Manually get the list of node MAC adresses (ex: QR code scan)

  • Add the cluster to the reference-api:

See input/grid5000/sites/nancy/clusters/graoully/graoully_ip.yaml.erb as an example for bootstrapping a cluster configuration. Create a similar file for the new cluster. This files includes the ip/mac information that will be used by the configuration file generators.

You don't have to run the reference-api generator yet (generator/reference-api/reference-api.rb) but the cluster information must be available locally in the input directory

  • Run the DHCP, Kadeploy, Conman and Lanpower generators: $ cd generators/puppet $ puppet_repo=path_to_your_local_puppet_repo rake

  • First boot of the cluster :-)

  • Retrieve hardware information using g5k-check and add them to the reference repository $ cd generators/run-g5kchecks; ruby run-g5kchecks.rb -f -s <site_uid> -c <cluster_uid>

  • Manually add the information that are not provided by g5k-checks (ex: the main <cluster_uid>.yaml file, PDU information ...). Use graoully.yaml as an example.

Note that it is mandatory to specify some of the network_adapter properties (enabled=true, mountable: true etc.). Those properties are used to detect the name of the main interface (eth0 ? eth1 ?).

You can use the input validator to check the new cluster configuration: $ cd generators/input-validators; ruby yaml-input-schema-validator.rb

  • Run the OAR properties generators. This generator will add the nodes to the OAR configuration. $ cd generators/oar-properties/ $ ruby oar-properties.rb -s <site_uid> -c <cluster_uid> -d -vv $ ruby oar-properties.rb -s <site_uid> -c <cluster_uid> -d -e

  • Add the cluster to the reference API: $ cd generator/reference-api; ruby reference-api.rb # and then commit the data/ directory + wait 10-15 minutes

  • Boot and check the nodes with g5k-checks