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cc-docker
This is a docker-compose
setup which provides a quickly started environment for ClusterCockpit development and testing, using cc-backend
.
A number of services is readily available as docker container (nats, cc-metric-store, InfluxDB, LDAP, SLURM), or easily added by manual configuration (MariaDB).
It includes the following containers:
Service full name | docker service name | port |
---|---|---|
Slurm Controller service | slurmctld | 6818 |
Slurm Database service | slurmdbd | 6817 |
Slurm Rest service with JWT authentication | slurmrestd | 6820 |
Slurm Worker | node01 | 6818 |
MariaDB service | mariadb | 3306 |
InfluxDB serice | influxdb | 8086 |
NATS service | nats | 4222 |
cc-metric-store service | cc-metric-store | 8084 |
OpenLDAP | openldap | 389, 636 |
The setup comes with fixture data for a Job archive, cc-metric-store checkpoints, InfluxDB, MariaDB, and a LDAP user directory.
Prerequisites
For all the docker services to work correctly, you will need the following tools installed:
docker
anddocker-compose
golang
(for compiling cc-metric-store)perl
(for migrateTimestamp.pl) with Cpanel::JSON::XS, Data::Dumper, Time::Piece, Sort::Versions and File::Slurp perl modules.npm
(for cc-backend)make
(for building slurm base image)
It is also recommended to add docker service to sudouser group since the setupDev.sh script assumes sudo permissions for docker and docker-compose services.
You can use:
sudo groupadd docker
sudo usermod -aG docker $USER
# restart after adding your docker with your user to sudo group
sudo shutdown -r -t 0
Note: You can install all these dependencies via predefined installation steps in prerequisite_installation_script.sh
.
If you are using different linux flavors, you will have to adapt prerequisite_installation_script.sh
as well as setupDev.sh
.
Setup
-
Clone
cc-backend
repository in chosen base folder:$> git clone https://github.com/ClusterCockpit/cc-backend.git
-
Run
$ ./setupDev.sh
: NOTICE The script will download files of a total size of 338MB (mostly for the cc-metric-store data). -
The setup-script launches the supporting container stack in the background automatically if everything went well. Run
$> ./cc-backend/cc-backend -server -dev
to startcc-backend
. -
By default, you can access
cc-backend
in your browser athttp://localhost:8080
. You can shut down the cc-backend server by pressingCTRL-C
, remember to also shut down all containers via$> docker-compose down
afterwards. -
You can restart the containers with:
$> docker-compose up -d
.
Credentials for logging into clustercockpit
Credentials for the preconfigured demo user are:
- User:
demo
- Password:
demo
You can also login as regular user using any credential in the LDAP user directory at ./data/ldap/users.ldif
.
Post-Setup adjustment for using cc-metric-store
When using influxdb
as a metric database, one must adjust the following files:
cc-backend/var/job-archive/fritz/cluster.json
cc-backend/var/job-archive/alex/cluster.json
In the JSON (cc-backend/config.json), exchange the content of the metricDataRepository
-Entry (By default configured for cc-metric-store
) with:
"metricDataRepository":
{
"kind": "cc-metric-store",
"url": "http://localhost:8082",
"token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFZERTQSJ9.eyJ1c2VyIjoiYWRtaW4iLCJyb2xlcyI6WyJST0xFX0FETUlOIiwiUk9MRV9BTkFMWVNUIiwiUk9MRV9VU0VSIl19.d-3_3FZTsadPjDEdsWrrQ7nS0edMAR4zjl-eK7rJU3HziNBfI9PDHDIpJVHTNN5E5SlLGLFXctWyKAkwhXL-Dw"
}
Docker commands to access the services
Note: You need to be in cc-docker directory in order to execute any docker command
You can view all docker processes running on either of the VM instance by using this command:
$ docker ps
Now that you can see the docker services, and if you want to manually access the docker services, you have to run bash
command in those running services.
Example
: You want to run slurm commands likesinfo
orsqueue
orscontrol
on slurm controller, you cannot directly access it.
You need to bash
into the running service by using the following command:
$ docker exec -it <docker service name> bash
#example
$ docker exec -it slurmctld bash
#or
$ docker exec -it mariadb bash
Once you start a bash
on any docker service, then you may execute any service related commands in that bash
.
But for Cluster Cockpit development, you only need ports to access these docker services. You have to use localhost:<port>
when trying to access any docker service. You may need to configure the cc-backend/config.json
based on these docker services and ports.
Slurm setup in cc-docker
1. Slurm controller
Currently slurm controller is aware of the 1 node that we have setup in our mini cluster i.e. node01.
In order to execute slurm commands, you may need to bash
into the slurmctld
docker service.
$ docker exec -it slurmctld bash
Then you may be able to run slurm controller commands. A few examples without output are:
$ sinfo
or
$ squeue
or
$ scontrol show nodes
2. Slurm rest service
You do not need to bash
into the slurmrestd service but can directly access the rest API via localhost:6820. A simple example on how to CURL to the slurm rest API is given in the curl_slurmrestd.sh
.
You can directly use curl_slurmrestd.sh
with a never expiring JWT token ( can be found in /data/slurm/secret/jwt_token.txt )
You may also use the never expiring token directly from the file for any of your custom CURL commands.
Known Issues
docker-compose
installed on Ubuntu (18.04, 20.04) viaapt-get
can not correctly parsedocker-compose.yml
due to version differences. Install latest version ofdocker-compose
from https://docs.docker.com/compose/install/ instead.- You need to ensure that no other web server is running on ports 8080 (cc-backend), 8082 (cc-metric-store), 8086 (InfluxDB), 4222 and 8222 (Nats), or 3306 (MariaDB). If one or more ports are already in use, you have to adapt the related config accordingly.
- Existing VPN connections sometimes cause problems with docker. If
docker-compose
does not start up correctly, try disabling any active VPN connection. Refer to https://stackoverflow.com/questions/45692255/how-make-openvpn-work-with-docker for further information.
Docker services and restarting the services
You can find all the docker services in docker-compose.yml
. Feel free to modify it.
Whenever you modify it, please use
$ docker compose down
in order to shut down all the services in all the VM’s (maininstance, nodeinstance, nodeinstance2) and then start all the services by using
$ docker compose up
TODO: Update job archive and all other metric data. The job archive with 1867 jobs originates from the second half of 2020. Roughly 2700 jobs from the first week of 2021 are loaded with data from InfluxDB. Some views of ClusterCockpit (e.g. the Users view) show the last week or month. To show some data there you have to set the filter to time periods with jobs (August 2020 to January 2021).