Coding Week 4

Meeting 0

Organizer

• Gaurav Mishra

Attendees

• Omar AbdelSamea

Outcomes

• Discussed the issue of meta-agents folder, currently, the scheduler looks for meta-agents in /etc/fossology/mods-enabled inside it's pod which doesn't contain any agent.
• As hot fix, Gaurav suggested implementing to mount mods-enabled folder to a PVC.
• To continue development until a final decision is taken from the mentors, all required agents will be copied to meta-agents folder inside the scheduler pod.

Meeting 1

Organizer

• Gaurav Mishra

Attendees

• Ayush Bharadwaj
• Klaus Gmeinwieser
• Kaushlendra Singh
• Shreya Pratap
• Omar AbdelSamea

Outcomes

• Presented how communication between the scheduler and agents will be implemented using kubectl exec instead of ssh.
• Tested it with fixed pod name and fixed commands and showed initial good results.

Using kubectl instead of SSH

• As mentioned in this thread using SSH between pods is not recommended.

Using kubectl inside pod

• To use kubectl inside pod, special permissions needs to be granted fro this pod to be able to access the resources data inside the cluster. These permissions are granted using K8s service account
• Scheduler pod needs permissions so it can access pods and use exec command.
• Implemented service-account for scheduler is here https://github.com/OmarAbdelSamea/fossology/blob/OmarAbdelSamea/GSoC/Microservices/k8s/service-account-scheduler.yaml

Issues

1- error: error loading config file "/root/.kube/config": open /root/.kube/config: permission denied

Description

• this issue occurs as .kube folder is created by default inside the root home directory and fossy folder doesn't have permissions to access this folder

Hot Fix

• add o+rwx permissions to /root/.kube permission

End of the week results

• Initially implemented usage of kubectl instead of SSH on agent nomos with a fixed pod name and fixed command.
• Implemented multistage build for fossology:packages base image bringing it down from 2.1GB to 10MB.
• Implemented service-account for scheduler to grant needed permission to run kubectl exec.

Diagrams

Agent-Scheduler meta agents folder