Bug 2036408
| Summary: | Change default pulp workers if RHUA has lower cpu count | ||
|---|---|---|---|
| Product: | Red Hat Update Infrastructure for Cloud Providers | Reporter: | Paul Dudley <pdudley> |
| Component: | RHUA | Assignee: | RHUI Bug List <rhui-bugs> |
| Status: | CLOSED ERRATA | QA Contact: | Radek Bíba <rbiba> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 4.0.0 | CC: | gtanzill, pbartiko |
| Target Milestone: | 4.4.0 | Keywords: | Triaged |
| Target Release: | 4.x | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-05-03 14:56:19 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Pulp docs [1] state anywhere from 1-3 GB should be allocated per pulp worker. If a RHUI system of 4CPUs and 8GB memory, which still fits the requirements in the docs, is created with 8 workers and is managing many repositories we should reasonably doubt that this would be stable long-term. [1] https://docs.pulpproject.org/pulpcore/installation/hardware-requirements.html Adding another task to the playbook to adjust the variable helped reduce cpu count when the rhui-installer is run: ~~~ 70 71 - name: Set Pulp_workers to less than 8 if VCPU<8 72 set_fact: 73 pulp_workers: "{{ ansible_processor_vcpus }}" 74 when: 'ansible_processor_vcpus < 8' 75 ~~~ This is just an example of what could work before permanent changes are made, assuming the ansible fact above returns the proper cpu count. It seems like initially, the documentation and/or the default number of workers should be changed so that they are in alignment. Perhaps, the documentation should be changed to state the amount of RAM per worker should be 4GB. Also, at a minimum, that should be no more than 1 worker per CPU core. This is what is recommended for Pulp. This would be in addition to implementing the suggested dynamic worker setting. RHUI 4.4 will bring an installer option to set the number of Pulp workers. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: RHUI 4.4.0 release - Security Fixes, Bug Fixes, and Enhancements Update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2023:2101 |
Currently pulp workers are set to 8 and this is hard-coded in the `/usr/share/rhui-installer/playbooks/rhua-provision.yml` file here: ~~~ vars: - pulp_workers: 8 ~~~ With the minimum hardware settings from the docs of 4 cpus and 8GB memory 8 workers is likely not the best case for these systems. It would be good if worker count could be set dynamically based on cpus present up to a certain value, perhaps something like 'if less than 8 cpus are present set the worker count to match cpus'.