yahoo-eng-team team mailing list archive

[Stanislav Dmitriev <2084906@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

We manage a cloud infrastructure with extensive network resources and
frequently experience unprovoked router failover events. We believe
these are false positives, likely triggered by high load on network
nodes and overall network fabric instability.

We suspect this issue could be mitigated by reducing the sensitivity of
Keepalived. However, the relevant parameters appear to be hardcoded in
Neutron and are not configurable through the existing configuration
files. The specific parameters in question are:

- `vrrp_script/fall`
- `vrrp_script/rise`
- Ping timeout

We would greatly appreciate the ability to configure these parameters
via the Neutron configuration files, rather than relying on hardcoded
values.

**Environment:**

- Neutron version: 2023.1
- OS: Ubuntu 22.04, Kernel 5.15
- Deployment: Kolla-Ansible
- L3 HA Legacy mode

** Affects: neutron
     Importance: Medium
         Status: New

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https://bugs.launchpad.net/bugs/2084906

Title:
  Hardcoded keepalived configuration parameters

Status in neutron:
  New

Bug description:
  We manage a cloud infrastructure with extensive network resources and
  frequently experience unprovoked router failover events. We believe
  these are false positives, likely triggered by high load on network
  nodes and overall network fabric instability.

  We suspect this issue could be mitigated by reducing the sensitivity
  of Keepalived. However, the relevant parameters appear to be hardcoded
  in Neutron and are not configurable through the existing configuration
  files. The specific parameters in question are:

  - `vrrp_script/fall`
  - `vrrp_script/rise`
  - Ping timeout

  We would greatly appreciate the ability to configure these parameters
  via the Neutron configuration files, rather than relying on hardcoded
  values.

  **Environment:**

  - Neutron version: 2023.1
  - OS: Ubuntu 22.04, Kernel 5.15
  - Deployment: Kolla-Ansible
  - L3 HA Legacy mode

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