0017405: keepalived stops working after a while

ID	Project	Category	View Status	Date Submitted	Last Update

0017405	CentOS-8	keepalived	public	2020-05-27 11:34	2020-12-02 14:56

Reporter	mihkela	Assigned To
Priority	normal	Severity	major	Reproducibility	random
Status	new	Resolution	open
Platform	x86_64/VMware	OS	CentOS	OS Version	8.1.1911
Product Version	8.1.1911

Summary	0017405: keepalived stops working after a while
Description	Sometimes keepalived daemons stop participating in the group and start using a lot of CPU. This results in good cluster members losing the floating IP and less healthy (broken) members receiving it. Looks like this upstream issue: https://github.com/acassen/keepalived/issues/1364
Steps To Reproduce	1. Set up keepalived with frequent check scripts. A vrrp_script checking for a process with "killall -0" every second is a common pattern. 2. After some hours/days/weeks keepalived reports something like 'Track script prcheck_nginx is already running, expect idle - skipping run'. 3. There are no more logs, the daemon uses 100% of CPU and no longer advertises its state.
Additional Information	We have built a new keepalived package from latest sources, but it will be some time before we can say if the problem is gone.
Tags	No tags attached.

Date Modified	Username	Field	Change
2020-05-27 11:34	mihkela	New Issue
2020-12-02 14:56	sindre	Note Added: 0038026

sindre 2020-12-02 14:56 reporter ~0038026	Still in CentOS 8.2.2004 Bug is fixed in keepalived 2.0.12 (as noted in bug 0017088) I have used the workaround with setting a timeout on the keepalived check script, but today keepalived went to 100% cpu and caused problems. With no such timeout, this always happens after a time.