I suspect that valudate action is run as a non-root user.
Madison Kelly <mke...@alteeve.com> 11 января 2023 г. 07:06:55 написал:
On 2023-01-11 00:21, Madison Kelly wrote:
On 2023-01-11 00:14, Madison Kelly wrote:
Hi all,
Edit: Last message was in HTML format, sorry about that.
I've got a hell of a weird problem, and I am absolutely stumped on
what's going on.
The short of it is; if my RA is called from the command line, it's
fine. If a resource exists, monitor, enable, disable, all that stuff
works just fine. If I try to create a resource, it hangs on the
validate stage. Specifically, it hangs when 'pcs' calls:
crm_resource --validate --output-as xml --class ocf --agent server
--provider alteeve --option name=<resource_name>
Specifically, it hangs when it tries to make a shell call (to
virsh, specifically, but that doesn't matter). So to debug, I started
stripping down my RA simpler and simpler until I was left with the
very most basic of programs;
https://pastebin.com/VtSpkwMr
That is literally the simplest program I could write that made the
shell call. The 'open()' call is where it hangs.
When I call directly;
time /usr/lib/ocf/resource.d/alteeve/server --validate-all --server
srv04-test; echo rc:$?
====
real 0m0.061s
user 0m0.037s
sys 0m0.014s
rc:0
====
It's just fine. I can see in the log the output from the 'virsh' call
as well. However, when I call from crm_resource;
time crm_resource --validate --output-as xml --class ocf --agent
server --provider alteeve --option name=srv04-test; echo rc:$?
====
<pacemaker-result api-version="2.25" request="crm_resource --validate
--output-as xml --class ocf --agent server --provider alteeve --option
name=srv04-test">
<resource-agent-action action="validate" class="ocf" type="server"
provider="alteeve">
<overrides/>
<agent-status code="1" message="error" execution_code="2"
execution_message="Timed Out" reason="Resource agent did not exit
within specified timeout"/>
</resource-agent-action>
<status code="1" message="Error occurred">
<errors>
<error>crm_resource: Error performing operation: Error
occurred</error>
</errors>
</status>
</pacemaker-result>
real 0m20.521s
user 0m0.022s
sys 0m0.010s
rc:1
====
In the log file, I see (from line 20 of the super-simple-test-script):
====
Calling: [/usr/bin/virsh dumpxml --inactive srv04-test 2>&1;
/usr/bin/echo return_code:0 |]
====
Then nothing else.
The strace output is: https://pastebin.com/raw/UCEUdBeP
Environment;
* selinux is permissive
* Pacemaker 2.1.5-4.el8
* pcs 0.10.15
* 4.18.0-408.el8.x86_64
* CentOS Stream release 8
Any help is appreciated, I am stumped. :/
After sending this, I tried having my "RA" call 'hostname', and that
worked fine. I switched back to 'virsh list --all', and that hangs. So
it seems to somehow be related to call 'virsh' specifically.
OK, so more info... Knowing now that it's a problem with the virsh call
specifically (but only when validating, existing VMs monitor, enable,
disable fine, all which repeatedly call virsh), I noticed a few things.
First, I see in the logs:
====
Jan 11 00:30:43 mk-a07n02.digimer.ca libvirtd[2937]: Cannot recv data:
Connection reset by peer
====
So with this, I further simplified my test script to this:
https://pastebin.com/Ey8FdL1t
Then when I ran my test script directly, the strace output is:
Good: https://pastebin.com/Trbq67ub
When my script is called via crm_resource, the strace is this:
Bad: https://pastebin.com/jtbzHrUM
The first difference I can see happens around line 929 in the good
paste, the line "futex(0x7f48b0001ca0, FUTEX_WAKE_PRIVATE, 1) = 0"
exists, which doesn't in the bad paste. Shortly after, I start seeing:
====
line: [write(4, "\1\0\0\0\0\0\0\0", 8) = 8]
line: [brk(NULL) = 0x562b7877d000]
line: [brk(0x562b787aa000) = 0x562b787aa000]
line: [write(4, "\1\0\0\0\0\0\0\0", 8) = 8]
====
Around line 959 in the bad paste. There are more brk() lines, and not
long after the output stops.
--
Madison Kelly
Alteeve's Niche!
Chief Technical Officer
c: +1-647-471-0951
https://alteeve.com/
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