Bug 1733072

Summary: [OVN]"Unit ovn-northd.service could not be found" report when install OVN central and host package
Product: Red Hat Enterprise Linux Fast Datapath Reporter: haidong li <haili>
Component: OVNAssignee: Mark Michelson <mmichels>
Status: CLOSED NOTABUG QA Contact: Jianlin Shi <jishi>
Severity: low Docs Contact:
Priority: low    
Version: FDP 19.ECC: ctrautma, jishi, mmichels, nusiddiq, rkhan
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Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Last Closed: 2020-08-21 14:58:46 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description haidong li 2019-07-25 07:23:49 UTC 
Description of problem:
"Unit ovn-northd.service could not be found" report when install OVN central and host packages

Version-Release number of selected component (if applicable):
[root@dell-per730-42 ~]# uname -a
Linux dell-per730-42.rhts.eng.pek2.redhat.com 4.18.0-107.el8.x86_64 #1 SMP Fri Jun 14 13:46:34 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@dell-per730-42 ~]# rpm -qa | grep openvswitch
openvswitch2.11-2.11.0-18.el8fdp.x86_64
openvswitch-selinux-extra-policy-1.0-16.el8fdp.noarch
[root@dell-per730-42 ~]# rpm -qa | grep ovn
ovn2.11-2.11.0-26.el8fdp.x86_64
ovn2.11-central-2.11.0-26.el8fdp.x86_64
ovn2.11-host-2.11.0-26.el8fdp.x86_64
[root@dell-per730-42 ~]# 

How reproducible:
everytime

Steps to Reproduce:
[root@dell-per730-17 ~]# rpm -ivh http://download-node-02.eng.bos.redhat.com/brewroot/packages/openvswitch2.11/2.11.0/18.el8fdp/x86_64/openvswitch2.11-2.11.0-18.el8fdp.x86_64.rpm 
Retrieving http://download-node-02.eng.bos.redhat.com/brewroot/packages/openvswitch2.11/2.11.0/18.el8fdp/x86_64/openvswitch2.11-2.11.0-18.el8fdp.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:openvswitch2.11-2.11.0-18.el8fdp ################################# [100%]
[root@dell-per730-17 ~]# rpm -ivh http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-2.11.0-26.el8fdp.x86_64.rpm
Retrieving http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-2.11.0-26.el8fdp.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:ovn2.11-2.11.0-26.el8fdp         ################################# [100%]
[root@dell-per730-17 ~]# rpm -ivh http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-central-2.11.0-26.el8fdp.x86_64.rpm
Retrieving http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-central-2.11.0-26.el8fdp.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Unit ovn-northd.service could not be found.
Updating / installing...
   1:ovn2.11-central-2.11.0-26.el8fdp ################################# [100%]
[root@dell-per730-17 ~]# rpm -ivh http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-host-2.11.0-26.el8fdp.x86_64.rpm
Retrieving http://download-node-02.eng.bos.redhat.com/brewroot/packages/ovn2.11/2.11.0/26.el8fdp/x86_64/ovn2.11-host-2.11.0-26.el8fdp.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Unit ovn-controller.service could not be found.
Updating / installing...
   1:ovn2.11-host-2.11.0-26.el8fdp    ################################# [100%]

Actual results:


Expected results:
no extra info displayed

Additional info:
Comment 1 Mark Michelson 2019-08-02 20:19:47 UTC 
This message is being displayed due to a preinstallation hook in the spec file. When ovn-host is installed, it tries to determine if ovn-controller is running, and if the old openvswitch-ovn-host package is installed. If the service is running, then the installation of ovn-host will automatically start the service again as part of installation. The same check is performed for the ovn-central package, except that it checks if ovn-northd is running and if the old openvswitch-ovn-central package is installed.

Since you are installing the packages on a new system, when systemd checks if ovn-controller or ovn-northd is running, it returns an error saying the service cannot be found. This doesn't actually cause a problem, but it can be alarming to see such a message during package installation. I think the proper fix in this case is to suppress the output from the `systemctl status` command.
Comment 2 Mark Michelson 2019-08-06 19:04:00 UTC 
I've submitted a fix upstream and have fixed this problem in the fast-datapth-next-rhel-7 branch.
Comment 3 Mark Michelson 2020-04-13 13:57:18 UTC 
*** Bug 1771907 has been marked as a duplicate of this bug. ***
Comment 4 Numan Siddique 2020-08-21 14:58:46 UTC 
The BZ 1771907 which is a duplicate of this BZ has addressed it and 1771907 is already closed.
So closing this BZ.