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Bug 1351283

Summary: Host kernel configuration: mention reinstall and reboot host is needed as part of webadmin kernel modification procedure.
Product: [oVirt] ovirt-engine Reporter: Nisim Simsolo <nsimsolo>
Component: Frontend.WebAdminAssignee: Sharon Gratch <sgratch>
Status: CLOSED CURRENTRELEASE QA Contact: Nisim Simsolo <nsimsolo>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0.0CC: bugs, michal.skrivanek, nsimsolo, sbonazzo, tjelinek
Target Milestone: ovirt-4.0.2Flags: rule-engine: ovirt-4.0.z+
rule-engine: planning_ack+
michal.skrivanek: devel_ack+
rule-engine: testing_ack+
Target Release: 4.0.2.1   
Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of: Environment:
Last Closed: 2016-08-22 12:30:51 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Virt RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
edit host -> kernel dialog screenshot none

Description Nisim Simsolo 2016-06-29 15:32:45 UTC 
Description of problem:
In order to modify kernel boot parameters from webadmin (hosts tab -> edit host -> kernel tab), the admin must reinstall and reboot the host after modifying the kernel cmdline.
In the kernel dialog it's unclear that this procedure is needed in order to make the changes to take effect.

Version-Release number of selected component (if applicable):
ovirt-engine-4.1.0-0.0.master.20160622231316.git038ce87.el7.centos
vdsm-4.18.999-170.git0a993e4.el7.centos.x86_64
libvirt-client-1.2.17-13.el7_2.5.x86_64
qemu-kvm-rhev-2.3.0-31.el7_2.17.x86_64

How reproducible:


Steps to Reproduce:
1. Browse webadmin and navigate to hosts tab -> edit host -> kernel tab.
2. Check "PCI Reallocation" checkbox and click "ok" button.
3.

Actual results:
changes do not take effect, although the "kernel command line" text box is filled with the parameters.

Expected results:
Mention in the dialog or after clicking "ok" button, that reinstall host and reboot host afterward is needed in order to make changes take effect.

Additional info:
Edit host dialog screenshot attached.
Comment 1 Nisim Simsolo 2016-06-29 15:33:31 UTC 
Created attachment 1173999 [details]
edit host -> kernel dialog screenshot
Comment 2 Sharon Gratch 2016-07-20 10:12:25 UTC 
We improve the message as appears in Kernel boot parameters dialog for emphasizing that reinstall and restart is needed in order to make kernel parameters changes to take effect.

Anyway, we should consider changing this dialog to enable running restart+reinstall for that host immediately after kernel parameters changing. Either by using a wizard or by moving this dialog from "edit host" to Management/Installations menus and calling it "reinstall with additional kernel boot parameters" or something like that..
Comment 3 Michal Skrivanek 2016-07-25 10:14:53 UTC 
trivial text-only change for 4.0.2
Comment 4 Nisim Simsolo 2016-08-21 13:48:21 UTC 
Verified, ovirt-engine-4.0.2.6-0.1.el7ev