Bug 1114464

Created attachment 913264 [details]
RHEL7 iSCSI Sanboot IP assign fail

Description of problem:
Anaconda does not add the required bootdev argument in kernel command line to set IPv4 address during iSCSI SANboot OS installation. So at boot time IP address does not get assigned to the any of the Ethernet ports that were configured at start of OS installation (Refer attached screen shot - RHEL7_iSCSI_Sanboot_IP_fail). Since IP addresses are not assigned, iSCSI sessions to the target is not established. Hence the root LUN is not discovered at boot time and OS boot fails (Refer attached screen shot - RHEL7_iSCSI_Sanboot_bootup).

Below is the snippet from /etc/grub2.cfg file that shows IPv4 address not being added to kernel cmd line. Though 2 Ethernet ports (ens1f0, ens1f1) are defined along with their respective MAC address, the “ip=” parameter does not have IPv4 address and netmask values.

linux16 /vmlinuz-3.10.0-123.el7.x86_64 root=UUID=2bc9e0c8-31b7-4c74-b755-ba8f645ce741 ro ifname=ens1f0:00:00:c9:b0:47:98 vconsole.keymap=us ip=::::IBMx3550-210-127:ens1f0:none ip=::::IBMx3550-210-127:ens1f1:none ifname=ens1f1:00:00:c9:b0:47:9a netroot=iscsi:@10.10.10.10::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 netroot=iscsi:@11.11.11.11::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 crashkernel=auto  rd.lvm.lv=rhel_210-127/root rd.lvm.lv=rhel_210-127/swap netroot=iscsi:@11.11.11.10::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 iscsi_initiator=iqn.1994-05.com.redhat:127 netroot=iscsi:@10.10.10.11::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 vconsole.font=latarcyrheb-sun16 rhgb quiet LANG=en_US.UTF-8
During the first boot after OS installation, user has to edit the kernel cmd line to add the IPv4 address and netmask values in order to discovery iSCSI sessions, find root LUN and to boot further. Else the OS boot will fail.
Modified cmd line:
linux16 /vmlinuz-3.10.0-123.el7.x86_64 root=UUID=2bc9e0c8-31b7-4c74-b755-ba8f645ce741 ro ifname=ens1f0:00:00:c9:b0:47:98 vconsole.keymap=us ip=10.10.10.127:::255.255.255.0:IBMx3550-210-127:ens1f0:none ip=11.11.11.127:::255.255.255.0:IBMx3550-210-127:ens1f1:none ifname=ens1f1:00:00:c9:b0:47:9a netroot=iscsi:@10.10.10.10::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 netroot=iscsi:@11.11.11.11::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 crashkernel=auto  rd.lvm.lv=rhel_210-127/root rd.lvm.lv=rhel_210-127/swap netroot=iscsi:@11.11.11.10::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 iscsi_initiator=iqn.1994-05.com.redhat:127 netroot=iscsi:@10.10.10.11::3260::iqn.1992-08.com.netapp:sn.5d35f5e7ed9711e3ba53123478563412:vs.10 vconsole.font=latarcyrheb-sun16 rhgb quiet LANG=en_US.UTF-8
This is a regression from RHEL 6.x behavior, where Anaconda used to add the IPv4 address to the respective Ethernet ports in kernel cmd line.


Version-Release number of selected component (if applicable):
OS: RHEL 7.0
Kernel: 3.10.0-123.el7.x86_64
iSCSI: iscsi-initiator-utils-6.2.0.873-21.el7.x86_64
Anaconda: 19.31.79-1

How reproducible:


Steps to Reproduce:
1. Map a SANBoot LUN to RHEL 7.0 iSCSI host
2. Start RHEL 7.0 OS installation on the iSCSI host
3. In the first anaconda OS installation screen, set the IPv4 address on the interface that are intended for establishing iSCSI sessions. In our testbed it was ens1f0, ens1f1.
4. Go to Installation menu, to discovery and login IPv4 iSCSI sessions. Once iSCSI sessions are logged in, the SANBoot LUN is discovered.
5. Select both local disk and SANBoot LUN for creating partitions.
6. In Partition menu, create “/boot” partition on local disk. On SANBoot LUN create “root” (/) and “swap” partitions on top of LVM.
7. Begin OS installation and reboot the host after installation completes.
8. Upon first reboot, IP address is not assigned to any of the Ethernet ports and hence iSCSI sessions are not established (Refer attached screen shot – RHEL7_iSCSI_Sanboot_IP_fail).
9. Since iSCSI login fails, SANBoot LUN is also not discovered and hence OS boot fails (Refer attached screen shot – RHEL7_iSCSI_Sanboot_bootup).


Actual results:
Anaconda does not add required bootdev arguments to kernel cmd line to set IP address to Ethernet ports during iSCSI SANBoot installation.

Expected results:
Anaconda should add necessary bootdev arguments s to kernel cmd line to set IP address on all Ethernet ports that were configured at start of OS installation.

Additional info: