Tag Archives: rhel

libguestfs for RHEL 7.5 preview

As usual I’ve placed the proposed RHEL 7.5 libguestfs packages in a public repository so you can try them out.

Thanks to Pino Toscano for doing the packaging work.

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Gigabyte Cavium ARM servers

http://b2b.gigabyte.com/products/list.aspx?s=92&p=190&v=1029&ck=102

Gigabyte just announced a bunch of full ARM servers, with between 32 and 96 cores. They are based around the Cavium ThunderX processors that we’ve had at Red Hat for a while so they should run RHEL either out of the box or very soon after release.

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Gigabyte MP30-AR0: IPMI

IPMI works out of the box. I’m using FreeIPMI to test this (not ipmitool) since FreeIPMI is a lot easier to use.

You need to know that:

  1. The default user name is admin and the default password is password.
  2. You have to use the dedicated management interface, marked “f” in the software reference guide (the ethernet port above the two USB sockets).

Here are the sensors:

$ ipmi-sensors -h 192.168.0.104 -u admin -p password
Caching SDR repository information: /home/rjones/.freeipmi/sdr-cache/sdr-cache-moo.192.168.0.104
Caching SDR record 34 of 34 (current record ID 205) 
ID  | Name       | Type                   | Reading    | Units | Event
4   | CPU0_TEMP  | Temperature            | 49.00      | C     | 'OK'
9   | DIMM_P0_A0 | Temperature            | N/A        | C     | N/A
10  | DIMM_P0_A1 | Temperature            | N/A        | C     | N/A
12  | DIMM_P0_B0 | Temperature            | N/A        | C     | N/A
13  | DIMM_P0_B1 | Temperature            | N/A        | C     | N/A
15  | DIMM_P0_C0 | Temperature            | N/A        | C     | N/A
16  | DIMM_P0_C1 | Temperature            | N/A        | C     | N/A
18  | DIMM_P0_D0 | Temperature            | N/A        | C     | N/A
19  | DIMM_P0_D1 | Temperature            | N/A        | C     | N/A
59  | P12V       | Voltage                | 11.83      | V     | 'OK'
60  | P5V        | Voltage                | 5.11       | V     | 'OK'
61  | P3V3       | Voltage                | 3.33       | V     | 'OK'
62  | P5V_STBY   | Voltage                | 5.13       | V     | 'OK'
64  | P_VBAT     | Voltage                | 3.07       | V     | 'OK'
65  | P_VCCP     | Voltage                | 0.97       | V     | 'OK'
66  | P_1V2_HUB  | Voltage                | 1.20       | V     | 'OK'
67  | P_VDDQ_AB  | Voltage                | 1.50       | V     | 'OK'
68  | P_VDDQ_CD  | Voltage                | 1.50       | V     | 'OK'
71  | P_0V9_VDD  | Voltage                | 0.96       | V     | 'OK'
72  | P_1V5_VDD  | Voltage                | 1.52       | V     | 'OK'
73  | P_2V5_VDD  | Voltage                | 2.50       | V     | 'OK'
74  | P_1V8_VDD  | Voltage                | 1.82       | V     | 'OK'
136 | CPU0_FAN   | Fan                    | 4000.00    | RPM   | 'OK'
138 | SYS_FAN1   | Fan                    | N/A        | RPM   | N/A
139 | SYS_FAN2   | Fan                    | N/A        | RPM   | N/A
140 | SYS_FAN3   | Fan                    | N/A        | RPM   | N/A
141 | SYS_FAN4   | Fan                    | N/A        | RPM   | N/A
190 | CPU0       | Processor              | N/A        | N/A   | 'Processor Presence detected'
202 | MB_TEMP1   | Temperature            | 37.00      | C     | 'OK'
203 | MB_TEMP2   | Temperature            | 31.00      | C     | 'OK'
204 | MB_TEMP3   | Temperature            | 28.00      | C     | 'OK'
205 | SEL        | Event Logging Disabled | N/A        | N/A   | 'OK'

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Gigabyte MP30-AR0: RHEL running with ACPI

Turns out that acpi=off is only needed by the RHEL 7.2 installer kernel. After installation, ACPI works fine. That might be because the installer kernel is older than the current RHEL 7 kernel. dmesg output after the break.

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Gigabyte MP30-AR0: RHEL is running

dmesg and other stuff after the break.

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Gigabyte MP30-AR0

This is the Gigabyte MP30-AR0 which now forms the top “layer” of my cluster (I had to retire one of the AMD boards in order to scavenge the RAM for this).

20160304_141928.jpg

The Gigabyte uses the APM X-gene1, which is an 8 core ARM processor. This is rather old now — I’ve had a Mustang at home with the same processor for a couple of years now and the chip design itself is 3+ years old. It uses Cortex A53 cores. Even APM have a newer X-gene 2. Nevertheless it has two very big advantages over the alternatives:

  1. You can actually buy it. I had this one shipped overnight from UK supplier Xcase.
  2. It’s (sort of — see below) server class hardware, unlike the very cheap but ultimately crap development boards based on phone chips.

A particularly annoying thing at the moment is that Gigabyte are claiming this board is SBSA compliant, but then they ship it with u-boot as firmware. However UEFI firmware can be downloaded, see this thread, so it should run RHEL.

Here are the boot messages to the u-boot prompt:

U-Boot 2013.04 (Jun 02 2015 - 10:54:10)         REV: 1.15.01-F05 ( uart0 )

CPU0: APM ARM 64-bit Potenza Rev B0 2400MHz PCP 2400MHz
     32 KB ICACHE, 32 KB DCACHE
     SOC 2000MHz IOBAXI 400MHz AXI 250MHz AHB 200MHz GFC 125MHz
Boot from SPI-NOR
Slimpro FW:
        Ver: 2.4 (build 01.15.01.00 2015/05/22)
        TPC: disabled
        AVS: supported (margin: -0mV)
        RST: supported
        PWROFF: supported
        PMD: 970 mV
        SOC: 950 mV
Board: GIGABYTE MP30AR0 - AppliedMicro APM883408-xNA24SPT Customer Board
I2C:   ready

DRAM: 32 GiB @ 1600MHz...
SF: Detected MX25L25635F with page size 64 KiB, total 32 MiB

MMC:   X-Gene SD/SDIO/eMMC: 0
PCIE0: (RC) link down
PCIE2: (RC) X1 GEN-1 link up
PCIE3: (RC) link down
  00:00.0     - 10e8:e004 - Bridge device
   01:00.0    - 1a03:1150 - Bridge device
    02:00.0   - 1a03:2000 - Display controller
Video: ASPEED VGA Card (1a03, 2000) found @(2:0:0)
Mode: 1024x768x32 48kHz 60Hz
In:    serial
Out:   vga
Err:   serial
CPUs:  11111111
Net:   eth0
USB0:   scanning bus 0 for devices... XHCI: WARN: Didn't find a matching TT
3 USB Device(s) found
USB1:   scanning bus 1 for devices... 2 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
XHCI: ep 0x1 - rounding interval to 128 microframes
XHCI-ERR: xhci_submit_async_int !
Register 1 keyboards
Hit any key to stop autoboot:  0 

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Tip: Updating RHEL 7.1 cloud images using virt-customize and subscription-manager

Red Hat provide RHEL KVM guest and cloud images. At time of writing, the last one was built in Feb 2015, and so undoubtedly contains packages which are out of date or insecure.

You can use virt-customize to update the packages in the cloud image. This requires the libguestfs subscription-manager feature which will only be available in RHEL 7.3, but see here for RHEL 7.3 preview packages. Alternatively you can use Fedora ≥ 22.

$ virt-customize \
  -a rhel-guest-image-7.1-20150224.0.x86_64.qcow2 \
  --sm-credentials 'USERNAME:password:PASSWORD' \
  --sm-register --sm-attach auto \
  --update
[   0.0] Examining the guest ...
[  17.2] Setting a random seed
[  17.2] Registering with subscription-manager
[  28.8] Attaching to compatible subscriptions
[  61.3] Updating core packages
[ 976.8] Finishing off
  1. You should probably use --sm-credentials USERNAME:file:FILENAME to specify your password using a file, rather than having it exposed on the command line.
  2. The command above will leave the image template registered to RHN. To unregister it, add --sm-unregister at the end.

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