S390x: Difference between revisions

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= The installer =
= Installation guide =
The Alpine s390x installer includes a kernel, an initramfs (initrd image), and a parameter file.
Visit: [[S390x/Installation]]


Installation on KVM and z/VM are supported.
= Docker with Alpine =
Running Alpine s390x containers on Docker: [[S390x/Docker]]


Installation on LPAR is not supported at the moment.
= Known Issues =
 
[[S390x/Known_Issues]]
== Kernel parameters (and parmfile) ==
The Alpine s390x installer requires following kernel parameters to work:
 
<code>ip=</code> : the networking information, each field is separated by a colon <code>:</code>
* 1st field: ip address of the guest VM where we are going to run the installer
* 2nd field: not used, leave blank or fill with <code>none</code>
* 3rd field: the gateway ip address
* 4th field: the netmask
* 5th field: not used, leave blank or fill with <code>none</code>
* 6th field: the network interface of the guest VM, default is <code>eth0</code> if left blank.
* 7th field: fill with <code>none</code> to use static IP configuration. Fill with <code>dhcp</code> if DHCP is used.
* 8th field: address of the DNS server
* 9th field: address of the 2nd DNS server
 
<code>alpine_repo=</code> : the location of the Alpine repository from which packages are downloaded.
 
:For stable release, use <code>http://dl-cdn.alpinelinux.org/alpine/latest-stable/main</code>
 
:For rolling release, use <code>http://dl-cdn.alpinelinux.org/alpine/edge/main</code>
 
<code>modloop=</code> : the remote location of the image containing kernel's modules, required for LVM and raid setup.
 
<code>ssh_key=</code> : the remote location of your SSH public key which is used to allow SSH connection into the installer. HTTPS, FTPS, HTTP, FTP are supported.
 
<code>ssh_pass=</code> : the password to login the installer via SSH.
 
:You can use either <code>ssh_key=</code> or <code>ssh_pass=</code> even though <code>ssh_key=</code> is recommended method.
 
:If neither of these fields are specified, the default password of blank is used (see below).
 
 
'''z/VM only'''
 
<code>dasd=</code> : the addresses of the DASD devices, either ECKD or FBA DASDs. Each device is separated with a comma.
 
<code>s390x_net=</code> : the network interface type and its subchannels. At the moment, only QETH layer 2 is supported, thus the name <code>qeth_l2</code> is used (see below).
 
 
 
= Pre-installation =
 
== KVM ==
On your running s390x host, download the kernel [http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/vmlinuz-vanilla] and initramfs [http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/initramfs-vanilla].
 
Create a virtual disk:
$ qemu-img create alpine_disk.qcow2 5G
 
Start qemu: (modify <code>ip=</code> <code>alpine_repo=</code> <code>ssh_key=</code> <code>ssh_pass=</code> for your needs)
 
$ qemu-system-s390x -M s390-ccw-virtio \
        -m 2048 -smp 2 -nographic -enable-kvm \
        -hda alpine_disk.qcow2 \
        -net nic -net tap,ifname=tap0,script=no'
        -kernel vmlinuz-vanilla \
        -initrd initramfs-vanilla \
        -append "ip=192.168.1.2::192.168.1.1:255.255.255.0:none:eth0:none:8.8.8.8 alpine_repo=http://dl-cdn.alpinelinux.org/alpine/edge/main modloop=http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/modloop-vanilla ssh_key=https://your-website.com/your-ssh-key.pub"
 
== z/VM ==
To ease out the process of downloading the images, punch the readers, ipl, etc., '''ZNETBOOT''' [https://github.com/trothr/znetboot] is used.
 
==== Create the parm file ====
On your workstation/laptop, create a file named <code>alpine.znetboot</code> in your home directory with contents below (modify <code>dasd=</code><code>s390x_net=</code> <code>ip=</code> <code>alpine_repo=</code> <code>ssh_key=</code> <code>ssh_pass=</code> for your needs)
 
(The first line is the line holder for a wide file since z/VM's default file width is 80 chars.)
 
<pre>
# ############################################################################ HOLDER FOR WIDE FILE #
 
ZNETBOOT_KERNEL=http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/vmlinuz-vanilla
ZNETBOOT_INITRD=http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/initramfs-vanilla
ZNETBOOT_PROGRESS=1M
 
dasd=0.0.04c0,0.0.05d1
s390x_net=qeth_l2,0.0.0560,0.0.0561,0.0.0562
 
ip=192.168.1.2::192.168.1.1:255.255.255.0:none:eth0:none:8.8.8.8
alpine_repo=http://dl-cdn.alpinelinux.org/alpine/edge/main
modloop=http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/s390x/modloop-vanilla
ssh_key=https://your-website.com/your-ssh-key.pub
</pre>
 
 
==== Upload to z/VM system via 3270 client ====
[[File:X3270-1.png|right|300px|thumb|Figure 1.]]
On your workstation/laptop, download 2 files <code>znetboot.exec</code> [https://raw.githubusercontent.com/trothr/znetboot/master/znetboot.exec], and <code>curl.rexx</code> [https://raw.githubusercontent.com/trothr/znetboot/master/curl.rexx] to your home directory.
 
Open 3270 client and log in the z/VM system with your z/VM username and password.
 
Upload 3 files <code>alpine.znetboot</code>, <code>znetboot.exec</code>, <code>curl.rexx</code> to the z/VM environment using the 3270 client (this tutorial uses x3270). On the top left corner, click "File", then "File Transfer". (Figure 1.)
 
 
Do following steps : (Figure 2.) [[File:X3270-2.png|right|300px|thumb|Figure 2.]]
* On "Local File Name" box, enter '''alpine.znetboot'''
* On "Host File Name" box, enter '''alpine znetboot'''
* Choose '''Send to host'''
* Choose '''Host is VM/CMS'''
* Click '''Transfer File''' box
 
Repeat the same steps with <code>znetboot.exec</code> and <code>curl.rexx</code> files.
 
Beware the difference between '''the dot <code>.</code>''' and '''the space <code> </code>''' characters in the file names
 
 
==== Check the configuration files ====
On 3270 client, enter following commands to check if the configuration files are correctly transferred:
 
<code>xedit alpine znetboot</code>
 
<code>xedit znetboot exec</code>
 
<code>xedit curl rex</code>


= Tips =


==== Start ZNETBOOT ====
On a default Alpine installation, some firmware packages ({{Pkg|linux-firmware-*|arch=s390x}}) will get installed. On s390x, most of these are not needed.
On 3270 client, type below command and wait till Figure 3.: [[File:X3270-3.png|right|300px|thumb|Figure 3.]]


<code>znetboot alpine</code>
In order to remove them, install the package {{Pkg|linux-firmware-none|arch=s390x}} by running:


{{Cmd|apk add linux-firmware-none}}


= See Also =
* [https://fwupd.org/ LVFS - Linux Vendor Firmware Service]


= Installation =
[[category:IBM]]
Steps in this part does not involve the interaction with the 3270 client anymore. Everything is done in your terminal with SSH client.
 
Either installing in KVM or z/VM environments, from your workstation/laptop, you will be able to run:
$ ssh root@192.168.1.2 (change ip address to what you specified earlier)
 
Remaining steps are similar to installing Alpine on other architectures (x86, arm, ppc, etc.), either on KVM (using virtio/SCSI disks) or on z/VM with FBA DASDs. Installing on ECKD DASDs requires an additional step, as described below.
 
 
== Example ==
Below is the detailed walkthrough of installing Alpine on a single ECKD DASD using LVM and extend that LVM to the second ECKD DASD.
 
 
On SSH client/console, run:
# setup-alpine
 
<code>Select keyboard layout [none]:</code>
:press Enter for none
 
<code>Enter system hostname (short form, e.g. 'foo') [localhost]:</code>
:enter your hostname
 
<pre>
Available interfaces are: eth0.
Enter '?' for help on bridges, bonding and vlans.
Which one do you want to initialize? (or '?' or 'done') [eth0]:</pre>
:type 'eth0' or press Enter
 
<code>Ip address for eth0? (or 'dhcp', 'none', '?') [192.168.1.2]</code>
:enter ip address or 'dhcp'
 
<code>Netmask? [255.255.255.0]</code>
:enter netmask
<code>Gateway? (or 'none') [192.168.1.1]</code>
:enter gateway's ip address
 
<code>Do you want to do any manual network configuration? [no]</code>
:enter 'no' or press Enter
 
<code>DNS domain name? (e.g 'bar.com') []</code>
:enter domain name or press Enter for none
 
<code>DNS nameserver(s)? [8.8.8.8 ]</code>
:enter DNS nameserver
 
<code>Changing password for root</code>
:enter root password
 
<code>Which timezone are you in? ('?' for list) [UTC]</code>
:enter timezone or '?' for list of timezones
 
<code>HTTP/FTP proxy URL? (e.g. 'http://proxy:8080', or 'none') [none]</code>
:enter proxy or press Enter for none
 
<code>Enter mirror number (1-27) or URL to add (or r/f/e/done) [f]:</code>
:enter a number or 'r' or 'f' or 'e' or 'done' as described
 
<code>Which SSH server? ('openssh', 'dropbear' or 'none') [openssh]</code>
:enter SSH server or press Enter for openssh
 
<code>Which NTP client to run? ('busybox', 'openntpd', 'chrony' or 'none') [chrony]</code>
:enter 'busybox' or press Enter for chrony
 
''' (next step is the additional step for ECKD DASDs on z/VM)'''
<pre>
Available ECKD DASD(s) are:
  0.0.04c0 (3390/0c 3990/e9 IBM)
  0.0.05d1 (3390/0c 3990/e9 IBM)
Which ECKD DASD(s) would you like to be formatted using dasdfmt? (enter '?' for help) [all]</pre>
:enter 'all' or '0.0.04c0 0.0.05d1' (separated by a space) to format all/both DASDs
:enter '0.0.04c0' or '0.0.05d1' to format respective DASD
:enter '?' for help
 
<code>WARNING: Erase ECKD DASD 0.0.04c0? [y/N]:</code>
:enter 'y' to format
 
<pre>
Available disks are:
  dasda (2.5 GB IBM 0.0.04c0)
Which disk(s) would you like to use? (or '?' for help or 'none') [dasda]</pre>
:enter 'dasda' or press Enter
 
<pre>
The following disk is selected:
  dasda (2.5 GB IBM 0.0.04c0)
How would you like to use it? ('sys', 'data', 'lvm' or '?' for help) [?]</pre>
:enter 'lvm'
 
<pre>
The following disk is selected (with LVM):
  dasda (2.5 GB IBM 0.0.04c0)
How would you like to use it? ('sys', 'data' or '?' for help) [?]</pre>
:enter 'sys' to install Alpine on disk
 
<pre>
WARNING: The following disk(s) will be erased:
  dasda (2.5 GB IBM 0.0.04c0)
WARNING: Erase the above disk(s) and continue? [y/N]:</pre>
:enter 'y'
 
<code>Installation is complete. Please reboot.</code>
:the installation is finished
 
At this point, don't poweroff the installer right away. Follow below part for directions to have access to your new Alpine system.
 
 
== Copying SSH keys into new Alpine system ==
 
After the installer's done running, there are 2 ways to copy your SSH key into the new Alpine system:
* Option 1: mount the installed disk and copy the SSH keys
* Option 2: poweroff the installer, use the 3270 client to ipl the new Alpine system and copy the SSH keys
 
'''Option 1'''
 
If you use 'lvm' + 'sys' installation scheme above, do:
 
<code> # mount /dev/vg0/lv_root /mnt/</code>
 
::If you use <code>ssh_key=</code> , do:
 
::<code> # cp -ar /root/.ssh/ /mnt/root/</code>
 
::If you use <code>ssh_pass=</code> , do:
::<code> # mkdir /mnt/root/.ssh</code>
::<code> # wget https://your-website.com/your-ssh-key.pub -O /mnt/root/.ssh/authorized_keys</code>
::<code> # chmod 700 /mnt/root/.ssh</code>
::<code> # chmod 600 /mnt/root/.ssh/authorized_keys</code>
 
 
If you use 'sys' (without LVM) installation scheme above, do
 
<code> # mount /dev/dasda3 /mnt/</code> (change dasda to dasdb or dasdc , etc. for which DASD you chose but 3rd partition should be the same)
 
::Then do accordingly for <code>ssh_key</code> or <code>ssh_pass</code> as described above block.
 
 
Then run <code> # poweroff</code>.
 
 
'''Option 2'''
 
Run <code> # poweroff</code>.
 
 
== Login to new Alpine system ==
 
Open the 3270 client, login with your z/VM username and password.
 
You may need to run <code> ipl cms</code>.
 
Then run <code> ipl 04c0</code> (or whichever device you chose as root disk in earlier steps).
 
If you chose '''Option 2''' above, wait for new Alpine system to ipl/boot, then login as root user while in 3270 client. Then run:
::<code> # mkdir /root/.ssh</code>
::<code> # wget https://your-website.com/your-ssh-key.pub -O /root/.ssh/authorized_keys</code>
::<code> # chmod 700 /root/.ssh</code>
::<code> # chmod 600 /root/.ssh/authorized_keys</code>
 
 
Then either '''Option 1''' or '''Option 2''', on your workstation/laptop, use SSH client to login new Alpine system:
::<code> # ssh root@192.168.1.2</code> (or whichever ip address you used)
 
 
 
= Notes =
 
 
 
= Known Issues =

Latest revision as of 21:50, 9 January 2024

Installation guide

Visit: S390x/Installation

Docker with Alpine

Running Alpine s390x containers on Docker: S390x/Docker

Known Issues

S390x/Known_Issues

Tips

On a default Alpine installation, some firmware packages (linux-firmware-*) will get installed. On s390x, most of these are not needed.

In order to remove them, install the package linux-firmware-none by running:

apk add linux-firmware-none

See Also

Retrieved from "https://wiki.alpinelinux.org/w/index.php?title=S390x&oldid=26154"