Non-interactive IBM z/VM (s390x) autoinstallation
Note:
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This non-interactive installation uses ‘autoinstall’, which can be considered the successor to the Debian installer (d-i) and preseed on Ubuntu. This is a detailed step-by-step guide, including output and logs (which are partially a bit shortened, as indicated by ‘…’, to limit the size of this document).
The example z/VM guest here uses a direct-access storage device (DASD) and is connected to a regular (non-VLAN) network.
For a zFCP and a VLAN network example, please see the non-interactive IBM LPAR (s390x) installation using autoinstall guide.
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Start with the preparation of the (FTP) install server (if it doesn’t already exist).
user@local:~$ ssh admin@installserver.local admin@installserver:~$ mkdir -p /srv/ftp/ubuntu-daily-live-server-20.04 admin@installserver:~$ wget http://cdimage.ubuntu.com/ubuntu-server/focal/daily-live/current/focal-live-server-s390x.iso --directory-prefix=/srv/ftp/ubuntu-daily-live-server-20.04 --2020-06-26 12:18:48-- http://cdimage.ubuntu.com/ubuntu-server/focal/daily-live/current/focal-live-server-s390x.iso Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 2001:67c:1560:8001::1d, 2001:67c:1360:8001::28, 2001:67c:1360:8001::27, ... Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|2001:67c:1560:8001::1d|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 700952576 (668M) [application/x-iso9660-image] Saving to: ‘focal-live-server-s390x.iso’ focal-live-server-s 100%[===================>] 668.48M 2.73MB/s in 4m 54s 2020-06-26 12:23:42 (2.27 MB/s) - ‘focal-live-server-s390x.iso’ saved [700952576/700952576] admin@installserver:~$ -
The ISO image needs to be extracted now. Since files in the boot folder need to be modified, loopback mount is not an option here:
admin@installserver:~$ cd /srv/ftp/ubuntu-daily-live-server-20.04 admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ mkdir iso admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ sudo mount -o loop ./focal-live-server-s390x.iso ./iso [sudo] password for admin: mount: /home/user/iso-test/iso: WARNING: device write-protected, mounted read-only. admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ ls -l total 684530 -rw-rw-r-- 1 user user 700952576 Jun 26 10:12 focal-live-server-s390x.iso dr-xr-xr-x 10 root root 2048 Jun 26 10:12 iso admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ -
Now make sure an FTP server is running in the installserver with
/srv/ftpas ftp-server root (as used in this example). -
Next, prepare an autoinstall (HTTP) server. This hosts the configuration data for the non-interactive installation.
admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ mkdir -p /srv/www/autoinstall/zvmguest admin@installserver:/srv/ftp/ubuntu-daily-live-server-20.04$ cd /srv/www/autoinstall/zvmguest admin@installserver:/srv/www/autoinstall/zvmguest$ admin@installserver:/srv/www/autoinstall/zvmguest$ echo "instance-id: $(uuidgen || openssl rand -base64 8)" > meta-data admin@installserver:/srv/www/autoinstall/zvmguest$ cat meta-data instance-id: 2c2215fb-6a38-417f-b72f-376b1cc44f01 admin@installserver:/srv/www/autoinstall/zvmguest$admin@installserver:/srv/www/autoinstall/zvmguest$ vi user-data admin@installserver:/srv/www/autoinstall/zvmguest$ cat user-data #cloud-config autoinstall: version: 1 refresh-installer: update: yes reporting: builtin: type: print apt: preserve_sources_list: false primary: - arches: [amd64, i386] uri: http://archive.ubuntu.com/ubuntu - arches: [default] uri: http://ports.ubuntu.com/ubuntu-ports keyboard: layout: en variant: us locale: en_US identity: hostname: zvmguest password: "$6$ebJ1f8wxED22bTL4F46P0" username: ubuntu user-data: timezone: America/Boston users: - name: ubuntu password: "$6$KwuxED22bTL4F46P0" lock_passwd: false early-commands: - touch /tmp/lets_activate_the_s390x_devices - chzdev dasd -e 1f00 - touch /tmp/s390x_devices_activation_done network: version: 2 ethernets: enc600: addresses: [10.11.12.23/24] gateway4: 10.11.12.1 nameservers: addresses: [10.11.12.1] ssh: install-server: true allow-pw: true authorized-keys: ['ssh-rsa meQwtZ user@workstation # ssh-import-id lp:user'] admin@installserver:~$ -
For s390x installations, the
early-commandssection is the interesting part:early-commands: - touch /tmp/lets_activate_the_s390x_devices - chzdev dasd -e 1f00 - touch /tmp/s390x_devices_activation_doneThe first and last
early-commandsare optional; they only frame and indicate the real s390x command activation.In this particular example a single DASD ECKD disk with the address
1f00is enabled. zFCP disk storage can be enabled via their host (host-bus-adapters) addresses, for example e000 (chzdev zfcp -e e000) and e100 (chzdev zfcp -e e000). These have certain Logical Unit Numbers (LUNs) assigned, which are all automatically discovered and activated bychzdev zfcp-lun -e --online. Activation of a qeth device would look like this:chzdev qeth -e 0600. -
For more details about the autoinstall config options, please have a look at the autoinstall reference and autoinstall schema page.
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Now make sure a HTTP server is running with
/srv/wwwas web-server root (in this particular example). -
Log in to your z/VM system using your preferred 3270 client – for example x3270 or c3270.
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Transfer the installer kernel, initrd, parmfile and exec file to the z/VM system that is used for the installation. Put these files (for example) on File Mode (Fm) A (a.k.a disk A):
listfiles UBUNTU EXEC A1 KERNEL UBUNTU A1 INITRD UBUNTU A1 PARMFILE UBUNTU A1 -
Now specify the necessary autoinstall parameters in the parmfile:
xedit PARMFILE UBUNTU A PARMFILE UBUNTU O1 F 80 Trunc=80 Size=3 Line=0 Col=1 Alt=0 00000 * * * Top of File * * * 00001 ip=10.11.12.23::10.11.12.1:255.255.255.0:zvmguest:enc600:none:10.11.12.1 00002 url=ftp://installserver.local:21/ubuntu-daily-live-server-20.04/focal-li ve-ser 00003 ver-s390x.iso autoinstall ds=nocloud-net;s=http://installserver.local:80 00004 /autoinstall/zvmguest/ --- quiet 00005 * * * End of File * * *
Note:
In case of any issues hitting the 80-character-per-line limit of the file, you can write parameters across two lines as long as there are no unwanted white spaces. To view all 80 characters in one line, disable the prefix area on the left. “prefix off | on” will be your friend – use it in the command area.
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You can now start the z/VM installation by executing the
UBUNTU REXXscript withUBUNTU. -
Now monitor the initial program load (IPL) – a.k.a. the boot-up process – of the install system. This is quite crucial, because during this process a temporary installation password is generated and displayed. The line(s) look similar to this:
... |37.487141| cloud-init¬1873|: Set the following 'random' passwords |37.487176| cloud-init¬1873|: installer: **i7UFdP8fhiVVMme3qqH8** ...This password is needed for remotely connecting to the installer via SSH in the next step.
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So, start the
REXXscript:UBUNTU 00: 0000004 FILES PURGED 00: RDR FILE 1254 SENT FROM zvmguest PUN WAS 1254 RECS 102K CPY 001 A NOHOLD NO KEEP 00: RDR FILE 1258 SENT FROM zvmguest PUN WAS 1258 RECS 0003 CPY 001 A NOHOLD NO KEEP 00: RDR FILE 1262 SENT FROM zvmguest PUN WAS 1262 RECS 303K CPY 001 A NOHOLD NO KEEP 00: 0000003 FILES CHANGED 00: 0000003 FILES CHANGED 01: HCPGSP2627I The virtual machine is placed in CP mode due to a SIGP initial C PU reset from CPU 00. 02: HCPGSP2627I The virtual machine is placed in CP mode due to a SIGP initial C PU reset from CPU 00. 03: HCPGSP2627I The virtual machine is placed in CP mode due to a SIGP initial C PU reset from CPU 00. ¬ 0.403380| Initramfs unpacking failed: Decoding failed ln: /tmp/mountroot-fail-hooks.d//scripts/init-premount/lvm2: No such file or dir ectory QETH device 0.0.0600:0.0.0601:0.0.0602 configured IP-Config: enc600 hardware address 02:28:0b:00:00:51 mtu 1500 IP-Config: enc600 guessed broadcast address 10.11.12.255 IP-Config: enc600 complete: address: 10.11.12.23 broadcast: 10.210.210.255 netmask: 255.255.255.0 gateway: 10.11.12.1 dns0 : 10.11.12.1 dns1 : 0.0.0.0 host : zvmguest rootserver: 0.0.0.0 rootpath: filename : Connecting to installserver.local:21 (10.11.12.2:21) focal-live-server-s3 2% ! ! 15.2M 0:00:48 ETA focal-live-server-s3 16% !***** ! 126M 0:00:09 ETA focal-live-server-s3 31% !********** ! 236M 0:00:06 ETA focal-live-server-s3 46% !************** ! 347M 0:00:04 ETA focal-live-server-s3 60% !******************* ! 456M 0:00:03 ETA focal-live-server-s3 74% !*********************** ! 563M 0:00:02 ETA focal-live-server-s3 88% !**************************** ! 667M 0:00:00 ETA focal-live-server-s3 100% !********************************! 752M 0:00:00 ETA mount: mounting /cow on /root/cow failed: No such file or directory Connecting to plymouth: Connection refused passwd: password expiry information changed. ¬ 16.748137| /dev/loop3: Can't open blockdev ¬ 17.908156| systemd¬1|: Failed unmounting /cdrom. ¬ ¬0;1;31mFAILED ¬0m| Failed unmounting ¬0;1;39m/cdrom ¬0m. ¬ ¬0;32m OK ¬0m| Listening on ¬0;1;39mJournal Socket ¬0m. Mounting ¬0;1;39mHuge Pages File System ¬0m... Mounting ¬0;1;39mPOSIX Message Queue File System ¬0m... Mounting ¬0;1;39mKernel Debug File System ¬0m... Starting ¬0;1;39mJournal Service ¬0m... ... [ 61.190916] cloud-init[2076]: Cloud-init v. 20.1-10-g71af48df-0ubuntu5 running 'modules:final' at Fri, 26 Jun 2020 11:02:01 +0000. Up 61.09 seconds. [ 61.191002] cloud-init[2076]: ci-info: no authorized SSH keys fingerprints fo und for user installer. [ 61.191071] cloud-init[2076]: Cloud-init v. 20.1-10-g71af48df-0ubuntu5 finished at Fri, 26 Jun 2020 11:02:01 +0000. Datasource DataSourceNoCloudNet [seed=cmdline, /var/lib/cloud/seed/nocloud, http://installserver.local:80/autoinstall/zvmguest/] [dsmode=net]. Up 61.18 seconds [ 61.191136] cloud-init[2076]: Welcome to Ubuntu Server Installer! [ 61.191202] cloud-init[2076]: Above you will find SSH host keys and a random password set for the `installer` user. You can use these credentials to ssh-in and complete the installation. If you provided SSH keys in the cloud-init datasource, they were also provisioned to the installer user. [ 61.191273] cloud-init[2076]: If you have access to the graphical console, like TTY1 or HMC ASCII terminal you can complete the installation there too. It is possible to connect to the installer over the network, which might allow the use of a more capable terminal. To connect, SSH to installer@10.11.12.23. The password you should use is ''i7UFdP8fhiVVMme3qqH8''. The host key fingerprints are: RSA SHA256:rBXLeUke3D4gKdsruKEajHjocxc9hr3PI ECDSA SHA256:KZZYFswtKxFXWQPuQS9QpOBUoS6RHswis ED25519 SHA256:s+5tZfagx0zffC6gYRGW3t1KcBH6f+Vt0 Ubuntu 20.04 LTS ubuntu-server sclp_line0 -
At short notice, you can even log in to the system with the user ‘installer’ and the temporary password that was given at the end of the boot-up process (see above) of the installation system:
user@workstation:~$ ssh installer@zvmguest The authenticity of host 'zvmguest (10.11.12.23)' can't be established. ECDSA key fingerprint is SHA256:O/dU/D8jJAEGQcbqKGE9La24IRxUPLpzzs5li9F6Vvk. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'zvmguest,10.11.12.23' (ECDSA) to the list of known hosts. installer@zvmguest's password: Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-37-generic s390x) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/pro System information as of Fri Jun 26 11:08:18 UTC 2020 System load: 1.25 Memory usage: 4% Processes: 192 Usage of /home: unknown Swap usage: 0% Users logged in: 0 0 updates can be installed immediately. 0 of these updates are security updates. The list of available updates is more than a week old. To check for new updates run: sudo apt update The programs included with the Ubuntu system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. the installer running on /dev/tty1 will perform the autoinstall press enter to start a shell -
Please note that it informs you about a currently-running autoinstall process:
the installer running on /dev/tty1 will perform the autoinstall -
Nevertheless, we can quickly check some things – although, only until the autoinstall process is finished and the post-install reboot has been triggered:
root@ubuntu-server:/# ls -l /tmp/lets_activate_the_s390x_devices -rw-r--r-- 1 root root 0 Jun 26 11:08 /tmp/lets_activate_the_s390x_devices -rw-r--r-- 1 root root 0 Jun 26 11:09 /tmp/s390x_devices_activation_done root@ubuntu-server:/# lszdev | grep yes dasd-eckd 0.0.1f00 yes yes qeth 0.0.0600:0.0.0601:0.0.0602 yes no enc600 root@ubuntu-server:/# -
If you wait long enough, you’ll see that the remote session gets closed:
root@ubuntu-server:/# Connection to zvmguest closed by remote host. Connection to zvmguest closed. user@workstation:~$ -
As well as at the console:
ubuntu-server login: [[0;1;31mFAILED[0m] Failed unmounting [0;1;39m/cdrom[0m. [ 169.161139] sd-umoun[15600]: Failed to unmount /oldroot: Device or resource busy [ 169.161550] sd-umoun[15601]: Failed to unmount /oldroot/cdrom: Device or resource busy [ 169.168118] shutdown[1]: Failed to finalize file systems, loop devices, ignoring Total: 282 Selected: 0 Command: -
…and that the post-install reboot got triggered:
Message Mounting [0;1;39mKernel Configuration File System[0m... Starting [0;1;39mApply Kernel Variables[0m... [[0;32m OK [0m] Finished [0;1;39mRemount Root and Kernel File Systems[0m. [[0;32m OK [0m] Finished [0;1;39mUncomplicated firewall[0m. [[0;32m OK [0m] Mounted [0;1;39mFUSE Control File System[0m. [[0;32m OK [0m] Mounted [0;1;39mKernel Configuration File System[0m. ... [ 35.378928] cloud-init[2565]: Cloud-init v. 20.1-10-g71af48df-0ubuntu5 runnin g 'modules:final' at Fri, 26 Jun 2020 11:10:44 +0000. Up 35.29 seconds. [ 35.378978] cloud-init[2565]: Cloud-init v. 20.1-10-g71af48df-0ubuntu5 finish ed at Fri, 26 Jun 2020 11:10:44 +0000. Datasource DataSourceNone. Up 35.37 seconds [ 35.379008] cloud-init[2565]: 2020-06-26 11:10:44,359 - cc_final_message.py[W ARNING]: Used fallback datasource [[0;32m OK [0m] Finished [0;1;39mExecute cloud user/final scripts[0m. [[0;32m OK [0m] Reached target [0;1;39mCloud-init target[0m. zvmguest login: -
With the completion of the reboot the autoinstall is finished and the z/VM guest is ready to use:
user@workstation:~$ ssh-keygen -f "/home/user/.ssh/known_hosts" -R "zvmguest" # Host zvmguest found: line 163 /home/user/.ssh/known_hosts updated. Original contents retained as /home/user/.ssh/known_hosts.old user@workstation:~$ ssh ubuntu@zvmguest The authenticity of host 'zvmguest (10.11.12.23)' can't be established. ECDSA key fingerprint is SHA256:iGtCArEg+ZnoZlgtOkvmyy0gPY8UEI+f7zoISOF+m/0. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'zvmguest,10.11.12.23' (ECDSA) to the list of known hosts. Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-39-generic s390x) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/pro System information as of Fri 26 Jun 2020 11:12:23 AM UTC System load: 0.21 Memory usage: 3% Processes: 189 Usage of /: 28.2% of 30.88GB Swap usage: 0% Users logged in: 0 10 updates can be installed immediately. 0 of these updates are security updates. To see these additional updates run: apt list --upgradable The programs included with the Ubuntu system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. To run a command as administrator (user "root"), use "sudo <command>". See "man sudo_root" for details. ubuntu@zvmguest:~$ uptime 11:12:35 up 2 min, 1 user, load average: 0.18, 0.17, 0.08 ubuntu@zvmguest:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04 LTS Release: 20.04 Codename: focal ubuntu@zvmguest:~$ uname -a Linux zvmguest 5.4.0-39-generic #43-Ubuntu SMP Fri Jun 19 10:27:17 UTC 2020 s390x s390x s390x GNU/Linux ubuntu@zvmguest:~$ lszdev | grep yes dasd-eckd 0.0.1f00 yes yes qeth 0.0.0600:0.0.0601:0.0.0602 yes yes enc600 ubuntu@zvmguest:~$ exit logout Connection to zvmguest closed. user@workstation:~$
Some closing notes
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It’s always best to use the latest installer and autoinstall components: either make sure the installer gets updated to the latest level, or just use a current daily live-server image.
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The ISO image specified with the kernel parameters needs to fit in the boot folder. Its kernel and initrd are specified in the ‘Load from Removable Media and Server’ task at the hardware management console (HMC).
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In addition to activating disk storage resources in
early-commands, other devices like OSA/qeth can be added and activated there, too. This is not needed for the basic network device, as specified in the kernel parameters that are used for the installation (that one is automatically handled). -
If everything is properly set up – FTP server for the image, HTTP server for the autoinstall config files – the installation can be as quick as 2 to 3 minutes (depending on the complexity of the autoinstall YAML file).
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There is a simple way of generating a sample autoinstall YAML file: one can perform an interactive Subiquity installation, grab the file
/var/log/installer/autoinstall-user-data, and use it as an example – but beware that theearly-commandsentries to activate the s390x-specific devices need to be added manually!