DPM Nova image creation docs
This describes the process to create an OpenStack image for the IBM System z PRSM hypervisor in DPM mode. closes-Bug: 1657719 Change-Id: Icc65fcbafc4889e3f147bae9cfadfc8890439fc4
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sreeteja
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[Unit]
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Description=Initial cloud-init job (pre-networking)
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#DefaultDependencies=no
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Wants=network-pre.target
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After=systemd-remount-fs.service
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Before=NetworkManager.service
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Before=network-pre.target
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Before=shutdown.target
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#Before=sysinit.target
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Conflicts=shutdown.target
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RequiresMountsFor=/var/lib/cloud
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[Service]
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Type=oneshot
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ExecStart=/usr/bin/cloud-init init --local
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ExecStart=/bin/touch /run/cloud-init/network-config-ready
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RemainAfterExit=yes
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TimeoutSec=0
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# Output needs to appear in instance console output
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StandardOutput=journal+console
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[Install]
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WantedBy=cloud-init.target
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[Unit]
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Description=Initial cloud-init job (metadata service crawler)
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#DefaultDependencies=no
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Wants=cloud-init-local.service
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Wants=sshd-keygen.service
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Wants=sshd.service
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After=cloud-init-local.service
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After=networking.service
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After=systemd-hostnamed.service
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Before=network-online.target
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Before=sshd-keygen.service
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Before=sshd.service
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#Before=sysinit.target
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Before=systemd-user-sessions.service
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Conflicts=shutdown.target
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[Service]
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Type=oneshot
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ExecStart=/usr/bin/cloud-init init
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RemainAfterExit=yes
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TimeoutSec=0
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# Output needs to appear in instance console output
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StandardOutput=journal+console
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[Install]
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WantedBy=cloud-init.target
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# The top level settings are used as module
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# and system configuration.
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# A set of users which may be applied and/or used by various modules
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# when a 'default' entry is found it will reference the 'default_user'
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# from the distro configuration specified below
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users:
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- default
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# If this is set, 'root' will not be able to ssh in and they
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# will get a message to login instead as the above $user (ubuntu)
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disable_root: false
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# This will cause the set+update hostname module to not operate (if true)
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preserve_hostname: false
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#datasource_list: [ ConfigDrive, None ]
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# Example datasource config
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# datasource:
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# Ec2:
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# metadata_urls: [ 'blah.com' ]
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# timeout: 5 # (defaults to 50 seconds)
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# max_wait: 10 # (defaults to 120 seconds)
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# The modules that run in the 'init' stage
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cloud_init_modules:
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- migrator
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# - ubuntu-init-switch
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- seed_random
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- bootcmd
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- write-files
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- growpart
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- resizefs
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- disk_setup
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- mounts
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- set_hostname
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- update_hostname
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- update_etc_hosts
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- ca-certs
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- rsyslog
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- users-groups
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- ssh
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# The modules that run in the 'config' stage
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cloud_config_modules:
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# Emit the cloud config ready event
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# this can be used by upstart jobs for 'start on cloud-config'.
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- emit_upstart
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- snap_config
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- ssh-import-id
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- locale
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- set-passwords
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# - grub-dpkg
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# - apt-pipelining
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# - apt-configure
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- ntp
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- timezone
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- disable-ec2-metadata
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- runcmd
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- byobu
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# The modules that run in the 'final' stage
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cloud_final_modules:
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- snappy
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- package-update-upgrade-install
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- fan
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- landscape
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- lxd
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- puppet
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- chef
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- salt-minion
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- mcollective
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- rightscale_userdata
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- scripts-vendor
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- scripts-per-once
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- scripts-per-boot
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- scripts-per-instance
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- scripts-user
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- ssh-authkey-fingerprints
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- keys-to-console
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- phone-home
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- final-message
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- power-state-change
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# System and/or distro specific settings
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# (not accessible to handlers/transforms)
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system_info:
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# This will affect which distro class gets used
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distro: rhel
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=================================
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Creating a qcow2 image for RHEL
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=================================
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This section explains the qcow2 image creation for RHEL.
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Precondition
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------------
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Partition with RHEL-7.3 installed and root user access
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Update boot loader
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------------------
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#. Go to `/etc/zipl.conf` and remove all occurrences of `rd.zfcp=`
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#. Add a new rd.zfcp entry
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`rd.zfcp=ipldev`
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#. Empty /etc/zfcp.conf file
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`echo "" > /etc/zfcp.conf`
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#. Create the dasd.conf file # In order to avoid error messages related to dasd configuration
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`touch /etc/dasd.conf`
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#. Go to `/usr/lib/dracut/modules.d/95zfcp/parse-zfcp.sh`
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Apply the following differences:
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::
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$ diff old_parse-zfcp.sh new_parse-zfcp.sh
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8,9c8,10 < echo $zfcp_arg | grep '0\.[0-9a-fA-F]\.[0-9a-fA-F]\{4\},0x[0-9a-fA-F]\{16\},0x[0-9a-fA-F]\{16\}' >/dev/null
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< test $? -ne 0 && die "For argument 'rd.zfcp=$zfcp_arg'\nSorry, invalid format."
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--- > if [ "$zfcp_arg" == "ipldev" -a "$(cat /sys/firmware/ipl/ipl_type)" == "fcp" ] ; then
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> zfcp_arg="$(cat /sys/firmware/ipl/device),$(cat /sys/firmware/ipl/wwpn),$(cat /sys/firmware/ipl/lun)"
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> fi
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The result should look like this:
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::
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#!/bin/sh
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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# ex: ts=8 sw=4 sts=4 et filetype=sh
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getargbool 1 rd.zfcp.conf -d -n rd_NO_ZFCPCONF || rm /etc/zfcp.conf
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for zfcp_arg in $(getargs rd.zfcp -d 'rd_ZFCP='); do
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if [ "$zfcp_arg" == "ipldev" -a "$(cat /sys/firmware/ipl/ipl_type)" == "fcp" ] ; then
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zfcp_arg="$(cat /sys/firmware/ipl/device),$(cat /sys/firmware/ipl/wwpn),$(cat /sys/firmware/ipl/lun)"
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fi
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(
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IFS=","
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set $zfcp_arg
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echo "$@" >> /etc/zfcp.conf
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)
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done
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zfcp_cio_free
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#. Rebuild the ramdisk
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`dracut -f`
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#. To apply the above changes to the contents of boot loader script
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`zipl -V`
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Installation of Cloud-init
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--------------------------
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Add the RHEL7.3 yum repository
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+++++++++++++++++++++++++++++++
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* Add the yum repository file that points to a network resource
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::
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cat <<EOT > /etc/yum.repos.d/rhel.repo
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[RHEL7.3]
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name=Red Hat Enterprise Linux Repository
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baseurl=https://x.x.x.x
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enabled=1
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gpgcheck=0
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EOT
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Install cloud-init 0.7.9
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++++++++++++++++++++++++
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Download latest cloud-init from https://launchpad.net/cloud-init/+download
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* Install python setuptools
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`yum install python-setuptools`
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* Extract it
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`tar -xf cloud-init-0.7.9.tar.gz`
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* Enter the extracted directory
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`cd cloud-init-0.7.9`
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* Build and install it:
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`python setup.py build`
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`python setup.py install --init-system systemd`
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Update cloud-init service files
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+++++++++++++++++++++++++++++++
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* Remove Default dependencies
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::
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sed -i '/^\[Unit\]$/,/^\[/ s/^DefaultDependencies=no/#DefaultDependencies=no/' /usr/lib/systemd/system/cloud-init.service
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sed -i '/^\[Unit\]$/,/^\[/ s/^DefaultDependencies=no/#DefaultDependencies=no/' /usr/lib/systemd/system/cloud-init-local.service
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* Remove ordering for sysinit.target
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::
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sed -i '/^\[Unit\]$/,/^\[/ s/^Before=sysinit.target/#Before=sysinit.target/' /usr/lib/systemd/system/cloud-init.service
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sed -i '/^\[Unit\]$/,/^\[/ s/^Before=sysinit.target/#Before=sysinit.target/' /usr/lib/systemd/system/cloud-init-local.service
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* order with systemd-hostnamed.service
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::
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sed -i '/^\[Unit\]$/,/^\[/ s/^After=networking.service/After=networking.service\nAfter=systemd-hostnamed.service/' /usr/lib/systemd/system/cloud-init.service
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The result should look like this:
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cat /usr/lib/systemd/system/cloud-init.service
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.. include:: cloud-init.service
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:literal:
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cat /usr/lib/systemd/system/cloud-init-local.service
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.. include:: cloud-init-local.service
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:literal:
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Configure cloud-init for autostart
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++++++++++++++++++++++++++++++++++
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`systemctl daemon-reload`
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`systemctl enable cloud-init.service`
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`systemctl enable cloud-init-local.service`
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`systemctl enable cloud-final.service`
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`systemctl enable cloud-config.service`
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Use the following cloud.cfg file
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++++++++++++++++++++++++++++++++
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* Keep this cloud.cfg file in /etc/cloud/
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.. include:: cloud.cfg
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:literal:
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Test-It
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+++++++
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Run it once to see if things are working
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`cloud-init --init`
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.. note::
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This might take a few minutes, as cloud-init tries to access various network datasources, which
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probably are not available in your image build environment.But they should be available in your
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OpenStack cloud. For debugging you might need to set "datasource_list: [ ConfigDrive, None ]" in cloud.cfg.
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This excludes those network data sources and boot is pretty fast.
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Add DPM-Guest Tools
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--------------------
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* Install `git` and clone nova-dpm_ repository into the guest image.
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`git clone https://github.com/openstack/nova-dpm.git`
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* Copy the following files from nova-dpm directory into the guest image
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::
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cp nova-dpm/dpm_guest_tools/usr/bin/autoconfigure_networking.sh /usr/bin/autoconfigure_networking.sh
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cp nova-dpm/dpm_guest_tools/usr/lib/systemd/system/autoconfigure_networking.service /usr/lib/systemd/system/autoconfigure_networking.service
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cp nova-dpm/dpm_guest_tools/usr/bin/setmac.sh /usr/bin/setmac.sh
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cp nova-dpm/dpm_guest_tools/etc/udev/rules.d/80-setmac.rules /etc/udev/rules.d/80-setmac.rules
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* Ensure permissions
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`chmod 644 /usr/lib/systemd/system/autoconfigure_networking.service`
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* Enable the service for autostart
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`systemctl enable autoconfigure_networking.service`
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Cleanup
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-------
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* Cleanup logs and journalctl
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`rm -rf /var/log/*`
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* Remove repo file and update repo
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`rm -f /etc/yum.repos.d/rhel.repo`
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`yum clean all`
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`yum update`
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`yum repolist`
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* Remove data from last cloud-init run
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`rm -rf /var/lib/cloud/*`
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* Remove persistent mac address interface mappings
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`rm -f /etc/udev/rules.d/70-persistent-net.rules`
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* Remove persistent network configs
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`rm -f /etc/sysconfig/network-scripts/ifcfg-enc*`
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* Clear /etc/hostname
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`echo "" > /etc/hostname`
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* Cleanup home directory
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`rm -rf ~/*`
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Create qcow2 image
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------------------
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* In order to nullify space
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`dd if=/dev/zero of=~/tmpfile`
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`rm -rf ~/tmpfile`
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* Now stop the partition and access the LUN used for image creation from other machine
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* copy disk content byte-by-byte into a raw image
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`dd status=progress if=/path/to/installed/lun of=RHEL.img`
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* Convert this raw image to qcow
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`qemu-img convert -f raw -O qcow2 RHEL.img RHEL.qcow`
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Test qcow2 image
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----------------
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* Deploy this image on another LUN
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`qemu-img convert RHEL.qcow /path/to/new/lun`
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* Use this new LUN to boot the machine
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.. _nova-dpm: https://github.com/openstack/nova-dpm.git
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@ -62,6 +62,16 @@ Using the driver
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installation
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configuration
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Creating DPM Images
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===================
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.. toctree::
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:maxdepth: 2
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image/rhel7/rhel7_image
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Contributing to the project
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===========================
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@ -72,6 +82,8 @@ Contributing to the project
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devref
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specs/ocata/index
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Links
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=====
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