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Fix disk resize issue for Centos VMs #78

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Fix disk resize issue for Centos VMs #78

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27 changes: 27 additions & 0 deletions hack/scripts/expand-root-volume.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
#!/bin/bash
set -x

# 1. Rescan physical paths
for dev in /sys/block/sd*/device/rescan; do echo 1 > "$dev"; done
sleep 2

# 2. Resize Multipath Map
multipathd -k"resize map mpatha"
sleep 2

# 3. Handle GPT 'Fix' separately and silently
# We pipe 'Fix' to a print command. If there's no error, Fix is ignored.
printf "Fix\n" | parted /dev/mapper/mpatha ---pretend-input-tty print > /dev/null 2>&1

# 4. Resize the partition
printf "Yes\n" | parted /dev/mapper/mpatha ---pretend-input-tty resizepart 2 100%

# 5. Refresh mappings
kpartx -u /dev/mapper/mpatha
udevadm settle

# 6. Grow Filesystem
xfs_growfs /

# 7. Flag completion
touch /var/lib/pac-root-expanded
25 changes: 23 additions & 2 deletions hack/scripts/image-prep.template.static
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ subscription-manager register --force --auto-attach --username={{ .RHNUser }} --

yum update -y && yum install -y yum-utils
yum install -y cloud-init firewalld
yum install -y device-mapper-multipath parted kpartx
rm -rf /etc/systemd/system/multi-user.target.wants/firewalld.service
rpm -vih --nodeps https://public.dhe.ibm.com/software/server/POWER/Linux/yum/download/ibm-power-repo-latest.noarch.rpm
sed -i 's/^more \/opt\/ibm\/lop\/notice/#more \/opt\/ibm\/lop\/notice/g' /opt/ibm/lop/configure
Expand Down Expand Up @@ -56,13 +57,32 @@ done
grub2-mkconfig -o /boot/grub2/grub.cfg

curl https://raw.githubusercontent.com/IBM/power-access-cloud/refs/heads/main/hack/scripts/prep-pac.sh -o /usr/local/bin/prep-pac.sh
curl https://raw.githubusercontent.com/IBM/power-access-cloud/refs/heads/main/hack/scripts/expand-root-volume.sh -o /usr/local/bin/expand-root-volume.sh
chmod +x /usr/local/bin/prep-pac.sh
chmod +x /usr/local/bin/expand-root-volume.sh

cat <<EOT >> /usr/lib/systemd/system/expand-root-volume.service
[Unit]
Description=Expand multipath root volume on first boot
DefaultDependencies=no
After=local-fs.target systemd-udev-settle.service multipathd.service
Before=prep-pac.service cloud-final.service
ConditionPathExists=!/var/lib/pac-root-expanded

[Service]
ExecStart=/usr/local/bin/expand-root-volume.sh
Type=oneshot
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target
EOT

cat <<EOT >> /usr/lib/systemd/system/prep-pac.service
[Unit]
Description=Prepare the machine for the Power Access Cloud
Requires=cloud-final.service
After=cloud-final.service
Requires=cloud-final.service expand-root-volume.service
After=cloud-final.service expand-root-volume.service

[Service]
ExecStart=/usr/local/bin/prep-pac.sh
Expand All @@ -75,6 +95,7 @@ RemainAfterExit=yes
WantedBy=cloud-init.target
EOT

systemctl enable expand-root-volume.service
systemctl enable prep-pac.service
#mkdir -p /etc/cloud/cloud.cfg.d
#cat <<EOT >> /etc/cloud/cloud.cfg.d/99-custom-networking.cfg
Expand Down
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