mirror of
https://github.com/mulgadc/spinifex.git
synced 2026-10-15 17:11:30 +00:00
Julian Sommer
61 lines
2.9 KiB
Bash
61 lines
2.9 KiB
Bash
#!/bin/sh
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set -eu
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# setup.sh — guest customisation for the spinifex-rds-postgres AMI. Runs inside
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# the libguestfs appliance under build-system-image.sh, after packages and
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# INSTALL_FILES are placed.
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# INSTALL_FILES land 0644; OpenRC requires 0755 on init scripts, and rds-init
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# and rds-datadir are executed directly by their services.
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chmod 0755 /etc/init.d/rds-datadir /etc/init.d/rds-init /etc/init.d/rds-agent \
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/usr/local/sbin/rds-datadir /usr/local/sbin/rds-init
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chmod 0755 /etc/init.d/mulga-mgmt-net /etc/init.d/mulga-mgmt-net-routes \
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/usr/local/sbin/mulga-mgmt-net
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# mulga-mgmt-net goes in the boot runlevel, not default (where ENABLE_SERVICES
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# lands services). It applies mgmt0's static address, which rds-agent needs to
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# reach the gateway at all, and DHCPs the data NIC so the init-local Ec2 crawl
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# reaches IMDS; a default entry runs after cloud-init-local and is too late.
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rc-update add mulga-mgmt-net boot
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# Where cloud-init drops the agent's env file and the gateway CA. Created here
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# so the delivery lands in a root-only directory.
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install -d -m 0700 /etc/spinifex-rds
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# The engine this image bakes. rds-agent builds its engine implementation from
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# this file, so running the wrong implementation is structurally impossible
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# rather than merely validated against; a VM launched as another engine is
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# refused before anything touches the datadir.
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printf 'postgres\n' > /etc/spinifex-rds/engine
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chmod 0444 /etc/spinifex-rds/engine
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# Empty in the image: rds-datadir mounts over it at boot. Postgres-owned so the
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# engine can traverse it if the volume's own root is stricter.
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install -d -m 0750 -o postgres -g postgres /var/lib/postgresql
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# Kept on the boot volume: per-boot diagnostics, so a snapshot stays data-only.
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install -d -m 0755 -o postgres -g postgres /var/log/postgresql
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# INSTALL_FILES replaces the stock conf.d wholesale; assert auto-setup is really
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# off, since an image that can silently initdb over a missing data volume is the
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# one failure this image must not have.
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grep -q '^auto_setup="no"' /etc/conf.d/postgresql || {
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echo "[rds-postgres-setup] /etc/conf.d/postgresql does not disable auto_setup"
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exit 1
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}
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# Bind /dev/console to the serial port so userspace boot output reaches ttyS0,
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# which the orchestrator captures host-side. Linux makes the last console= the
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# controlling one, and stock Alpine lists tty0 last — reorder so ttyS0 wins.
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sed -i \
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's|console=ttyS0,115200n8 console=ttyAMA0,115200n8 console=tty0|console=tty0 console=ttyAMA0,115200n8 console=ttyS0,115200n8|' \
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/etc/update-extlinux.conf /boot/extlinux.conf
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# Cut the boot-menu countdown from 10s to ~1s, a fixed tax on every VM start.
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# Both the generator config (seconds) and the rendered output (1/10s) are patched
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# so a regenerate keeps it; a small nonzero keeps the menu interruptible.
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sed -i 's/^timeout=.*/timeout=1/' /etc/update-extlinux.conf
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sed -i 's/^TIMEOUT[[:space:]].*/TIMEOUT 10/' /boot/extlinux.conf
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echo "[rds-postgres-setup] done"
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