docs(runbooks): fleet guest patch campaign 2026-10-05 (park 100); fv-ml1 docker-to-tank one-off

2026-10-05 01:50:55 -07:00
parent 7346e4623c
commit bf46beaa96
2 changed files with 179 additions and 0 deletions
@@ -0,0 +1,90 @@
+#!/bin/bash
+# One-off, 2026-10-05 (Prime, park 99): move fv-ml1's Docker data off the root SSD mirror (zroot) onto tank,
+# and patch the host in the same window so the model seats bounce once, not twice.
+#
+#   scp this to fv-ml1, then: sudo systemd-run --unit=docker-move --collect /root/fv-ml1-docker-to-tank.sh
+#   progress: /var/log/docker-move-20261005.log
+#
+# Shape: a sparse 1 TiB zvol tank/docker, ext4, mounted AT /var/lib/docker (fstab, nofail, after
+# zfs-volume-wait). The path does not change, so nothing that names /var/lib/docker (restic, volumes, compose)
+# needs editing. Why a zvol and not a dataset: Docker's overlay2 driver refuses a ZFS backing filesystem, and an
+# unpinned daemon would silently pick the zfs graph driver and lose every image. ext4 under overlay2 is the
+# canonical setup. docker.service gets RequiresMountsFor=/var/lib/docker, so if the zvol is ever missing at boot
+# docker stays down instead of starting fresh on an empty root directory.
+#
+# Patching: everything except the packages that could take the box or its GPUs down at the next boot, which are
+# held and parked for Prime: the ZFS stack (2.3.2 -> 2.3.9 rebuilds the module root is mounted with) and
+# nvidia-container-toolkit (the GPU hook every seat starts through). No reboot.
+#
+# The old tree stays at /var/lib/docker.old-zroot until the seats are verified; deleting it is a separate,
+# literal-path step.
+set -euo pipefail
+exec > >(tee -a /var/log/docker-move-20261005.log) 2>&1
+step() { echo; echo "=== $(date +%H:%M:%S) $*"; }
+
+step "pre-state"
+docker ps --format '{{.Names}}' | sort > /root/docker-move-running-before.txt
+cat /root/docker-move-running-before.txt | tr '\n' ' '; echo
+df -h / /tank | cat
+
+step "zvol tank/docker (sparse 1T) + ext4"
+zfs list tank/docker >/dev/null 2>&1 || zfs create -s -V 1T tank/docker
+udevadm settle
+for i in $(seq 1 30); do [ -e /dev/zvol/tank/docker ] && break; sleep 1; done
+test -e /dev/zvol/tank/docker
+blkid /dev/zvol/tank/docker >/dev/null 2>&1 || mkfs.ext4 -q -L docker -E lazy_itable_init=1,lazy_journal_init=1 /dev/zvol/tank/docker
+mkdir -p /mnt/docker-new
+mountpoint -q /mnt/docker-new || mount /dev/zvol/tank/docker /mnt/docker-new
+
+step "pass 1 (live copy)"
+rsync -aHAXS --numeric-ids /var/lib/docker/ /mnt/docker-new/
+
+step "stop docker"
+systemctl stop docker.socket docker.service
+sleep 2
+if pgrep -x dockerd >/dev/null; then echo 'dockerd still running, abort before the final pass'; exit 1; fi
+
+step "pass 2 (final, --delete)"
+rsync -aHAXS --numeric-ids --delete /var/lib/docker/ /mnt/docker-new/
+a=$(find /var/lib/docker -xdev | wc -l); b=$(find /mnt/docker-new -xdev | wc -l)
+echo "entries: old=$a new=$b"
+# lost+found exists only on the new ext4, so new = old + 1
+test "$((b - a))" -eq 1 || { echo 'entry count mismatch, abort (docker is stopped, old tree untouched)'; exit 1; }
+
+step "swap: old tree aside, zvol mounted at /var/lib/docker"
+umount /mnt/docker-new
+mv /var/lib/docker /var/lib/docker.old-zroot
+install -d -m 710 /var/lib/docker
+grep -q '^/dev/zvol/tank/docker ' /etc/fstab || \
+  echo '/dev/zvol/tank/docker /var/lib/docker ext4 defaults,nofail,x-systemd.requires=zfs-volume-wait.service,x-systemd.after=zfs-volume-wait.service 0 2' >> /etc/fstab
+install -d /etc/systemd/system/docker.service.d
+printf '[Unit]\n# /var/lib/docker is the tank/docker zvol (2026-10-05). Never start on an empty root dir.\nRequiresMountsFor=/var/lib/docker\n' \
+  > /etc/systemd/system/docker.service.d/10-requires-docker-mount.conf
+systemctl daemon-reload
+mount /var/lib/docker
+findmnt -no SOURCE,FSTYPE /var/lib/docker
+
+step "patch (holds: ZFS stack, nvidia-container-toolkit)"
+apt-mark hold zfs-dkms zfsutils-linux zfs-zed zfs-initramfs libzfs6linux libzpool6linux libnvpair3linux libuutil3linux \
+  nvidia-container-toolkit nvidia-container-toolkit-base libnvidia-container-tools libnvidia-container1 2>&1 | tail -3 || true
+DEBIAN_FRONTEND=noninteractive NEEDRESTART_MODE=l apt-get -q -y -o Dpkg::Options::=--force-confold upgrade --with-new-pkgs
+echo "still upgradable (held/kept back):"; apt list --upgradable 2>/dev/null | tail -n +2 | cut -d/ -f1 | tr '\n' ' '; echo
+test -f /var/run/reboot-required && echo "REBOOT REQUIRED (deferred): $(cat /var/run/reboot-required.pkgs 2>/dev/null | tr '\n' ' ')"
+
+step "start docker"
+systemctl start docker.service
+docker info --format 'root={{.DockerRootDir}} driver={{.Driver}} ver={{.ServerVersion}} images={{.Images}}'
+
+step "wait for the same containers to be running + healthy (up to 25 min)"
+for i in $(seq 1 150); do
+  docker ps --format '{{.Names}}' | sort > /root/docker-move-running-after.txt
+  missing=$(comm -23 /root/docker-move-running-before.txt /root/docker-move-running-after.txt | tr '\n' ' ')
+  # `|| true`: grep finding nothing is the SUCCESS case here, and set -e would kill the script on it
+  starting=$(docker ps --format '{{.Names}} {{.Status}}' | grep -E 'health: starting|unhealthy' | cut -d' ' -f1 | tr '\n' ' ' || true)
+  [ -z "$missing" ] && [ -z "$starting" ] && break
+  sleep 10
+done
+echo "missing: ${missing:-none}"; echo "starting/unhealthy: ${starting:-none}"
+docker ps --format '{{.Names}}|{{.Status}}' | cat
+df -h / /var/lib/docker | cat
+step "done"