docker 25 から 29 にアップグレードする方法

• 概要
• 環境
• 更新先のバージョンの確認
• ピン留めの修正
• 更新
• docker 再起動
• 確認
• 最後に

概要

ついに 25 が EOL になったのでアップグレード

環境

• Ubuntu 22.04

更新先のバージョンの確認

• apt -y update
• apt-cache policy docker-ce docker-ce-cli
• apt list --all-versions docker-ce | head -n 10

更新可能な最新バージョンをメモ

ピン留めの修正

• cp docker.pref docker.pref.back
• vim docker.pref

Explanation: Pin added by DevOps with GitLab
Package: docker-ce*
Pin: version 5:29.9.1-1~ubuntu.22.04~jammy
Pin-Priority: 600

更新

• apt install --dry-run docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
• apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

root@ubuntu:/etc/apt/preferences.d# apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
docker-buildx-plugin is already the newest version (0.38.0-1~ubuntu.22.04~jammy).
docker-buildx-plugin set to manually installed.
docker-compose-plugin is already the newest version (5.6.0-1~ubuntu.22.04~jammy).
docker-compose-plugin set to manually installed.
The following packages were automatically installed and are no longer required:
  libfwupd2 libfwupdplugin5 libgcab-1.0-0 libgusb2 libltdl7 libmbim-glib4 libmbim-proxy libmm-glib0 libqmi-glib5 libqmi-proxy libsmbios-c2 libtcl8.6 modemmanager
  tcl tcl8.6 usb-modeswitch usb-modeswitch-data
Use 'apt autoremove' to remove them.
Suggested packages:
  cgroupfs-mount | cgroup-lite docker-model-plugin
The following packages will be upgraded:
  containerd.io docker-ce docker-ce-cli
3 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
Need to get 65.4 MB of archives.
After this operation, 22.6 MB of additional disk space will be used.
N: Ignoring file 'docker.pref.back' in directory '/etc/apt/preferences.d/' as it has an invalid filename extension
Do you want to continue? [Y/n] Y
Get:1 https://download.docker.com/linux/ubuntu jammy/stable amd64 docker-ce-cli amd64 5:29.9.1-1~ubuntu.22.04~jammy [17.6 MB]
Get:2 https://download.docker.com/linux/ubuntu jammy/stable amd64 containerd.io amd64 2.4.2-2~ubuntu.22.04~jammy [23.3 MB]
Get:3 https://download.docker.com/linux/ubuntu jammy/stable amd64 docker-ce amd64 5:29.9.1-1~ubuntu.22.04~jammy [24.6 MB]
Fetched 65.4 MB in 1s (48.8 MB/s)
(Reading database ... 109872 files and directories currently installed.)
Preparing to unpack .../docker-ce-cli_5%3a29.9.1-1~ubuntu.22.04~jammy_amd64.deb ...
Unpacking docker-ce-cli (5:29.9.1-1~ubuntu.22.04~jammy) over (5:25.0.5-1~ubuntu.22.04~jammy) ...
Preparing to unpack .../containerd.io_2.4.2-2~ubuntu.22.04~jammy_amd64.deb ...
Unpacking containerd.io (2.4.2-2~ubuntu.22.04~jammy) over (2.4.1-2~ubuntu.22.04~jammy) ...
Preparing to unpack .../docker-ce_5%3a29.9.1-1~ubuntu.22.04~jammy_amd64.deb ...
Unpacking docker-ce (5:29.9.1-1~ubuntu.22.04~jammy) over (5:25.0.5-1~ubuntu.22.04~jammy) ...
Setting up containerd.io (2.4.2-2~ubuntu.22.04~jammy) ...
/usr/sbin/policy-rc.d returned 101, not running 'restart containerd.service'
Setting up docker-ce-cli (5:29.9.1-1~ubuntu.22.04~jammy) ...
Setting up docker-ce (5:29.9.1-1~ubuntu.22.04~jammy) ...
invoke-rc.d: policy-rc.d denied execution of restart.
/usr/sbin/policy-rc.d returned 101, not running 'restart docker.service docker.socket'
Processing triggers for man-db (2.10.2-1) ...
Scanning processes...
Scanning candidates...
Scanning linux images...

Running kernel seems to be up-to-date.

Restarting services...
 systemctl restart fwupd.service irqbalance.service multipathd.service open-vm-tools.service packagekit.service polkit.service rsyslog.service ssh.service systemd-timesyncd.service systemd-udevd.service udisks2.service unbound.service upower.service
Service restarts being deferred:
 systemctl restart ModemManager.service
 systemctl restart containerd.service
 /etc/needrestart/restart.d/dbus.service
 systemctl restart docker.service
 systemctl restart networkd-dispatcher.service
 systemctl restart systemd-logind.service
 systemctl restart unattended-upgrades.service

No containers need to be restarted.

No user sessions are running outdated binaries.

No VM guests are running outdated hypervisor (qemu) binaries on this host.

docker 再起動

• systemctl restart containerd.service
• systemctl restart docker.service

確認

• docker version

Client: Docker Engine - Community
 Version:           29.9.1
 API version:       1.56
 Go version:        go1.26.9
 Git commit:        dfc520d
 Built:             Wed Oct 14 18:32:26 2026
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          29.9.1
  API version:      1.56 (minimum version 1.40)
  Go version:       go1.26.9
  Git commit:       b26fb77
  Built:            Wed Oct 14 18:32:26 2026
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v2.4.2
  GitCommit:        b7a25261e029d68978bbf290df0a62fc819b3c51
 runc:
  Version:          1.5.2
  GitCommit:        v1.5.2-0-g29dd3dc2
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

最後に

今回は Docker CE のバージョンを APT preferences で指定しています。次回以降に更新する場合は、リポジトリの更新候補を確認し、必要に応じてピン留め設定を変更します。

Docker 公式リポジトリは unattended-upgrades の対象にしていないため、自動更新は行われません。