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更新一个比较有年头的服务的系统上的 docker-compose 使用了一个旧的脚本
sudo tee /etc/apt/sources.list.d/docker.list <<EOF
deb [arch=amd64] http://mirrors.com/docker-ce/linux/ubuntu focal stable
# deb-src [arch=amd64] http://mirrors.com/docker-ce/linux/ubuntu focal stable
EOF
由此导致 docker-ce 安装失败
# apt remove -y docker-ce
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
aufs-tools cgroupfs-mount docker-ce-rootless-extras pigz
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
docker-ce
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 104 MB disk space will be freed.
(Reading database ... 107327 files and directories currently installed.)
Removing docker-ce (5:25.0.4-1~ubuntu.20.04~focal) ...
invoke-rc.d: syntax error: unknown option "--skip-systemd-native"
dpkg: error processing package docker-ce (--remove):
subprocess installed pre-removal script returned error exit status 1
dpkg: error while cleaning up:
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
docker-ce
E: Sub-process /usr/bin/dpkg returned an error code (1)
找一些方案，也进行了些尝试, 比如
dpkg --purge --force-all docker-ce
apt install --reinstall init-system-helpers
仔细看了下报错信息
invoke-rc.d: syntax error: unknown option "--skip-systemd-native"
分析是新版本的 docker 卸载脚本中使用了一当前版本 invoke-rc.d 不支持的参数 "--skip-systemd-native"，
于是尝试 grep -r skip-systemd-native / 一直到问题解决都没出结果。
再寻找 apt post scripts 的位置， 从这里 找到这个目录 /var/lib/dpkg/info/
在这个目录找到与 docker 有关的文件
docker-buildx-plugin.list
docker-buildx-plugin.md5sums
docker-ce-cli.list
docker-ce-cli.md5sums
docker-ce.conffiles
docker-ce.list
docker-ce.md5sums
docker-ce.postinst
docker-ce.postrm
docker-ce.preinst
docker-ce.prerm
docker-ce-rootless-extras.list
docker-ce-rootless-extras.md5sums
先看了 docker-ce.postrm 没有找到这个参数，继续看 docker-ce.prerm，找到这个参数，修改这个文件，备份该行，删除 "--skip-systemd-native"
执行
apt remove -y docker-ce
成功删除