N0r*_*ert 7 lxc cgroup docker lxd 16.04
我安装了 Ubuntu 16.04.6 LTS。
之前我已经从其存储库将 Docker 安装为docker.io包。
昨天我用 LXD 安装了 LXC，我想它们与 Docker 共存存在一些问题。
LXC正常工作：
Run Code Online (Sandbox Code Playgroud)$ lxc exec ubuntu-test -- su --login ubuntu-test ~ #
现在，当我尝试启动 docker 容器时，docker run出现错误：
Run Code Online (Sandbox Code Playgroud)docker: Error response from daemon: cgroups: cannot find cgroup mount destination: unknown.
如何通过启动 Docker 容器来解决此问题？
如果可能，请建议同时安装 Docker 和 LXC/LXD 的解决方案。
一些调试信息：
$ mount | grep cgroup
tmpfs on /sys/fs/cgroup type tmpfs (rw,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,clone_children)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids,release_agent=/run/cgmanager/agents/cgm-release-agent.pids)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb)
$ dpkg -l | grep -E "containerd|docker|lxc|lxd|cgroup"
ii cgmanager 0.39-2ubuntu5 amd64 Central cgroup manager daemon
ii cgroup-lite 1.11 all Light-weight package to set up cgroups at system boot
ii containerd 1.2.6-0ubuntu1~16.04.3 amd64 daemon to control runC
ii docker.io 18.09.7-0ubuntu1~16.04.5 amd64 Linux container runtime
ii libcgmanager0:amd64 0.39-2ubuntu5 amd64 Central cgroup manager daemon (client library)
ii liblxc1 2.0.11-0ubuntu1~16.04.3 amd64 Linux Containers userspace tools (library)
ii libpam-cgfs 2.0.8-0ubuntu1~16.04.2 amd64 PAM module for managing cgroups for LXC
ii lxc-common 2.0.11-0ubuntu1~16.04.3 amd64 Linux Containers userspace tools (common tools)
ii lxc-templates 2.0.11-0ubuntu1~16.04.3 amd64 Linux Containers userspace tools (templates)
ii lxc1 2.0.11-0ubuntu1~16.04.3 amd64 Linux Containers userspace tools
ii lxcfs 2.0.8-0ubuntu1~16.04.2 amd64 FUSE based filesystem for LXC
ii lxd 2.0.11-0ubuntu1~16.04.4 amd64 Container hypervisor based on LXC - daemon
ii lxd-client 2.0.11-0ubuntu1~16.04.4 amd64 Container hypervisor based on LXC - client
ii python3-lxc 2.0.11-0ubuntu1~16.04.3 amd64 Linux Containers userspace tools (Python 3.x bindings)
$ systemctl list-units --type service
UNIT LOAD ACTIVE SUB JOB DESCRIPTION
accounts-daemon.service loaded active running Accounts Service
acpid.service loaded active running ACPI event daemon
alsa-restore.service loaded active exited Save/Restore Sound Card State
apparmor.service loaded active exited LSB: AppArmor initialization
apport.service loaded active exited LSB: automatic crash report generation
atd.service loaded active running Deferred execution scheduler
avahi-daemon.service loaded active running Avahi mDNS/DNS-SD Stack
avahi-dnsconfd.service loaded active running Avahi DNS Configuration Daemon
binfmt-support.service loaded active exited Enable support for additional executable binary formats
bluetooth.service loaded active running Bluetooth service
cgmanager.service loaded active running Cgroup management daemon
cgroupfs-mount.service loaded active exited LSB: Set up cgroupfs mounts.
click-system-hooks.service loaded active exited Run Click system-level hooks
colord.service loaded active running Manage, Install and Generate Color Profiles
console-kit-daemon.service loaded active running Console Manager
console-kit-log-system-start.service loaded active exited Console System Startup Logging
console-setup.service loaded active exited Set console font and keymap
containerd.service loaded active running containerd container runtime
cpufrequtils.service loaded active exited LSB: set CPUFreq kernel parameters
cron.service loaded active running Regular background program processing daemon
cups-browsed.service loaded active running Make remote CUPS printers available locally
cups.service loaded active running CUPS Scheduler
dbus.service loaded active running D-Bus System Message Bus
docker.service loaded inactive dead start Docker Application Container Engine
ebtables.service loaded active exited LSB: ebtables ruleset management
getty@tty1.service loaded inactive dead start Getty on tty1
gpm.service loaded active running LSB: gpm sysv init script
gpsd.service loaded active running GPS (Global Positioning System) Daemon
grub-common.service loaded active exited LSB: Record successful boot for GRUB
hddtemp.service loaded inactive dead start LSB: disk temperature monitoring daemon
iio-sensor-proxy.service loaded active running IIO Sensor Proxy service
inetd.service loaded active running Internet superserver
irqbalance.service loaded active running LSB: daemon to balance interrupts for SMP systems
keyboard-setup.service loaded active exited Set console keymap
kmod-static-nodes.service loaded active exited Create list of required static device nodes for the curre
libvirt-bin.service loaded active running Virtualization daemon
libvirt-guests.service loaded active exited Suspend Active Libvirt Guests
lightdm.service loaded active running Light Display Manager
lm-sensors.service loaded active exited Initialize hardware monitoring sensors
loadcpufreq.service loaded active exited LSB: Load kernel modules needed to enable cpufreq scaling
lvm2-lvmetad.service loaded active running LVM2 metadata daemon
lvm2-monitor.service loaded active exited Monitoring of LVM2 mirrors, snapshots etc. using dmeventd
lxc-net.service loaded inactive dead start LXC network bridge setup
lxc.service loaded inactive dead start LXC Container Initialization and Autoboot Code
lxcfs.service loaded active running FUSE filesystem for LXC
lxd-bridge.service loaded active exited LXD - network bridge
lxd-containers.service loaded activating start start LXD - container startup/shutdown
lxd.service loaded inactive dead start LXD - main daemon
mdadm.service loaded active running LSB: MD monitoring daemon
ModemManager.service loaded active running Modem Manager
networking.service loaded active exited Raise network interfaces
NetworkManager-wait-online.service loaded activating start start Network Manager Wait Online
NetworkManager.service loaded active running Network Manager
nfs-config.service loaded active exited Preprocess NFS configuration
nmbd.service loaded inactive dead start LSB: start Samba NetBIOS nameserver (nmbd)
ntp.service loaded inactive dead start LSB: Start NTP daemon
ofono.service loaded active running oFono Mobile telephony stack
ondemand.service loaded active running LSB: Set the CPU Frequency Scaling governor to "ondemand"
openvpn.service loaded active exited OpenVPN service
osspd.service loaded active running OSS Proxy Daemon
plymouth-quit-wait.service loaded inactive dead start Hold until boot process finishes up
polipo.service loaded active running LSB: Start or stop the polipo web cache
polkitd.service loaded active running Authenticate and Authorize Users to Run Privileged Tasks
postgresql.service loaded active exited PostgreSQL RDBMS
qemu-kvm.service loaded active exited LSB: QEMU KVM module loading script
rc-local.service loaded inactive dead start /etc/rc.local Compatibility
resolvconf.service loaded active exited Nameserver information manager
rsyslog.service loaded active running System Logging Service
rtkit-daemon.service loaded active running RealtimeKit Scheduling Policy Service
samba-ad-dc.service loaded inactive dead start LSB: start Samba daemons for the AD DC
schroot.service loaded inactive dead start LSB: Recover schroot sessions.
setvtrgb.service loaded inactive dead start Set console scheme
smartd.service loaded active running Self Monitoring and Reporting Technology (SMART) Daemon
smbd.service loaded inactive dead start LSB: start Samba SMB/CIFS daemon (smbd)
speech-dispatcher.service loaded active exited LSB: Speech Dispatcher
ssh.service loaded active running OpenBSD Secure Shell server
sysstat.service loaded active exited LSB: Start/stop sysstat's sadc
systemd-backlight@backlight:intel_backlight.service loaded active exited Load/Save Screen Backlight Brightness of backlight:intel_
systemd-backlight@leds:asus::kbd_backlight.service loaded active exited Load/Save Screen Backlight Brightness of leds:asus::kbd_b
systemd-fsck@dev-disk-by\x2duuid-1207\x2d4052.service loaded active exited File System Check on /dev/disk/by-uuid/1207-4052
systemd-fsck@dev-disk-by\x2duuid-4a44edd5\x2dd396\x2d443e\x2d9a6a\x2d41a81be97246.service loaded active exited File System Check on /dev/disk/by-uuid/4a44edd5-d396-443e
systemd-fsckd.service loaded active running File System Check Daemon to report status
systemd-hostnamed.service loaded active running Hostname Service
systemd-journal-flush.service loaded active exited Flush Journal to Persistent Storage
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-modules-load.service loaded active exited Load Kernel Modules
systemd-random-seed.service loaded active exited Load/Save Random Seed
systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-tmpfiles-setup-dev.service loaded active exited Create Static Device Nodes in /dev
systemd-tmpfiles-setup.service loaded active exited Create Volatile Files and Directories
systemd-udev-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-update-utmp-runlevel.service loaded inactive dead start Update UTMP about System Runlevel Changes
systemd-update-utmp.service loaded active exited Update UTMP about System Boot/Shutdown
systemd-user-sessions.service loaded active exited Permit User Sessions
sysvinit-backlight.service loaded active exited LSB: Save and restore screen and keyboard backlight level
thermald.service loaded active running Thermal Daemon Service
timidity.service loaded active running LSB: start and stop timidity
tor.service loaded active exited Anonymizing overlay network for TCP (multi-instance-maste
tor@default.service loaded active running Anonymizing overlay network for TCP
ubuntu-fan.service loaded inactive dead start Ubuntu FAN network setup
udisks.service loaded active running Disk Manager (legacy version)
udisks2.service loaded active running Disk Manager
ufw.service loaded active exited Uncomplicated firewall
upower.service loaded active running Daemon for power management
user@1000.service loaded active running User Manager for UID 1000
user@104.service loaded active running User Manager for UID 104
vboxautostart-service.service loaded active exited vboxautostart-service.service
vboxballoonctrl-service.service loaded active exited vboxballoonctrl-service.service
vboxdrv.service loaded active exited VirtualBox Linux kernel module
vboxweb-service.service loaded active running vboxweb-service.service
whoopsie.service loaded inactive dead start crash report submission daemon
winbind.service loaded inactive dead start LSB: start Winbind daemon
wpa_supplicant.service loaded active running WPA supplicant
LOAD = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB = The low-level unit activation state, values depend on unit type.
JOB = Pending job for the unit.
116 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
删除所有镜像和容器并添加-D到 docker 服务后更新：
$ docker run -it ubuntu:18.04
Unable to find image 'ubuntu:18.04' locally
18.04: Pulling from library/ubuntu
35c102085707: Pull complete
251f5509d51d: Pull complete
8e829fe70a46: Pull complete
6001e1789921: Pull complete
Digest: sha256:d1d454df0f579c6be4d8161d227462d69e163a8ff9d20a847533989cf0c94d90
Status: Downloaded newer image for ubuntu:18.04
docker: Error response from daemon: cgroups: cannot find cgroup mount destination: unknown.
$ tail -f /var/log/syslog | grep docker
Sep 7 20:57:34 norbert-UX32A dockerd[29727]: time="2019-09-07T20:57:34.235977407+03:00" level=debug msg="Calling GET /_ping"
Sep 7 20:57:34 norbert-UX32A dockerd[29727]: time="2019-09-07T20:57:34.239220453+03:00" level=debug msg="Calling POST /v1.39/containers/create"
Sep 7 20:57:34 norbert-UX32A dockerd[29727]: time="2019-09-07T20:57:34.239802159+03:00" level=debug msg="form data: {\"AttachStderr\":true,\"AttachStdin\":true,\"AttachStdout\":true,\"Cmd\":null,\"Domainname\":\"\",\"Entrypoint\":null,
小智 9
我在这个 Docker 问题中找到了解决方案：cgroups：找不到 cgroup mount 目的地
这是临时修复：
sudo mkdir /sys/fs/cgroup/systemd
sudo mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd
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