Estoy intentando ejecutar Docker en Google Colab y tengo algunos problemas. Seguí los pasos para instalar Docker en Ubuntu ( https://docs.docker.com/engine/install/ubuntu/ ), que son muy similares a los pasos que otros han usado para instalarlo en Digital Ocean ( https:// colab.research.google.com/drive/10OinT5ZNGtdLLQ9K399jlKgNgidxUbGP#scrollTo=9zp-VmLsws2r ).

Puedo instalar Docker correctamente. Lo sé porque cuando ejecuto docker --version obtengo el resultado: Docker version 19.03.11, build 42e35e61f3 , y nunca recibo ningún error que indique que el comando docker no se reconoce.

Pero cuando intento ejecutar sudo docker run hello-world --priveleged , obtengo el siguiente resultado: docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?. .

Hice algunos diagnósticos ejecutando sudo dockerd --debug y el resultado se muestra a continuación. Lo he comprobado, y tanto iptables como mi kernel están completamente actualizados. Ejecutar whoami devuelve root . Algunos han recomendado reiniciar el kernel, lo que tampoco ayudó.

Esto parece un problema específico de Google Colab, pero no puedo averiguar exactamente qué es lo que está mal. Alguien tiene alguna opinión? Por favor, hágamelo saber si necesita más información.

Gracias,

Robar

Aquí está exactamente el código que ejecuté en Google Colab:

 %%shell sudo curl -fsSL https://get.docker.com/ | sh sudo usermod -aG docker root sudo docker run hello-world --priveleged sudo dockerd --debug

Y aquí está el error:

 INFO[2020-06-06T22:08:10.430389079Z] Starting up DEBU[2020-06-06T22:08:10.430968786Z] Listener created for HTTP on unix (/var/run/docker.sock) DEBU[2020-06-06T22:08:10.430993252Z] Containerd not running, starting daemon managed containerd INFO[2020-06-06T22:08:10.431768021Z] libcontainerd: started new containerd process pid=19853 INFO[2020-06-06T22:08:10.431817137Z] parsed scheme: "unix" module=grpc INFO[2020-06-06T22:08:10.431844607Z] scheme "unix" not registered, fallback to default scheme module=grpc INFO[2020-06-06T22:08:10.431872314Z] ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock 0 <nil>}] <nil>} module=grpc INFO[2020-06-06T22:08:10.431886205Z] ClientConn switching balancer to "pick_first" module=grpc INFO[2020-06-06T22:08:10.460579142Z] starting containerd revision=7ad184331fa3e55e52b890ea95e65ba581ae3429 version=1.2.13 DEBU[2020-06-06T22:08:10.460646512Z] changing OOM score to -500 ERRO[2020-06-06T22:08:10.460696793Z] failed to change OOM score to -500 error="write /proc/19853/oom_score_adj: permission denied" INFO[2020-06-06T22:08:10.460996041Z] loading plugin "io.containerd.content.v1.content"... type=io.containerd.content.v1 INFO[2020-06-06T22:08:10.461036833Z] loading plugin "io.containerd.snapshotter.v1.btrfs"... type=io.containerd.snapshotter.v1 WARN[2020-06-06T22:08:10.461276128Z] failed to load plugin io.containerd.snapshotter.v1.btrfs error="path /var/lib/docker/containerd/daemon/io.containerd.snapshotter.v1.btrfs must be a btrfs filesystem to be used with the btrfs snapshotter" INFO[2020-06-06T22:08:10.461294855Z] loading plugin "io.containerd.snapshotter.v1.aufs"... type=io.containerd.snapshotter.v1 WARN[2020-06-06T22:08:10.462332024Z] failed to load plugin io.containerd.snapshotter.v1.aufs error="modprobe aufs failed: "modprobe: FATAL: Module aufs not found in directory /lib/modules/4.19.104+\n": exit status 1" INFO[2020-06-06T22:08:10.462354904Z] loading plugin "io.containerd.snapshotter.v1.native"... type=io.containerd.snapshotter.v1 INFO[2020-06-06T22:08:10.462404944Z] loading plugin "io.containerd.snapshotter.v1.overlayfs"... type=io.containerd.snapshotter.v1 INFO[2020-06-06T22:08:10.462528569Z] loading plugin "io.containerd.snapshotter.v1.zfs"... type=io.containerd.snapshotter.v1 INFO[2020-06-06T22:08:10.462929351Z] skip loading plugin "io.containerd.snapshotter.v1.zfs"... type=io.containerd.snapshotter.v1 INFO[2020-06-06T22:08:10.462950017Z] loading plugin "io.containerd.metadata.v1.bolt"... type=io.containerd.metadata.v1 WARN[2020-06-06T22:08:10.462975101Z] could not use snapshotter btrfs in metadata plugin error="path /var/lib/docker/containerd/daemon/io.containerd.snapshotter.v1.btrfs must be a btrfs filesystem to be used with the btrfs snapshotter" WARN[2020-06-06T22:08:10.462987603Z] could not use snapshotter aufs in metadata plugin error="modprobe aufs failed: "modprobe: FATAL: Module aufs not found in directory /lib/modules/4.19.104+\n": exit status 1" WARN[2020-06-06T22:08:10.463001160Z] could not use snapshotter zfs in metadata plugin error="path /var/lib/docker/containerd/daemon/io.containerd.snapshotter.v1.zfs must be a zfs filesystem to be used with the zfs snapshotter: skip plugin" INFO[2020-06-06T22:08:10.463088275Z] loading plugin "io.containerd.differ.v1.walking"... type=io.containerd.differ.v1 INFO[2020-06-06T22:08:10.463110086Z] loading plugin "io.containerd.gc.v1.scheduler"... type=io.containerd.gc.v1 INFO[2020-06-06T22:08:10.463144139Z] loading plugin "io.containerd.service.v1.containers-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463167701Z] loading plugin "io.containerd.service.v1.content-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463186973Z] loading plugin "io.containerd.service.v1.diff-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463206483Z] loading plugin "io.containerd.service.v1.images-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463227897Z] loading plugin "io.containerd.service.v1.leases-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463246966Z] loading plugin "io.containerd.service.v1.namespaces-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463264776Z] loading plugin "io.containerd.service.v1.snapshots-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463283179Z] loading plugin "io.containerd.runtime.v1.linux"... type=io.containerd.runtime.v1 INFO[2020-06-06T22:08:10.463370355Z] loading plugin "io.containerd.runtime.v2.task"... type=io.containerd.runtime.v2 INFO[2020-06-06T22:08:10.463431282Z] loading plugin "io.containerd.monitor.v1.cgroups"... type=io.containerd.monitor.v1 INFO[2020-06-06T22:08:10.463905587Z] loading plugin "io.containerd.service.v1.tasks-service"... type=io.containerd.service.v1 INFO[2020-06-06T22:08:10.463938829Z] loading plugin "io.containerd.internal.v1.restart"... type=io.containerd.internal.v1 INFO[2020-06-06T22:08:10.463987516Z] loading plugin "io.containerd.grpc.v1.containers"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464006257Z] loading plugin "io.containerd.grpc.v1.content"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464023427Z] loading plugin "io.containerd.grpc.v1.diff"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464039729Z] loading plugin "io.containerd.grpc.v1.events"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464056143Z] loading plugin "io.containerd.grpc.v1.healthcheck"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464076162Z] loading plugin "io.containerd.grpc.v1.images"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464092665Z] loading plugin "io.containerd.grpc.v1.leases"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464138115Z] loading plugin "io.containerd.grpc.v1.namespaces"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464157926Z] loading plugin "io.containerd.internal.v1.opt"... type=io.containerd.internal.v1 INFO[2020-06-06T22:08:10.464214011Z] loading plugin "io.containerd.grpc.v1.snapshots"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464232479Z] loading plugin "io.containerd.grpc.v1.tasks"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464250571Z] loading plugin "io.containerd.grpc.v1.version"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464267665Z] loading plugin "io.containerd.grpc.v1.introspection"... type=io.containerd.grpc.v1 INFO[2020-06-06T22:08:10.464535499Z] serving... address="/var/run/docker/containerd/containerd-debug.sock" INFO[2020-06-06T22:08:10.464610161Z] serving... address="/var/run/docker/containerd/containerd.sock" INFO[2020-06-06T22:08:10.464628619Z] containerd successfully booted in 0.004750s DEBU[2020-06-06T22:08:10.478839838Z] Started daemon managed containerd DEBU[2020-06-06T22:08:10.479163732Z] Permission denied writing "-500" to /proc/self/oom_score_adj DEBU[2020-06-06T22:08:10.479491477Z] Golang's threads limit set to 93420 INFO[2020-06-06T22:08:10.479914598Z] parsed scheme: "unix" module=grpc INFO[2020-06-06T22:08:10.479950021Z] scheme "unix" not registered, fallback to default scheme module=grpc INFO[2020-06-06T22:08:10.479994253Z] ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock 0 <nil>}] <nil>} module=grpc INFO[2020-06-06T22:08:10.480008702Z] ClientConn switching balancer to "pick_first" module=grpc INFO[2020-06-06T22:08:10.481507826Z] parsed scheme: "unix" module=grpc INFO[2020-06-06T22:08:10.481551933Z] scheme "unix" not registered, fallback to default scheme module=grpc INFO[2020-06-06T22:08:10.481574834Z] ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock 0 <nil>}] <nil>} module=grpc INFO[2020-06-06T22:08:10.481587896Z] ClientConn switching balancer to "pick_first" module=grpc DEBU[2020-06-06T22:08:10.482587875Z] Using default logging driver json-file DEBU[2020-06-06T22:08:10.482634103Z] [graphdriver] priority list: [btrfs zfs overlay2 aufs overlay devicemapper vfs] DEBU[2020-06-06T22:08:10.482693139Z] zfs command is not available: exec: "zfs": executable file not found in $PATH storage-driver=zfs DEBU[2020-06-06T22:08:10.482712159Z] processing event stream module=libcontainerd namespace=plugins.moby ERRO[2020-06-06T22:08:10.494846158Z] failed to mount overlay: invalid argument storage-driver=overlay2 ERRO[2020-06-06T22:08:10.495940320Z] AUFS was not found in /proc/filesystems storage-driver=aufs ERRO[2020-06-06T22:08:10.508077799Z] failed to mount overlay: invalid argument storage-driver=overlay DEBU[2020-06-06T22:08:10.509386612Z] Initialized graph driver vfs DEBU[2020-06-06T22:08:10.521417061Z] Max Concurrent Downloads: 3 DEBU[2020-06-06T22:08:10.521441888Z] Max Concurrent Uploads: 5 INFO[2020-06-06T22:08:10.521484213Z] Loading containers: start. DEBU[2020-06-06T22:08:10.521565238Z] Option Experimental: false DEBU[2020-06-06T22:08:10.521595561Z] Option DefaultDriver: bridge DEBU[2020-06-06T22:08:10.521606624Z] Option DefaultNetwork: bridge DEBU[2020-06-06T22:08:10.521617533Z] Network Control Plane MTU: 1500 DEBU[2020-06-06T22:08:10.521732715Z] processing event stream module=libcontainerd namespace=moby WARN[2020-06-06T22:08:10.522980796Z] Running iptables --wait -t nat -L -n failed with message: `iptables v1.6.1: can't initialize iptables table `nat': Permission denied (you must be root) Perhaps iptables or your kernel needs to be upgraded.`, error: exit status 3 DEBU[2020-06-06T22:08:10.523046607Z] Fail to initialize firewalld: Failed to connect to D-Bus system bus: dial unix /var/run/dbus/system_bus_socket: connect: no such file or directory, using raw iptables instead DEBU[2020-06-06T22:08:10.525297489Z] /sbin/iptables, [-t filter -C FORWARD -j DOCKER-ISOLATION] DEBU[2020-06-06T22:08:10.526293151Z] /sbin/iptables, [-t nat -D PREROUTING -m addrtype --dst-type LOCAL -j DOCKER] DEBU[2020-06-06T22:08:10.527312194Z] /sbin/iptables, [-t nat -D OUTPUT -m addrtype --dst-type LOCAL ! --dst 127.0.0.0/8 -j DOCKER] DEBU[2020-06-06T22:08:10.528249067Z] /sbin/iptables, [-t nat -D OUTPUT -m addrtype --dst-type LOCAL -j DOCKER] DEBU[2020-06-06T22:08:10.529256673Z] /sbin/iptables, [-t nat -D PREROUTING] DEBU[2020-06-06T22:08:10.530097230Z] /sbin/iptables, [-t nat -D OUTPUT] DEBU[2020-06-06T22:08:10.530898377Z] /sbin/iptables, [-t nat -F DOCKER] DEBU[2020-06-06T22:08:10.531707985Z] /sbin/iptables, [-t nat -X DOCKER] DEBU[2020-06-06T22:08:10.532515381Z] /sbin/iptables, [-t filter -F DOCKER] DEBU[2020-06-06T22:08:10.533289600Z] /sbin/iptables, [-t filter -X DOCKER] DEBU[2020-06-06T22:08:10.534161170Z] /sbin/iptables, [-t filter -F DOCKER-ISOLATION-STAGE-1] DEBU[2020-06-06T22:08:10.534943495Z] /sbin/iptables, [-t filter -X DOCKER-ISOLATION-STAGE-1] DEBU[2020-06-06T22:08:10.535746652Z] /sbin/iptables, [-t filter -F DOCKER-ISOLATION-STAGE-2] DEBU[2020-06-06T22:08:10.536501715Z] /sbin/iptables, [-t filter -X DOCKER-ISOLATION-STAGE-2] DEBU[2020-06-06T22:08:10.537334216Z] /sbin/iptables, [-t filter -F DOCKER-ISOLATION] DEBU[2020-06-06T22:08:10.538112885Z] /sbin/iptables, [-t filter -X DOCKER-ISOLATION] DEBU[2020-06-06T22:08:10.538925285Z] /sbin/iptables, [-t nat -n -L DOCKER] DEBU[2020-06-06T22:08:10.539675733Z] /sbin/iptables, [-t nat -N DOCKER] DEBU[2020-06-06T22:08:10.540408597Z] daemon configured with a 15 seconds minimum shutdown timeout DEBU[2020-06-06T22:08:10.540428145Z] start clean shutdown of all containers with a 15 seconds timeout... DEBU[2020-06-06T22:08:10.540809633Z] Cleaning up old mountid : start. INFO[2020-06-06T22:08:10.540855630Z] stopping event stream following graceful shutdown error="<nil>" module=libcontainerd namespace=moby DEBU[2020-06-06T22:08:10.541282726Z] Cleaning up old mountid : done. INFO[2020-06-06T22:08:10.541490677Z] stopping healthcheck following graceful shutdown module=libcontainerd INFO[2020-06-06T22:08:10.541509355Z] stopping event stream following graceful shutdown error="context canceled" module=libcontainerd namespace=plugins.moby DEBU[2020-06-06T22:08:10.541598181Z] received signal signal=terminated failed to start daemon: Error initializing network controller: error obtaining controller instance: failed to create NAT chain DOCKER: iptables failed: iptables -t nat -N DOCKER: iptables v1.6.1: can't initialize iptables table `nat': Permission denied (you must be root) Perhaps iptables or your kernel needs to be upgraded. (exit status 3)