❗ Docker >=v20.10.5 (runc >= v1.0.0-rc93) is required for k3d v5.x ❗ #807
Description
❗ TL;DR: Docker >=v20.10.5 is required for k3d v5.x ❗
What did you do
I tried to create a k3d cluster with k3d 5.x but it fails. Its working with 4.x
-
How was the cluster created?
sudo k3d cluster create MYCLUSTER --trace --verbose
-
What did you do afterwards?
It seems like some kind of k3d/docker integration issue. I have reproduced the error message by using this docker-compose.yml:
test-container:
image: rancher/k3d-tools:5.0.1
volumes:
- /var/run/docker.sock:/var/run/docker.sock
tmpfs:
- /var/runIt seems you can't mount the docker sock volume inside the /var/run tmpfs mount and k3d is failing when trying to do the same with the k3d-tools container.
What did you expect to happen
I expected the cluster to start normally
Screenshots or terminal output
❯ sudo k3d cluster create MYCLUSTER --trace --verbose
...
INFO[0000] Starting new tools node...
TRAC[0000] Creating node from spec
&{Name:k3d-MYCLUSTER-tools Role:noRole Image:docker.io/rancher/k3d-tools:5.0.0 Volumes:[k3d-MYCLUSTER-images:/k3d/images /var/run/docker.sock:/var/run/docker.sock] Env:[] Cmd:[] Args:[noop] Ports:map[] Restart:false Created: RuntimeLabels:map[app:k3d k3d.cluster:MYCLUSTER k3d.version:v5.0.0] K3sNodeLabels:map[] Networks:[k3d-MYCLUSTER] ExtraHosts:[] ServerOpts:{IsInit:false KubeAPI:<nil>} AgentOpts:{} GPURequest: Memory: State:{Running:false Status: Started:} IP:{IP:zero IP Static:false} HookActions:[]}
TRAC[0000] Creating docker container with translated config
&{ContainerConfig:{Hostname:k3d-MYCLUSTER-tools Domainname: User: AttachStdin:false AttachStdout:false AttachStderr:false ExposedPorts:map[] Tty:false OpenStdin:false StdinOnce:false Env:[K3S_KUBECONFIG_OUTPUT=/output/kubeconfig.yaml] Cmd:[noop] Healthcheck:<nil> ArgsEscaped:false Image:docker.io/rancher/k3d-tools:5.0.0 Volumes:map[] WorkingDir: Entrypoint:[] NetworkDisabled:false MacAddress: OnBuild:[] Labels:map[app:k3d k3d.cluster:MYCLUSTER k3d.role:noRole k3d.version:v5.0.0] StopSignal: StopTimeout:<nil> Shell:[]} HostConfig:{Binds:[k3d-MYCLUSTER-images:/k3d/images /var/run/docker.sock:/var/run/docker.sock] ContainerIDFile: LogConfig:{Type: Config:map[]} NetworkMode: PortBindings:map[] RestartPolicy:{Name: MaximumRetryCount:0} AutoRemove:false VolumeDriver: VolumesFrom:[] CapAdd:[] CapDrop:[] CgroupnsMode: DNS:[] DNSOptions:[] DNSSearch:[] ExtraHosts:[] GroupAdd:[] IpcMode: Cgroup: Links:[] OomScoreAdj:0 PidMode: Privileged:true PublishAllPorts:false ReadonlyRootfs:false SecurityOpt:[] StorageOpt:map[] Tmpfs:map[/run: /var/run:] UTSMode: UsernsMode: ShmSize:0 Sysctls:map[] Runtime: ConsoleSize:[0 0] Isolation: Resources:{CPUShares:0 Memory:0 NanoCPUs:0 CgroupParent: BlkioWeight:0 BlkioWeightDevice:[] BlkioDeviceReadBps:[] BlkioDeviceWriteBps:[] BlkioDeviceReadIOps:[] BlkioDeviceWriteIOps:[] CPUPeriod:0 CPUQuota:0 CPURealtimePeriod:0 CPURealtimeRuntime:0 CpusetCpus: CpusetMems: Devices:[] DeviceCgroupRules:[] DeviceRequests:[] KernelMemory:0 KernelMemoryTCP:0 MemoryReservation:0 MemorySwap:0 MemorySwappiness:<nil> OomKillDisable:<nil> PidsLimit:<nil> Ulimits:[] CPUCount:0 CPUPercent:0 IOMaximumIOps:0 IOMaximumBandwidth:0} Mounts:[] MaskedPaths:[] ReadonlyPaths:[] Init:0xc00020630f} NetworkingConfig:{EndpointsConfig:map[k3d-MYCLUSTER:0xc00024e000]}}
DEBU[0000] Created container k3d-MYCLUSTER-tools (ID: 6aed150173f55ae288a9334302ccb6684dda8e9bdc1bc77af3454e4ab8743c64)
DEBU[0000] Node k3d-MYCLUSTER-tools Start Time: 2021-10-18 17:15:55.925990393 +0200 CEST m=+0.122850186
TRAC[0000] Starting node 'k3d-MYCLUSTER-tools'
INFO[0000] Starting Node 'k3d-MYCLUSTER-tools'
ERRO[0000] Failed to run tools container for cluster 'MYCLUSTER'
...
INFO[0001] Starting existing tools node k3d-devo-tools...
INFO[0001] Starting Node 'k3d-devo-tools'
ERRO[0001] failed to gather environment information used for cluster creation: error starting existing tools node k3d-devo-tools: docker failed to start container for node 'k3d-devo-tools': Error response from daemon: OCI runtime create failed: container_linux.go:370: starting container process caused: process_linux.go:459: container init caused: rootfs_linux.go:59: mounting "/var/run/docker.sock" to rootfs at "/var/run/docker.sock" caused: stat /var/run/docker.sock: no such file or directory: unknown
ERRO[0001] Failed to create cluster >>> Rolling Back Which OS & Architecture
- Linux x86
Which version of k3d
k3d version v5.0.1
k3s version v1.21.5-k3s1 (default)`
Which version of docker
Client: Docker Engine - Community
Version: 20.10.2
API version: 1.41
Go version: go1.13.15
Git commit: 2291f61
Built: Mon Dec 28 16:17:32 2020
OS/Arch: linux/amd64
Context: default
Experimental: true