Hi,
this is my first post in this forum.
I’m trying to get a single-node cluster running on my x86 NAS using k3d.
There is a problem about the nodes.
But first let’s see, what I did:
k3d cluster create nas
Result:
INFO[0000] Prep: Network
INFO[0000] Created network ‘k3d-nas’
INFO[0001] Created volume ‘k3d-nas-images’
INFO[0002] Creating node ‘k3d-nas-server-0’
INFO[0003] Creating LoadBalancer ‘k3d-nas-serverlb’
INFO[0004] Starting cluster ‘nas’
INFO[0004] Starting servers…
INFO[0004] Starting Node ‘k3d-nas-server-0’
INFO[0019] Starting agents…
INFO[0019] Starting helpers…
INFO[0019] Starting Node ‘k3d-nas-serverlb’
INFO[0024] (Optional) Trying to get IP of the docker host and inject it into the cluster as ‘host.k3d.internal’ for easy access
INFO[0039] Successfully added host record to /etc/hosts in 2/2 nodes and to the CoreDNS ConfigMap
INFO[0039] Cluster ‘nas’ created successfully!
INFO[0039] --kubeconfig-update-default=false → sets --kubeconfig-switch-context=false
INFO[0040] You can now use it like this:
kubectl config use-context k3d-nas
kubectl cluster-info
At the first glance everything seems to be ok:
Output of “k3d node list”:
NAME ROLE CLUSTER STATUS
k3d-nas-server-0 server nas running
k3d-nas-serverlb loadbalancer nas running
Output of “kubectl cluster-info”
Kubernetes control plane is running at
https://0.0.0.0:34735
CoreDNS is running athttps://0.0.0.0:34735/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
Metrics-server is running athttps://0.0.0.0:34735/api/v1/namespaces/kube-system/services/https:metrics-server:/proxyTo further debug and diagnose cluster problems, use ‘kubectl cluster-info dump’.
Output of “kubectl get componentstatus”
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
But - and here is the problem - output of “kubectl get nodes”:
No resources found
So if there is no node in the cluster, it’s no wonder that calling “kubectl get pods -A” shows all nodes in pending state:
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system helm-install-traefik-6cn4p 0/1 Pending 0 4m4s
kube-system local-path-provisioner-7c458769fb-j4hc8 0/1 Pending 0 4m4s
kube-system metrics-server-86cbb8457f-f7frc 0/1 Pending 0 4m4s
kube-system coredns-854c77959c-pnx75 0/1 Pending 0 4m4s
Another problem that could point to the same problem is, that k3d hangs when initializing a cluster with the server and agent option: “k3d cluster create nas -s 1 -a 1”
INFO[0000] Prep: Network
INFO[0000] Created network ‘k3d-nas’
INFO[0000] Created volume ‘k3d-nas-images’
INFO[0001] Creating node ‘k3d-nas-server-0’
INFO[0002] Creating node ‘k3d-nas-agent-0’
INFO[0004] Creating LoadBalancer ‘k3d-nas-serverlb’
INFO[0004] Starting cluster ‘nas’
INFO[0004] Starting servers…
INFO[0004] Starting Node ‘k3d-nas-server-0’
INFO[0021] Starting agents…
INFO[0021] Starting Node ‘k3d-nas-agent-0’
And that’s it. The k3d command seems to hang. The --verbose option shows it:
[…]
INFO[0004] Starting cluster ‘nas’
INFO[0004] Starting servers…
DEBU[0004] Node k3d-nas-server-0 Start Time: 2021-02-20 22:15:53.002122564 +0100 CET m=+4.736044036
INFO[0004] Starting Node ‘k3d-nas-server-0’
DEBU[0007] Waiting for node k3d-nas-server-0 to get ready (Log: ‘k3s is up and running’)
DEBU[0019] Finished waiting for log message ‘k3s is up and running’ from node ‘k3d-nas-server-0’
INFO[0019] Starting agents…
DEBU[0019] Node k3d-nas-agent-0 Start Time: 2021-02-20 22:16:07.87600108 +0100 CET m=+19.609922560
INFO[0019] Starting Node ‘k3d-nas-agent-0’
DEBU[0023] Waiting for node k3d-nas-agent-0 to get ready (Log: ‘Successfully registered node’)
Some additional infos:
- k3d version v4.2.0
- k3s version v1.20.2-k3s1
- docker version 18.09.8
- NAS: Synology DS 218+ (10 GB RAM)
I recently got a k3os cluster running on my NAS using a virtual machine. Then I stumbled upon k3d and thought it would be a slightly more lightweight option to run k3s using docker than using a VM. This VM was switched off while trying to use k3d. I also delete .kube/config and .kube/cache before creating the k3d cluster.
I have no idea what’s the problem. I did some hours of searching, read several k3d tutorials but found no solution.
Any help would be appreciated!
Thanks in advance.