概要
- kubeadm init コマンドによりControlノードのセットアップを行ったところ、エラーが発生した。
エラー内容
# kubeadm init --control-plane-endpoint=x.x.x.x --pod-network-cidr=192.168.0.0/16 --cri-socket=unix:///run/containerd/containerd.sock
I0822 08:52:52.234471 5945 version.go:255] remote version is much newer: v1.28.0; falling back to: stable-1.24
[init] Using Kubernetes version: v1.24.16
[preflight] Running pre-flight checks
[WARNING SystemVerification]: missing optional cgroups: blkio
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-apiserver:v1.24.16: output: E0822 08:52:55.343032 5989 remote_image.go:171] "PullImage from image service failed" err="rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-apiserver:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-apiserver:v1.24.16\": k8s.gcr.io/kube-apiserver:v1.24.16: not found" image="k8s.gcr.io/kube-apiserver:v1.24.16"
time="2023-08-22T08:52:55Z" level=fatal msg="pulling image: rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-apiserver:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-apiserver:v1.24.16\": k8s.gcr.io/kube-apiserver:v1.24.16: not found"
, error: exit status 1
[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-controller-manager:v1.24.16: output: E0822 08:52:57.550148 6014 remote_image.go:171] "PullImage from image service failed" err="rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-controller-manager:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-controller-manager:v1.24.16\": k8s.gcr.io/kube-controller-manager:v1.24.16: not found" image="k8s.gcr.io/kube-controller-manager:v1.24.16"
time="2023-08-22T08:52:57Z" level=fatal msg="pulling image: rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-controller-manager:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-controller-manager:v1.24.16\": k8s.gcr.io/kube-controller-manager:v1.24.16: not found"
, error: exit status 1
[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-scheduler:v1.24.16: output: E0822 08:52:59.894264 6046 remote_image.go:171] "PullImage from image service failed" err="rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-scheduler:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-scheduler:v1.24.16\": k8s.gcr.io/kube-scheduler:v1.24.16: not found" image="k8s.gcr.io/kube-scheduler:v1.24.16"
time="2023-08-22T08:52:59Z" level=fatal msg="pulling image: rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-scheduler:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-scheduler:v1.24.16\": k8s.gcr.io/kube-scheduler:v1.24.16: not found"
, error: exit status 1
[ERROR ImagePull]: failed to pull image k8s.gcr.io/kube-proxy:v1.24.16: output: E0822 08:53:02.076973 6073 remote_image.go:171] "PullImage from image service failed" err="rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-proxy:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-proxy:v1.24.16\": k8s.gcr.io/kube-proxy:v1.24.16: not found" image="k8s.gcr.io/kube-proxy:v1.24.16"
time="2023-08-22T08:53:02Z" level=fatal msg="pulling image: rpc error: code = NotFound desc = failed to pull and unpack image \"k8s.gcr.io/kube-proxy:v1.24.16\": failed to resolve reference \"k8s.gcr.io/kube-proxy:v1.24.16\": k8s.gcr.io/kube-proxy:v1.24.16: not found", error: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher
解決策
- kubeadm initのオプションでバージョンを指定することで正常終了した。
# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.4", GitCommit:"95ee5ab382d64cfe6c28967f36b53970b8374491", GitTreeState:"clean", BuildDate:"2022-08-17T18:52:53Z", GoVersion:"go1.18.5", Compiler:"gc", Platform:"linux/amd64"}
# kubeadm init --control-plane-endpoint=x.x.x.x --pod-network-cidr=192.168.0.0/16 --cri-socket=unix:///run/containerd/containerd.sock --kubernetes-version=1.24.4
[init] Using Kubernetes version: v1.24.4
[preflight] Running pre-flight checks
[WARNING SystemVerification]: missing optional cgroups: blkio
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local takt13] and IPs [10.96.0.1 x.x.x.x]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost takt13] and IPs [x.x.x.x 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost takt13] and IPs [x.x.x.x 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 9.502912 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node takt13 as control-plane by adding the labels: [node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers]
[mark-control-plane] Marking the node takt13 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule node-role.kubernetes.io/control-plane:NoSchedule]
[bootstrap-token] Using token: 71qh43.jiwiv7oy73wy5kqh
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] Configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[kubelet-check] Initial timeout of 40s passed.
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:
kubeadm join x.x.x.x:6443 --token xxxxxxxxxxxxxxxxx \
--discovery-token-ca-cert-hash sha256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx \
--control-plane
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join x.x.x.x:6443 --token xxxxxxxxxxxxxxxxx \
--discovery-token-ca-cert-hash sha256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx