Difference between revisions of "Kubeadm init"
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* <code>[[kubeadm init --ignore-preflight-errors=All]]</code> | * <code>[[kubeadm init --ignore-preflight-errors=All]]</code> | ||
| + | Dependencies: | ||
| + | * <code>[[kubeadm config images pull]]</code> | ||
| + | * <code>[[apt install socat]] [[conntrack]]</code> | ||
| + | * <code>[[snap install kubectl --classic]]</code> | ||
| + | * <code>[[snap install kubelet --classic]] && [[snap start kubelet.daemon]]</code> | ||
| + | * [[Ubuntu crictl installation|crictl-tools]] | ||
| + | |||
| + | == [[Play-with-K8s]] == | ||
| + | * <code>[[kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr 10.5.0.0/16]]</code> | ||
| + | * <code>[[kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml]]</code> | ||
== With errors == | == With errors == | ||
| − | + | ||
kubeadm init --pod-network-cidr=10.244.0.0/16 | kubeadm init --pod-network-cidr=10.244.0.0/16 | ||
W0419 17:17:35.020389 29884 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io | W0419 17:17:35.020389 29884 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io | ||
| Line 16: | Line 26: | ||
[preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": | [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": | ||
executable file not found in $PATH | executable file not found in $PATH | ||
| − | + | [WARNING FileExisting-socat]: socat not found in system path | |
| − | + | [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' | |
| − | + | error execution phase preflight: [preflight] Some fatal errors occurred: | |
| − | + | [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 | |
| − | + | [ERROR FileExisting-crictl]: [[crictl]] not found in system path | |
| − | + | [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist | |
| − | + | [ERROR FileExisting-conntrack]: conntrack not found in system path | |
| − | + | [ERROR KubeletVersion]: couldn't get kubelet version: cannot execute 'kubelet --version': executable file not found in $PATH | |
| − | + | [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 | |
| − | |||
| Line 55: | Line 64: | ||
To see the stack trace of this error execute with --v=5 or higher | To see the stack trace of this error execute with --v=5 or higher | ||
</pre> | </pre> | ||
| + | |||
| + | |||
| + | == [[v1.25]].4 == | ||
| + | [init] Using Kubernetes version: v1.25.4 | ||
| + | [preflight] Running pre-flight checks | ||
| + | W1203 13:22:13.289185 159684 checks.go:1019] [preflight] WARNING: Couldn't create the interface used for talking to the container | ||
| + | runtime: [[crictl]] is required by the container runtime: executable file not found in $PATH | ||
| + | [WARNING SystemVerification]: missing optional [[cgroups]]: [[blkio]] | ||
| + | [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' | ||
| + | error execution phase preflight: [preflight] Some fatal errors occurred: | ||
| + | [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist | ||
| + | [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1 | ||
| + | [ERROR FileExisting-crictl]: crictl not found in system path | ||
| + | [ERROR KubeletVersion]: couldn't get kubelet version: cannot execute 'kubelet --version': executable file not found in $PATH | ||
| + | [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 | ||
== Related terms == | == Related terms == | ||
| − | * <code>[[conntrack]] (command)</code> [[Netfilter]] (<code>[[apt install | + | * <code>[[conntrack]] (command)</code> [[Netfilter]] (<code>[[apt install conntrack]]</code>) |
| − | * <code>[[socat]]</code>: <code>[[apt install]] socat</code> | + | * <code>[[socat]]</code>: <code>[[apt install]] [[socat]]</code> |
* <code>[[kubeadm config images pull]]</code> | * <code>[[kubeadm config images pull]]</code> | ||
* [[Kubernetes (snap install)]] | * [[Kubernetes (snap install)]] | ||
* <code>[[kubeadm join]]</code> | * <code>[[kubeadm join]]</code> | ||
* <code>[[kind: ClusterConfiguration]]</code> | * <code>[[kind: ClusterConfiguration]]</code> | ||
| + | * <code>[[snap install kubelet --classic]]</code> | ||
| + | * <code>[[/etc/kubernetes/manifests/]]</code> | ||
== See also == | == See also == | ||
| + | * {{kubeadm init}} | ||
* {{kubeadm}} | * {{kubeadm}} | ||
* {{Kubernetes installation}} | * {{Kubernetes installation}} | ||
Latest revision as of 10:43, 20 March 2024
kubeadm init to bootstrap a Kubernetes control-plane node
kubeadm init --pod-network-cidr=10.244.0.0/16kubeadm init --ignore-preflight-errors=All
Dependencies:
kubeadm config images pullapt install socat conntracksnap install kubectl --classicsnap install kubelet --classic && snap start kubelet.daemon- crictl-tools
Contents
Play-with-K8s[edit]
kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr 10.5.0.0/16kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml
With errors[edit]
kubeadm init --pod-network-cidr=10.244.0.0/16 W0419 17:17:35.020389 29884 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io] [init] Using Kubernetes version: v1.18.2 [preflight] Running pre-flight checks [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": executable file not found in $PATH [WARNING FileExisting-socat]: socat not found in system path [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 [ERROR FileExisting-crictl]: crictl not found in system path [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist [ERROR FileExisting-conntrack]: conntrack not found in system path [ERROR KubeletVersion]: couldn't get kubelet version: cannot execute 'kubelet --version': executable file not found in $PATH [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
[ERROR NumCPU]: the number of available CPUs 1 is less than the required 2[edit]
kubeadm init --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=All
With errors: docker not installed[edit]
kubeadm init
W0823 18:18:03.055636 30827 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io] [init] Using Kubernetes version: v1.18.8 [preflight] Running pre-flight checks [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": executable file not found in $PATH [WARNING FileExisting-socat]: socat not found in system path [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 [ERROR FileExisting-crictl]: crictl not found in system path [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1 [ERROR FileExisting-conntrack]: conntrack not found in system path [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
v1.25.4[edit]
[init] Using Kubernetes version: v1.25.4 [preflight] Running pre-flight checks W1203 13:22:13.289185 159684 checks.go:1019] [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: crictl is required by the container runtime: executable file not found in $PATH [WARNING SystemVerification]: missing optional cgroups: blkio [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service' error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1 [ERROR FileExisting-crictl]: crictl not found in system path [ERROR KubeletVersion]: couldn't get kubelet version: cannot execute 'kubelet --version': executable file not found in $PATH [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
Related terms[edit]
conntrack (command)Netfilter (apt install conntrack)socat:apt install socatkubeadm config images pull- Kubernetes (snap install)
kubeadm joinkind: ClusterConfigurationsnap install kubelet --classic/etc/kubernetes/manifests/
See also[edit]
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