ktmpl

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• Variables

Variables

var KubeletServiceTemplate = template.Must(template.New("kubeletServiceTemplate").Parse(`[Unit]
Description=kubelet: The Kubernetes Node Agent
Documentation=http://kubernetes.io/docs/

[Service]
ExecStart={{.KubeletPath}}
Restart=always
StartLimitInterval=0
# Tuned for local dev: faster than upstream default (10s), but slower than systemd default (100ms)
RestartSec=600ms

[Install]
WantedBy=multi-user.target
`))

KubeletServiceTemplate is the base kubelet systemd template, written to kubeletServiceFile

var KubeletSystemdTemplate = template.Must(template.New("kubeletSystemdTemplate").Parse(`[Unit]
{{if or (eq .ContainerRuntime "cri-o") (eq .ContainerRuntime "cri")}}Wants=crio.service{{else if eq .ContainerRuntime "containerd"}}Wants=containerd.service{{else}}Wants=docker.socket{{end}}

[Service]
ExecStart=
ExecStart={{.KubeletPath}}{{if .ExtraOptions}} {{.ExtraOptions}}{{end}}

[Install]
`))

KubeletSystemdTemplate hosts the override kubelet flags, written to kubeletSystemdConfFile

var V1Alpha1 = template.Must(template.New("configTmpl-v1alpha1").Funcs(template.FuncMap{
	"printMapInOrder": printMapInOrder,
}).Parse(`apiVersion: kubeadm.k8s.io/v1alpha1
kind: MasterConfiguration
{{if .NoTaintMaster}}noTaintMaster: true{{end}}
api:
  advertiseAddress: {{.AdvertiseAddress}}
  bindPort: {{.APIServerPort}}
  controlPlaneEndpoint: localhost
kubernetesVersion: {{.KubernetesVersion}}
certificatesDir: {{.CertDir}}
networking:
  serviceSubnet: {{.ServiceCIDR}}
etcd:
  dataDir: {{.EtcdDataDir}}
nodeName: {{.NodeName}}
apiServerCertSANs: ["127.0.0.1", "localhost", "{{.AdvertiseAddress}}"]
{{if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{if .CRISocket}}criSocket: {{.CRISocket}}
{{end}}{{range .ExtraArgs}}{{.Component}}ExtraArgs:{{range $i, $val := printMapInOrder .Options ": " }}
  {{$val}}{{end}}
{{end}}{{if .FeatureArgs}}featureGates: {{range $i, $val := .FeatureArgs}}
  {{$i}}: {{$val}}{{end}}
{{end}}`))

V1Alpha1 is for Kubernetes v1.11

var V1Alpha3 = template.Must(template.New("configTmpl-v1alpha3").Funcs(template.FuncMap{
	"printMapInOrder": printMapInOrder,
}).Parse(`apiVersion: kubeadm.k8s.io/v1alpha3
kind: InitConfiguration
apiEndpoint:
  advertiseAddress: {{.AdvertiseAddress}}
  bindPort: {{.APIServerPort}}
bootstrapTokens:
  - groups:
      - system:bootstrappers:kubeadm:default-node-token
    ttl: 24h0m0s
    usages:
      - signing
      - authentication
nodeRegistration:
  criSocket: {{if .CRISocket}}{{.CRISocket}}{{else}}/var/run/dockershim.sock{{end}}
  name: {{.NodeName}}
  taints: []
---
apiVersion: kubeadm.k8s.io/v1alpha3
kind: ClusterConfiguration
{{if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{range .ExtraArgs}}{{.Component}}ExtraArgs:{{range $i, $val := printMapInOrder .Options ": " }}
  {{$val}}{{end}}
{{end -}}
{{if .FeatureArgs}}featureGates: {{range $i, $val := .FeatureArgs}}
  {{$i}}: {{$val}}{{end}}
{{end -}}
certificatesDir: {{.CertDir}}
clusterName: kubernetes
apiServerCertSANs: ["127.0.0.1", "localhost", "{{.AdvertiseAddress}}"]
controlPlaneEndpoint: localhost:{{.APIServerPort}}
etcd:
  local:
    dataDir: {{.EtcdDataDir}}
kubernetesVersion: {{.KubernetesVersion}}
networking:
  dnsDomain: {{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}
  podSubnet: "{{ .PodSubnet }}"
  serviceSubnet: {{.ServiceCIDR}}
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
evictionHard:
  nodefs.available: "0%"
  nodefs.inodesFree: "0%"
  imagefs.available: "0%"
`))

V1Alpha3 is for Kubernetes v1.12

var V1Beta1 = template.Must(template.New("configTmpl-v1beta1").Funcs(template.FuncMap{
	"printMapInOrder": printMapInOrder,
}).Parse(`apiVersion: kubeadm.k8s.io/v1beta1
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: {{.AdvertiseAddress}}
  bindPort: {{.APIServerPort}}
bootstrapTokens:
  - groups:
      - system:bootstrappers:kubeadm:default-node-token
    ttl: 24h0m0s
    usages:
      - signing
      - authentication
nodeRegistration:
  criSocket: {{if .CRISocket}}{{.CRISocket}}{{else}}/var/run/dockershim.sock{{end}}
  name: {{.NodeName}}
  taints: []
---
apiVersion: kubeadm.k8s.io/v1beta1
kind: ClusterConfiguration
{{ if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{range .ExtraArgs}}{{.Component}}:
  extraArgs:
{{- range $i, $val := printMapInOrder .Options ": " }}
    {{$val}}
{{- end}}
{{end -}}
{{if .FeatureArgs}}featureGates:
{{range $i, $val := .FeatureArgs}}{{$i}}: {{$val}}
{{end -}}{{end -}}
certificatesDir: {{.CertDir}}
clusterName: kubernetes
apiServer:
  certSANs: ["127.0.0.1", "localhost", "{{.AdvertiseAddress}}"]
controlPlaneEndpoint: localhost:{{.APIServerPort}}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: {{.EtcdDataDir}}
kubernetesVersion: {{.KubernetesVersion}}
networking:
  dnsDomain: {{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}
  podSubnet: "{{.PodSubnet }}"
  serviceSubnet: {{.ServiceCIDR}}
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
imageGCHighThresholdPercent: 100
evictionHard:
  nodefs.available: "0%"
  nodefs.inodesFree: "0%"
  imagefs.available: "0%"
`))

V1Beta1 is kubeadm config template for Kubernetes v1.13+