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/
StartLimitIntervalSec=0

[Service]
ExecStart={{.KubeletPath}}
Restart=always
# 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 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}}"
  kubeletExtraArgs:
    node-ip: {{.NodeIP}}
  taints: []
---
apiVersion: kubeadm.k8s.io/v1alpha3
kind: ClusterConfiguration
{{if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{range .ComponentOptions}}{{.Component}}ExtraArgs:{{range $i, $val := printMapInOrder .ExtraArgs ": " }}
  {{$val}}{{end}}
{{end -}}
{{if .FeatureArgs}}featureGates: {{range $i, $val := .FeatureArgs}}
  {{$i}}: {{$val}}{{end}}
{{end -}}
certificatesDir: {{.CertDir}}
clusterName: {{.ClusterName}}
apiServerCertSANs: ["127.0.0.1", "localhost", "{{.AdvertiseAddress}}"]
controlPlaneEndpoint: {{.ControlPlaneAddress}}:{{.APIServerPort}}
etcd:
  local:
    dataDir: {{.EtcdDataDir}}
controllerManagerExtraArgs:
  allocate-node-cidrs: "true"
  leader-elect: "false"
schedulerExtraArgs:
  leader-elect: "false"
kubernetesVersion: {{.KubernetesVersion}}
networking:
  dnsDomain: {{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}
  podSubnet: "{{ .PodSubnet }}"
  serviceSubnet: {{.ServiceCIDR}}
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
cgroupDriver: {{.CgroupDriver}}
clusterDomain: "{{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}"
# disable disk resource management by default
imageGCHighThresholdPercent: 100
evictionHard:
  nodefs.available: "0%"
  nodefs.inodesFree: "0%"
  imagefs.available: "0%"
failSwapOn: false
staticPodPath: {{.StaticPodPath}}
`))

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}}"
  kubeletExtraArgs:
    node-ip: {{.NodeIP}}
  taints: []
---
apiVersion: kubeadm.k8s.io/v1beta1
kind: ClusterConfiguration
{{ if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{range .ComponentOptions}}{{.Component}}:
{{- range $k, $v := .Pairs }}
  {{$k}}: {{$v}}
{{- end}}
  extraArgs:
{{- range $i, $val := printMapInOrder .ExtraArgs ": " }}
    {{$val}}
{{- end}}
{{end -}}
{{if .FeatureArgs}}featureGates:
{{range $i, $val := .FeatureArgs}}{{$i}}: {{$val}}
{{end -}}{{end -}}
certificatesDir: {{.CertDir}}
clusterName: {{.ClusterName}}
controlPlaneEndpoint: {{.ControlPlaneAddress}}:{{.APIServerPort}}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: {{.EtcdDataDir}}
    extraArgs:
      listen-metrics-urls: http://127.0.0.1:2381,http://{{.AdvertiseAddress}}:2381
kubernetesVersion: {{.KubernetesVersion}}
networking:
  dnsDomain: {{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}
  podSubnet: "{{.PodSubnet }}"
  serviceSubnet: {{.ServiceCIDR}}
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  x509:
    clientCAFile: {{.ClientCAFile}}
cgroupDriver: {{.CgroupDriver}}
clusterDomain: "{{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}"
# disable disk resource management by default
imageGCHighThresholdPercent: 100
evictionHard:
  nodefs.available: "0%"
  nodefs.inodesFree: "0%"
  imagefs.available: "0%"
failSwapOn: false
staticPodPath: {{.StaticPodPath}}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
clusterCIDR: "{{.PodSubnet }}"
metricsBindAddress: 0.0.0.0:10249
{{- range $i, $val := printMapInOrder .KubeProxyOptions ": " }}
{{$val}}
{{- end}}
`))

V1Beta1 is kubeadm config template for Kubernetes v1.13+

var V1Beta2 = template.Must(template.New("configTmpl-v1beta2").Funcs(template.FuncMap{
	"printMapInOrder": printMapInOrder,
}).Parse(`apiVersion: kubeadm.k8s.io/v1beta2
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}}"
  kubeletExtraArgs:
    node-ip: {{.NodeIP}}
  taints: []
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
{{ if .ImageRepository}}imageRepository: {{.ImageRepository}}
{{end}}{{range .ComponentOptions}}{{.Component}}:
{{- range $k, $v := .Pairs }}
  {{$k}}: {{$v}}
{{- end}}
  extraArgs:
{{- range $i, $val := printMapInOrder .ExtraArgs ": " }}
    {{$val}}
{{- end}}
{{end -}}
{{if .FeatureArgs}}featureGates:
{{range $i, $val := .FeatureArgs}}{{$i}}: {{$val}}
{{end -}}{{end -}}
certificatesDir: {{.CertDir}}
clusterName: mk
controlPlaneEndpoint: {{.ControlPlaneAddress}}:{{.APIServerPort}}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: {{.EtcdDataDir}}
    extraArgs:
      proxy-refresh-interval: "70000"
{{- range $i, $val := printMapInOrder .EtcdExtraArgs ": " }}
      {{$val}}
{{- end}}
kubernetesVersion: {{.KubernetesVersion}}
networking:
  dnsDomain: {{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}
  podSubnet: "{{.PodSubnet }}"
  serviceSubnet: {{.ServiceCIDR}}
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  x509:
    clientCAFile: {{.ClientCAFile}}
cgroupDriver: {{.CgroupDriver}}
clusterDomain: "{{if .DNSDomain}}{{.DNSDomain}}{{else}}cluster.local{{end}}"
# disable disk resource management by default
imageGCHighThresholdPercent: 100
evictionHard:
  nodefs.available: "0%"
  nodefs.inodesFree: "0%"
  imagefs.available: "0%"
failSwapOn: false
staticPodPath: {{.StaticPodPath}}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
clusterCIDR: "{{.PodSubnet }}"
metricsBindAddress: 0.0.0.0:10249
{{- range $i, $val := printMapInOrder .KubeProxyOptions ": " }}
{{$val}}
{{- end}}
`))

V1Beta2 is kubeadm config template for Kubernetes v1.17+