Lightweight Kubernetes
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package templates
import (
"bytes"
"text/template"
"github.com/rancher/k3s/pkg/daemons/config"
)
type ContainerdConfig struct {
NodeConfig *config.Node
IsRunningInUserNS bool
SELinuxEnabled bool
PrivateRegistryConfig *Registry
}
const ContainerdConfigTemplate = `
[plugins.opt]
path = "{{ .NodeConfig.Containerd.Opt }}"
[plugins.cri]
stream_server_address = "127.0.0.1"
stream_server_port = "10010"
enable_selinux = {{ .SELinuxEnabled }}
{{- if .IsRunningInUserNS }}
disable_cgroup = true
disable_apparmor = true
restrict_oom_score_adj = true
{{end}}
{{- if .NodeConfig.AgentConfig.PauseImage }}
sandbox_image = "{{ .NodeConfig.AgentConfig.PauseImage }}"
{{end}}
{{- if .NodeConfig.AgentConfig.Snapshotter }}
[plugins.cri.containerd]
snapshotter = "{{ .NodeConfig.AgentConfig.Snapshotter }}"
{{end}}
{{- if not .NodeConfig.NoFlannel }}
[plugins.cri.cni]
bin_dir = "{{ .NodeConfig.AgentConfig.CNIBinDir }}"
conf_dir = "{{ .NodeConfig.AgentConfig.CNIConfDir }}"
{{end}}
[plugins.cri.containerd.runtimes.runc]
runtime_type = "io.containerd.runc.v2"
{{ if .PrivateRegistryConfig }}
{{ if .PrivateRegistryConfig.Mirrors }}
[plugins.cri.registry.mirrors]{{end}}
{{range $k, $v := .PrivateRegistryConfig.Mirrors }}
[plugins.cri.registry.mirrors."{{$k}}"]
endpoint = [{{range $i, $j := $v.Endpoints}}{{if $i}}, {{end}}{{printf "%q" .}}{{end}}]
{{end}}
{{range $k, $v := .PrivateRegistryConfig.Configs }}
{{ if $v.Auth }}
[plugins.cri.registry.configs."{{$k}}".auth]
{{ if $v.Auth.Username }}username = {{ printf "%q" $v.Auth.Username }}{{end}}
{{ if $v.Auth.Password }}password = {{ printf "%q" $v.Auth.Password }}{{end}}
{{ if $v.Auth.Auth }}auth = {{ printf "%q" $v.Auth.Auth }}{{end}}
{{ if $v.Auth.IdentityToken }}identitytoken = {{ printf "%q" $v.Auth.IdentityToken }}{{end}}
{{end}}
{{ if $v.TLS }}
[plugins.cri.registry.configs."{{$k}}".tls]
{{ if $v.TLS.CAFile }}ca_file = "{{ $v.TLS.CAFile }}"{{end}}
{{ if $v.TLS.CertFile }}cert_file = "{{ $v.TLS.CertFile }}"{{end}}
{{ if $v.TLS.KeyFile }}key_file = "{{ $v.TLS.KeyFile }}"{{end}}
{{end}}
{{end}}
{{end}}
`
func ParseTemplateFromConfig(templateBuffer string, config interface{}) (string, error) {
out := new(bytes.Buffer)
t := template.Must(template.New("compiled_template").Parse(templateBuffer))
if err := t.Execute(out, config); err != nil {
return "", err
}
return out.String(), nil
}