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kubelet_restart.go
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kubelet_restart.go
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package k8s
import (
"context"
"github.com/cybozu-go/cke"
"github.com/cybozu-go/cke/op"
"github.com/cybozu-go/cke/op/common"
yaml "gopkg.in/yaml.v2"
)
type kubeletRestartOp struct {
nodes []*cke.Node
cluster string
podSubnet string
params cke.KubeletParams
step int
files *common.FilesBuilder
}
// KubeletRestartOp returns an Operator to restart kubelet
func KubeletRestartOp(nodes []*cke.Node, cluster, podSubnet string, params cke.KubeletParams) cke.Operator {
return &kubeletRestartOp{
nodes: nodes,
cluster: cluster,
podSubnet: podSubnet,
params: params,
files: common.NewFilesBuilder(nodes),
}
}
func (o *kubeletRestartOp) Name() string {
return "kubelet-restart"
}
func (o *kubeletRestartOp) NextCommand() cke.Commander {
switch o.step {
case 0:
o.step++
return common.ImagePullCommand(o.nodes, cke.HyperkubeImage)
case 1:
o.step++
return common.ImagePullCommand(o.nodes, cke.PauseImage)
case 2:
o.step++
return prepareKubeletConfigCommand{o.params, o.files}
case 3:
o.step++
return o.files
case 4:
o.step++
opts := []string{
"--pid=host",
"--mount=type=volume,src=dockershim,dst=/var/lib/dockershim",
"--privileged",
}
paramsMap := make(map[string]cke.ServiceParams)
for _, n := range o.nodes {
paramsMap[n.Address] = KubeletServiceParams(n)
}
return common.RunContainerCommand(o.nodes, op.KubeletContainerName, cke.HyperkubeImage,
common.WithOpts(opts),
common.WithParamsMap(paramsMap),
common.WithExtra(o.params.ServiceParams),
common.WithRestart())
default:
return nil
}
}
type prepareKubeletConfigCommand struct {
params cke.KubeletParams
files *common.FilesBuilder
}
func (c prepareKubeletConfigCommand) Run(ctx context.Context, inf cke.Infrastructure) error {
const kubeletConfigPath = "/etc/kubernetes/kubelet/config.yml"
caPath := op.K8sPKIPath("ca.crt")
tlsCertPath := op.K8sPKIPath("kubelet.crt")
tlsKeyPath := op.K8sPKIPath("kubelet.key")
cfg := newKubeletConfiguration(tlsCertPath, tlsKeyPath, caPath, c.params.Domain, c.params.AllowSwap)
g := func(ctx context.Context, n *cke.Node) ([]byte, error) {
cfg := cfg
cfg.ClusterDNS = []string{n.Address}
return yaml.Marshal(cfg)
}
return c.files.AddFile(ctx, kubeletConfigPath, g)
}
func (c prepareKubeletConfigCommand) Command() cke.Command {
return cke.Command{
Name: "prepare-kubelet-config",
}
}