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nodeserver.go
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nodeserver.go
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package rkenodeconfigserver
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/pkg/errors"
"github.com/rancher/norman/types/slice"
"github.com/rancher/rancher/pkg/librke"
"github.com/rancher/rancher/pkg/rkecerts"
"github.com/rancher/rancher/pkg/rkeworker"
"github.com/rancher/rancher/pkg/tunnelserver"
"github.com/rancher/rke/services"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/sirupsen/logrus"
)
type RKENodeConfigServer struct {
auth *tunnelserver.Authorizer
lookup *rkecerts.BundleLookup
}
func Handler(auth *tunnelserver.Authorizer, scaledContext *config.ScaledContext) http.Handler {
return &RKENodeConfigServer{
auth: auth,
lookup: rkecerts.NewLookup(scaledContext.Core.Namespaces(""), scaledContext.K8sClient.CoreV1()),
}
}
func (n *RKENodeConfigServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
// 404 tells the client to continue without plan
// 5xx tells the client to try again later for plan
client, ok, err := n.auth.Authorize(req)
if err != nil {
rw.WriteHeader(http.StatusInternalServerError)
rw.Write([]byte(err.Error()))
return
}
if !ok {
rw.WriteHeader(http.StatusUnauthorized)
return
}
if client.Node == nil {
rw.WriteHeader(http.StatusNotFound)
return
}
if client.Cluster.Status.Driver == "" {
rw.WriteHeader(http.StatusServiceUnavailable)
return
}
if client.Cluster.Status.Driver != v3.ClusterDriverRKE {
rw.WriteHeader(http.StatusNotFound)
return
}
if client.Node.Status.NodeConfig == nil {
rw.WriteHeader(http.StatusServiceUnavailable)
return
}
if slice.ContainsString(client.Node.Status.NodeConfig.Role, services.ETCDRole) ||
slice.ContainsString(client.Node.Status.NodeConfig.Role, services.ControlRole) {
rw.WriteHeader(http.StatusNotFound)
return
}
nodeConfig, err := n.nodeConfig(req.Context(), client.Cluster, client.Node)
if err != nil {
rw.WriteHeader(http.StatusInternalServerError)
rw.Write([]byte(err.Error()))
return
}
rw.Header().Set("Content-Type", "application/json")
if err := json.NewEncoder(rw).Encode(nodeConfig); err != nil {
logrus.Errorf("failed to write nodeConfig to agent: %v", err)
}
}
func (n *RKENodeConfigServer) nodeConfig(ctx context.Context, cluster *v3.Cluster, node *v3.Node) (*rkeworker.NodeConfig, error) {
spec := cluster.Status.AppliedSpec
bundle, err := n.lookup.Lookup(cluster)
if err != nil {
return nil, err
}
bundle = bundle.ForNode(spec.RancherKubernetesEngineConfig, node.Status.NodeConfig.Address)
certString, err := bundle.Marshal()
if err != nil {
return nil, errors.Wrapf(err, "failed to marshall bundle")
}
plan, err := librke.New().GeneratePlan(ctx, spec.RancherKubernetesEngineConfig)
if err != nil {
return nil, err
}
nc := &rkeworker.NodeConfig{
Certs: certString,
ClusterName: cluster.Name,
}
for _, tempNode := range plan.Nodes {
if tempNode.Address == node.Status.NodeConfig.Address {
nc.Processes = tempNode.Processes
nc.Files = tempNode.Files
delete(nc.Processes, "etcd")
return nc, nil
}
}
return nil, fmt.Errorf("failed to find plan for %s", node.Status.NodeConfig.Address)
}