/
auth.go
188 lines (163 loc) · 5.97 KB
/
auth.go
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package agent
import (
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"net/url"
"github.com/fristonio/xene/pkg/apiserver/client"
"github.com/fristonio/xene/pkg/apiserver/client/registry"
"github.com/fristonio/xene/pkg/defaults"
"github.com/fristonio/xene/pkg/option"
"github.com/fristonio/xene/pkg/types/v1alpha1"
types "github.com/fristonio/xene/pkg/types/v1alpha1"
httptransport "github.com/go-openapi/runtime/client"
"github.com/go-openapi/strfmt"
log "github.com/sirupsen/logrus"
)
// JoinAPIServer joins the agent to the pool of servers registered on the API
// server.
func (s *Server) JoinAPIServer(apiServerAddr, agentName, agentAddr, authToken string) error {
addr, err := url.Parse(apiServerAddr)
if err != nil {
return fmt.Errorf("error while parsing Agent address: %s", err)
}
client := client.New(httptransport.New(addr.Host, "", nil), strfmt.Default)
bearerTokenAuth := httptransport.BearerToken(authToken)
res, err := client.Registry.GetAPIV1RegistryAgent(
registry.NewGetAPIV1RegistryAgentParams().WithName(&agentName), bearerTokenAuth)
if err != nil {
return fmt.Errorf("error getting current agent information: %s", err)
}
a := types.Agent{}
if res.Payload.Item.Value != "" {
err = json.Unmarshal([]byte(res.Payload.Item.Value), &a)
if err != nil {
return fmt.Errorf("error unmarshaling agent get response: %s", err)
}
}
agentManifest := types.Agent{
TypeMeta: types.TypeMeta{
Kind: types.AgentKind,
APIVersion: "v1alpha1",
},
Metadata: types.Metadata{
ObjectMeta: types.ObjectMeta{
Name: agentName,
Description: "Worker agents for xene",
},
},
Spec: types.AgentSpec{
Address: agentAddr,
Insecure: option.Config.Agent.Insecure,
LogServerEnabled: option.Config.Agent.LocalLogServer,
LogServerPort: option.Config.Agent.LogServerPort,
},
}
if !option.Config.Agent.Insecure {
// First create secrets corresponding to the agent.
err = s.createXeneSecrets(addr.Host, agentName, authToken)
if err != nil {
return err
}
agentManifest.Spec.ClientKeySecret = fmt.Sprintf("%s-client-key", agentName)
agentManifest.Spec.ClientCertSecret = fmt.Sprintf("%s-client-cert", agentName)
agentManifest.Spec.RootCASecret = fmt.Sprintf("%s-root-ca-chain", agentName)
agentManifest.Spec.ServerName = option.Config.Agent.ServerName
}
log.Infof("%v", a)
log.Infof("%v", agentManifest)
if a.DeepEquals(&agentManifest) {
log.Infof("agent information is already up to date in apiserver")
return nil
}
log.Infof("creating agent object for apiserver")
ag, err := json.Marshal(agentManifest)
if err != nil {
return fmt.Errorf("error while marshaling agent manifest: %s", err)
}
resp, err := client.Registry.
PostAPIV1RegistryAgent(registry.NewPostAPIV1RegistryAgentParams().WithAgent(string(ag)), bearerTokenAuth)
if err != nil {
return err
}
log.Infof("created %s agent: %s", agentName, resp.Payload.Message)
return nil
}
// createXeneSecrets creates all the required xene secrets in xene registry
// These secrets then can be in turn used by any agent GRPC client to manage
// agent.
func (s *Server) createXeneSecrets(apiServerAddr, agentName, authToken string) error {
if option.Config.Agent.Insecure {
return nil
}
log.Infof("creating xene agent client certificates which can be used by apiserver")
clientKey, err := ioutil.ReadFile(option.Config.Agent.ClientKeyFile)
if err != nil {
return fmt.Errorf("error while reading file %s: %s", option.Config.Agent.ClientKeyFile, err)
}
clientCert, err := ioutil.ReadFile(option.Config.Agent.ClientCertFile)
if err != nil {
return fmt.Errorf("error while reading file %s: %s", option.Config.Agent.ClientCertFile, err)
}
rootCA, err := ioutil.ReadFile(option.Config.Agent.RootCACert)
if err != nil {
return fmt.Errorf("error while reading file %s: %s", option.Config.Agent.RootCACert, err)
}
client := client.New(httptransport.New(apiServerAddr, "", nil), strfmt.Default)
bearerTokenAuth := httptransport.BearerToken(authToken)
var (
secretData []byte
secret = &v1alpha1.Secret{
TypeMeta: v1alpha1.TypeMeta{
Kind: v1alpha1.SecretKind,
APIVersion: "v1alpha1",
},
Metadata: v1alpha1.Metadata{
ObjectMeta: types.ObjectMeta{
Description: "Secrets for xene agent.",
},
},
Spec: v1alpha1.SecretSpec{
Type: defaults.SecretTypeCertificates,
},
}
)
secret.Spec.Content = base64.StdEncoding.EncodeToString([]byte(clientKey))
secret.Metadata.ObjectMeta.Name = fmt.Sprintf("%s-client-key", agentName)
secretData, err = json.Marshal(secret)
if err != nil {
return fmt.Errorf("error while marshaling secret manifest: %s", err)
}
resp, err := client.Registry.
PostAPIV1RegistrySecret(registry.NewPostAPIV1RegistrySecretParams().WithSecret(string(secretData)), bearerTokenAuth)
if err != nil {
return err
}
log.Infof("created %s secret: %s", secret.Metadata.GetName(), resp.Payload.Message)
secret.Spec.Content = base64.StdEncoding.EncodeToString([]byte(clientCert))
secret.Metadata.ObjectMeta.Name = fmt.Sprintf("%s-client-cert", agentName)
secretData, err = json.Marshal(secret)
if err != nil {
return fmt.Errorf("error while marshaling secret manifest: %s", err)
}
resp, err = client.Registry.
PostAPIV1RegistrySecret(registry.NewPostAPIV1RegistrySecretParams().WithSecret(string(secretData)), bearerTokenAuth)
if err != nil {
return err
}
log.Infof("created %s secret: %s", secret.Metadata.GetName(), resp.Payload.Message)
secret.Spec.Content = base64.StdEncoding.EncodeToString([]byte(rootCA))
secret.Metadata.ObjectMeta.Name = fmt.Sprintf("%s-root-ca-chain", agentName)
secretData, err = json.Marshal(secret)
if err != nil {
return fmt.Errorf("error while marshaling secret manifest: %s", err)
}
resp, err = client.Registry.
PostAPIV1RegistrySecret(registry.NewPostAPIV1RegistrySecretParams().WithSecret(string(secretData)), bearerTokenAuth)
if err != nil {
return err
}
log.Infof("created %s secret: %s", secret.Metadata.GetName(), resp.Payload.Message)
return nil
}