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azure.go
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azure.go
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/*
SPDX-License-Identifier: Apache-2.0
Copyright Contributors to the Submariner project.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package azure
import (
"encoding/json"
"os"
"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
"github.com/pkg/errors"
"github.com/submariner-io/admiral/pkg/reporter"
"github.com/submariner-io/admiral/pkg/util"
"github.com/submariner-io/cloud-prepare/pkg/api"
"github.com/submariner-io/cloud-prepare/pkg/azure"
"github.com/submariner-io/cloud-prepare/pkg/k8s"
"github.com/submariner-io/cloud-prepare/pkg/ocp"
"github.com/submariner-io/subctl/pkg/cloud"
"github.com/submariner-io/subctl/pkg/cluster"
)
type Config struct {
AirGappedDeployment bool
Gateways int
InfraID string
Region string
OcpMetadataFile string
AuthFile string
GWInstanceType string
}
func RunOn(clusterInfo *cluster.Info, config *Config, status reporter.Interface,
function func(api.Cloud, api.GatewayDeployer, reporter.Interface) error,
) error {
if config.OcpMetadataFile != "" {
var err error
config.InfraID, config.Region, err = readMetadataFile(config.OcpMetadataFile)
if err != nil {
return status.Error(err, "Failed to read Azure information from OCP metadata file %q", config.OcpMetadataFile)
}
status.Success("Obtained infra ID %q and region %q from OCP metadata file %q", config.InfraID, config.Region,
config.OcpMetadataFile)
}
status.Start("Retrieving Azure credentials from your Azure authorization file %q", config.AuthFile)
err := os.Setenv("AZURE_AUTH_LOCATION", config.AuthFile)
if err != nil {
return status.Error(err, "Unable to set AZURE_AUTH_LOCATION env variable")
}
subscriptionID, err := initializeFromAuthFile(config.AuthFile)
if err != nil {
return status.Error(err, "Failed to read authorization information from Azure authorization file")
}
status.End()
status.Start("Initializing Azure connectivity")
credentials, err := azidentity.NewEnvironmentCredential(nil)
if err != nil {
return status.Error(err, "Error getting an authorizer for Azure")
}
restConfig := clusterInfo.RestConfig
clientSet := clusterInfo.ClientProducer.ForKubernetes()
k8sClientSet := k8s.NewInterface(clientSet)
restMapper, err := util.BuildRestMapper(restConfig)
if err != nil {
return status.Error(err, "Failed to create restmapper")
}
dynamicClient := clusterInfo.ClientProducer.ForDynamic()
msDeployer := ocp.NewK8sMachinesetDeployer(restMapper, dynamicClient)
cloudInfo := &azure.CloudInfo{
SubscriptionID: subscriptionID,
InfraID: config.InfraID,
Region: config.Region,
BaseGroupName: config.InfraID + "-rg",
TokenCredential: credentials,
K8sClient: k8sClientSet,
}
azureCloud := azure.NewCloud(cloudInfo)
status.End()
gwDeployer, err := azure.NewOcpGatewayDeployer(cloudInfo, azureCloud, msDeployer, config.GWInstanceType)
if err != nil {
return status.Error(err, "Failed to initialize a GatewayDeployer config")
}
return function(azureCloud, gwDeployer, status)
}
func readMetadataFile(fileName string) (string, string, error) {
var metadata struct {
InfraID string `json:"infraID"`
Azure struct {
Region string `json:"region"`
} `json:"azure"`
}
err := cloud.ReadMetadataFile(fileName, &metadata)
return metadata.InfraID, metadata.Azure.Region, err //nolint:wrapcheck // No need to wrap here
}
func initializeFromAuthFile(authFile string) (string, error) {
data, err := os.ReadFile(authFile)
if err != nil {
return "", errors.Wrapf(err, "error reading file %q", authFile)
}
var authInfo struct {
ClientID string
ClientSecret string
SubscriptionID string
TenantID string
}
err = json.Unmarshal(data, &authInfo)
if err != nil {
return "", errors.Wrap(err, "error unmarshalling data")
}
if err := os.Setenv("AZURE_CLIENT_ID", authInfo.ClientID); err != nil {
return "", errors.Wrapf(err, "unable to set AZURE_CLIENT_ID env variable")
}
if err := os.Setenv("AZURE_CLIENT_SECRET", authInfo.ClientSecret); err != nil {
return "", errors.Wrapf(err, "unable to set AZURE_CLIENT_SECRET env variable")
}
if err := os.Setenv("AZURE_TENANT_ID", authInfo.TenantID); err != nil {
return "", errors.Wrapf(err, "unable to set AZURE_TENANT_ID env variable")
}
return authInfo.SubscriptionID, nil
}