/
instances.go
297 lines (253 loc) · 9.55 KB
/
instances.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package actions
import (
"context"
"errors"
"log"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/rds"
"github.com/aws/aws-sdk-go-v2/service/rds/types"
)
// snippet-start:[gov2.rds.DbInstances.complete]
// snippet-start:[gov2.rds.DbInstances.struct]
type DbInstances struct {
RdsClient *rds.Client
}
// snippet-end:[gov2.rds.DbInstances.struct]
// snippet-start:[gov2.rds.DescribeDBParameterGroups]
// GetParameterGroup gets a DB parameter group by name.
func (instances *DbInstances) GetParameterGroup(parameterGroupName string) (
*types.DBParameterGroup, error) {
output, err := instances.RdsClient.DescribeDBParameterGroups(
context.TODO(), &rds.DescribeDBParameterGroupsInput{
DBParameterGroupName: aws.String(parameterGroupName),
})
if err != nil {
var notFoundError *types.DBParameterGroupNotFoundFault
if errors.As(err, ¬FoundError) {
log.Printf("Parameter group %v does not exist.\n", parameterGroupName)
err = nil
} else {
log.Printf("Error getting parameter group %v: %v\n", parameterGroupName, err)
}
return nil, err
} else {
return &output.DBParameterGroups[0], err
}
}
// snippet-end:[gov2.rds.DescribeDBParameterGroups]
// snippet-start:[gov2.rds.CreateDBParameterGroup]
// CreateParameterGroup creates a DB parameter group that is based on the specified
// parameter group family.
func (instances *DbInstances) CreateParameterGroup(
parameterGroupName string, parameterGroupFamily string, description string) (
*types.DBParameterGroup, error) {
output, err := instances.RdsClient.CreateDBParameterGroup(context.TODO(),
&rds.CreateDBParameterGroupInput{
DBParameterGroupName: aws.String(parameterGroupName),
DBParameterGroupFamily: aws.String(parameterGroupFamily),
Description: aws.String(description),
})
if err != nil {
log.Printf("Couldn't create parameter group %v: %v\n", parameterGroupName, err)
return nil, err
} else {
return output.DBParameterGroup, err
}
}
// snippet-end:[gov2.rds.CreateDBParameterGroup]
// snippet-start:[gov2.rds.DeleteDBParameterGroup]
// DeleteParameterGroup deletes the named DB parameter group.
func (instances *DbInstances) DeleteParameterGroup(parameterGroupName string) error {
_, err := instances.RdsClient.DeleteDBParameterGroup(context.TODO(),
&rds.DeleteDBParameterGroupInput{
DBParameterGroupName: aws.String(parameterGroupName),
})
if err != nil {
log.Printf("Couldn't delete parameter group %v: %v\n", parameterGroupName, err)
return err
} else {
return nil
}
}
// snippet-end:[gov2.rds.DeleteDBParameterGroup]
// snippet-start:[gov2.rds.DescribeDBParameters]
// GetParameters gets the parameters that are contained in a DB parameter group.
func (instances *DbInstances) GetParameters(parameterGroupName string, source string) (
[]types.Parameter, error) {
var output *rds.DescribeDBParametersOutput
var params []types.Parameter
var err error
parameterPaginator := rds.NewDescribeDBParametersPaginator(instances.RdsClient,
&rds.DescribeDBParametersInput{
DBParameterGroupName: aws.String(parameterGroupName),
Source: aws.String(source),
})
for parameterPaginator.HasMorePages() {
output, err = parameterPaginator.NextPage(context.TODO())
if err != nil {
log.Printf("Couldn't get parameters for %v: %v\n", parameterGroupName, err)
break
} else {
params = append(params, output.Parameters...)
}
}
return params, err
}
// snippet-end:[gov2.rds.DescribeDBParameters]
// snippet-start:[gov2.rds.ModifyDBParameterGroup]
// UpdateParameters updates parameters in a named DB parameter group.
func (instances *DbInstances) UpdateParameters(parameterGroupName string, params []types.Parameter) error {
_, err := instances.RdsClient.ModifyDBParameterGroup(context.TODO(),
&rds.ModifyDBParameterGroupInput{
DBParameterGroupName: aws.String(parameterGroupName),
Parameters: params,
})
if err != nil {
log.Printf("Couldn't update parameters in %v: %v\n", parameterGroupName, err)
return err
} else {
return nil
}
}
// snippet-end:[gov2.rds.ModifyDBParameterGroup]
// snippet-start:[gov2.rds.CreateDBSnapshot]
// CreateSnapshot creates a snapshot of a DB instance.
func (instances *DbInstances) CreateSnapshot(instanceName string, snapshotName string) (
*types.DBSnapshot, error) {
output, err := instances.RdsClient.CreateDBSnapshot(context.TODO(), &rds.CreateDBSnapshotInput{
DBInstanceIdentifier: aws.String(instanceName),
DBSnapshotIdentifier: aws.String(snapshotName),
})
if err != nil {
log.Printf("Couldn't create snapshot %v: %v\n", snapshotName, err)
return nil, err
} else {
return output.DBSnapshot, nil
}
}
// snippet-end:[gov2.rds.CreateDBSnapshot]
// snippet-start:[gov2.rds.DescribeDBSnapshots]
// GetSnapshot gets a DB instance snapshot.
func (instances *DbInstances) GetSnapshot(snapshotName string) (*types.DBSnapshot, error) {
output, err := instances.RdsClient.DescribeDBSnapshots(context.TODO(),
&rds.DescribeDBSnapshotsInput{
DBSnapshotIdentifier: aws.String(snapshotName),
})
if err != nil {
log.Printf("Couldn't get snapshot %v: %v\n", snapshotName, err)
return nil, err
} else {
return &output.DBSnapshots[0], nil
}
}
// snippet-end:[gov2.rds.DescribeDBSnapshots]
// snippet-start:[gov2.rds.CreateDBInstance]
// CreateInstance creates a DB instance.
func (instances *DbInstances) CreateInstance(instanceName string, dbName string,
dbEngine string, dbEngineVersion string, parameterGroupName string, dbInstanceClass string,
storageType string, allocatedStorage int32, adminName string, adminPassword string) (
*types.DBInstance, error) {
output, err := instances.RdsClient.CreateDBInstance(context.TODO(), &rds.CreateDBInstanceInput{
DBInstanceIdentifier: aws.String(instanceName),
DBName: aws.String(dbName),
DBParameterGroupName: aws.String(parameterGroupName),
Engine: aws.String(dbEngine),
EngineVersion: aws.String(dbEngineVersion),
DBInstanceClass: aws.String(dbInstanceClass),
StorageType: aws.String(storageType),
AllocatedStorage: aws.Int32(allocatedStorage),
MasterUsername: aws.String(adminName),
MasterUserPassword: aws.String(adminPassword),
})
if err != nil {
log.Printf("Couldn't create instance %v: %v\n", instanceName, err)
return nil, err
} else {
return output.DBInstance, nil
}
}
// snippet-end:[gov2.rds.CreateDBInstance]
// snippet-start:[gov2.rds.DescribeDBInstances]
// GetInstance gets data about a DB instance.
func (instances *DbInstances) GetInstance(instanceName string) (
*types.DBInstance, error) {
output, err := instances.RdsClient.DescribeDBInstances(context.TODO(),
&rds.DescribeDBInstancesInput{
DBInstanceIdentifier: aws.String(instanceName),
})
if err != nil {
var notFoundError *types.DBInstanceNotFoundFault
if errors.As(err, ¬FoundError) {
log.Printf("DB instance %v does not exist.\n", instanceName)
err = nil
} else {
log.Printf("Couldn't get instance %v: %v\n", instanceName, err)
}
return nil, err
} else {
return &output.DBInstances[0], nil
}
}
// snippet-end:[gov2.rds.DescribeDBInstances]
// snippet-start:[gov2.rds.DeleteDBInstance]
// DeleteInstance deletes a DB instance.
func (instances *DbInstances) DeleteInstance(instanceName string) error {
_, err := instances.RdsClient.DeleteDBInstance(context.TODO(), &rds.DeleteDBInstanceInput{
DBInstanceIdentifier: aws.String(instanceName),
SkipFinalSnapshot: true,
DeleteAutomatedBackups: aws.Bool(true),
})
if err != nil {
log.Printf("Couldn't delete instance %v: %v\n", instanceName, err)
return err
} else {
return nil
}
}
// snippet-end:[gov2.rds.DeleteDBInstance]
// snippet-start:[gov2.rds.DescribeDBEngineVersions]
// GetEngineVersions gets database engine versions that are available for the specified engine
// and parameter group family.
func (instances *DbInstances) GetEngineVersions(engine string, parameterGroupFamily string) (
[]types.DBEngineVersion, error) {
output, err := instances.RdsClient.DescribeDBEngineVersions(context.TODO(),
&rds.DescribeDBEngineVersionsInput{
Engine: aws.String(engine),
DBParameterGroupFamily: aws.String(parameterGroupFamily),
})
if err != nil {
log.Printf("Couldn't get engine versions for %v: %v\n", engine, err)
return nil, err
} else {
return output.DBEngineVersions, nil
}
}
// snippet-end:[gov2.rds.DescribeDBEngineVersions]
// snippet-start:[gov2.rds.DescribeOrderableDBInstanceOptions]
// GetOrderableInstances uses a paginator to get DB instance options that can be used to create DB instances that are
// compatible with a set of specifications.
func (instances *DbInstances) GetOrderableInstances(engine string, engineVersion string) (
[]types.OrderableDBInstanceOption, error) {
var output *rds.DescribeOrderableDBInstanceOptionsOutput
var instanceOptions []types.OrderableDBInstanceOption
var err error
orderablePaginator := rds.NewDescribeOrderableDBInstanceOptionsPaginator(instances.RdsClient,
&rds.DescribeOrderableDBInstanceOptionsInput{
Engine: aws.String(engine),
EngineVersion: aws.String(engineVersion),
})
for orderablePaginator.HasMorePages() {
output, err = orderablePaginator.NextPage(context.TODO())
if err != nil {
log.Printf("Couldn't get orderable DB instance options: %v\n", err)
break
} else {
instanceOptions = append(instanceOptions, output.OrderableDBInstanceOptions...)
}
}
return instanceOptions, err
}
// snippet-end:[gov2.rds.DescribeOrderableDBInstanceOptions]
// snippet-end:[gov2.rds.DbInstances.complete]