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scheduled_tasks_configure.go
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scheduled_tasks_configure.go
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package cmd
import (
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/private/protocol/json/jsonutil"
"github.com/aws/aws-sdk-go/service/ecs"
"github.com/aws/aws-sdk-go/service/eventbridge"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
func getAWSErrorCode(err error) string {
if aerr, ok := err.(awserr.Error); ok {
return aerr.Code()
}
return ""
}
func scheduledTasksConfigureRun(cmd *cobra.Command, scheduledTasks []string) {
clustersDescription, err := ecsI.DescribeClusters(&ecs.DescribeClustersInput{
Clusters: []*string{aws.String(viper.GetString("cluster"))},
})
t.Must(err)
clusterArn := clustersDescription.Clusters[0].ClusterArn
if len(clustersDescription.Clusters) == 0 {
t.Exitln("Source Cluster informed not found")
}
ruleName := aws.String(scheduledTasks[0])
rule, err := evbI.DescribeRule(&eventbridge.DescribeRuleInput{Name: ruleName})
if getAWSErrorCode(err) == eventbridge.ErrCodeResourceNotFoundException {
err = nil
rule.EventBusName = aws.String("default")
rule.Name = ruleName
}
t.Must(err)
if c := viper.GetString("expression"); c != "" {
rule.ScheduleExpression = aws.String(c)
}
switch viper.GetString("state") {
case "disabled":
rule.State = aws.String(eventbridge.RuleStateDisabled)
case "enabled":
rule.State = aws.String(eventbridge.RuleStateEnabled)
}
_, err = evbI.PutRule(&eventbridge.PutRuleInput{
Description: rule.Description,
EventBusName: rule.EventBusName,
EventPattern: rule.EventPattern,
Name: rule.Name,
RoleArn: rule.RoleArn,
ScheduleExpression: rule.ScheduleExpression,
State: rule.State,
})
t.Must(err)
targetsList, err := evbI.ListTargetsByRule(&eventbridge.ListTargetsByRuleInput{Rule: rule.Name})
t.Must(err)
var target *eventbridge.Target
for _, t := range targetsList.Targets {
if aws.StringValue(t.Arn) == aws.StringValue(clusterArn) {
target = t
break
}
}
var override ecs.TaskOverride
if target == nil {
target = &eventbridge.Target{}
target.Arn = clusterArn
target.Id = rule.Name
target.EcsParameters = &eventbridge.EcsParameters{}
target.EcsParameters.LaunchType = aws.String("EC2")
target.EcsParameters.TaskCount = aws.Int64(1)
ecsEventsRole, err := iamI.GetRole(&iam.GetRoleInput{
RoleName: aws.String(viper.GetString("events-role")),
})
t.Must(err)
target.RoleArn = ecsEventsRole.Role.Arn
} else {
jsonutil.UnmarshalJSON(&override, strings.NewReader(aws.StringValue(target.Input)))
}
family := viper.GetString("task-definition")
tdDescription, err := ecsI.DescribeTaskDefinition(&ecs.DescribeTaskDefinitionInput{
TaskDefinition: aws.String(family),
})
t.Must(err)
if c := viper.GetString("command"); c != "" {
if len(override.ContainerOverrides) == 0 {
override.ContainerOverrides = append(override.ContainerOverrides, &ecs.ContainerOverride{
Name: tdDescription.TaskDefinition.ContainerDefinitions[0].Name,
})
}
override.ContainerOverrides[0].Command = aws.StringSlice(strings.Split(c, " "))
bytes, err := jsonutil.BuildJSON(override)
t.Must(err)
target.Input = aws.String(string(bytes))
}
target.EcsParameters.TaskDefinitionArn = tdDescription.TaskDefinition.TaskDefinitionArn
evbI.PutTargets(&eventbridge.PutTargetsInput{
EventBusName: rule.EventBusName,
Rule: rule.Name,
Targets: []*eventbridge.Target{target},
})
}
var scheduledTasksConfigureCmd = &cobra.Command{
Use: "configure",
Short: "Configure (update or create) scheduled tasks of specified cluster",
Aliases: []string{"c"},
Args: cobra.MinimumNArgs(1),
Run: scheduledTasksConfigureRun,
PersistentPreRun: persistentPreRun,
}
func init() {
scheduledTasksCmd.AddCommand(scheduledTasksConfigureCmd)
flags := scheduledTasksConfigureCmd.Flags()
flags.StringP("cluster", "c", "", requiredSpec+clusterSpec)
viper.BindPFlag("cluster", scheduledTasksConfigureCmd.Flags().Lookup("cluster"))
flags.StringP("task-definition", "T", "", requiredSpec+taskDefinitionSpec)
viper.BindPFlag("task-definition", scheduledTasksConfigureCmd.Flags().Lookup("task-definition"))
flags.String("command", "", "Command to override in the task execution")
viper.BindPFlag("command", scheduledTasksConfigureCmd.Flags().Lookup("command"))
flags.String("expression", "", "Schedule expression (Ex.: 'cron(0 3 * * ? *)' or 'rate(5 minutes)'")
viper.BindPFlag("expression", scheduledTasksConfigureCmd.Flags().Lookup("expression"))
flags.String("state", "", "'disabled' or 'enabled'")
viper.BindPFlag("state", scheduledTasksConfigureCmd.Flags().Lookup("state"))
flags.String("events-role", "ecsEventsRole", "IAM Event Role grants the AWS Event Bridge permission launch AWS Tasks")
viper.BindPFlag("events-role", scheduledTasksConfigureCmd.Flags().Lookup("events-role"))
}