Creating a Cluster and Running a Job

VPC

See operation instructions in VPC > Querying VPCs and VPC > Creating a VPC in the VPC API Reference.

Subnet

See operation instructions in Subnet > Querying Subnets and Subnet > Creating a Subnet in the VPC API Reference.

Key Pair

See operation instructions in ECS SSH Key Management > Querying SSH Key Pairs and ECS SSH Key Management > Creating and Importing an SSH Key Pair in the ECS API Reference.

Zone

Obtain the region and AZ information by referring to Regions and Endpoints.

Version

Currently, MRS 1.8.9, 2.0.1, 3.1.0-LTS.1, and 3.1.2-LTS.3 are supported.

Component

• MRS 3.1.2-LTS.3 supports the following components:
  • The analysis cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, Loader, Flink, Oozie, ZooKeeper, HetuEngine, Ranger, and Tez.
  • The streaming cluster contains the following components: Kafka, Flume, ZooKeeper, and Ranger.
  • The hybrid cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, Loader, Flink, Oozie, ZooKeeper, HetuEngine, Ranger, Tez, Kafka, and Flume.
  • A custom cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, Loader, Kafka, Flume, Flink, Oozie, ZooKeeper, HetuEngine, Ranger, Tez, and ClickHouse.
• MRS 3.1.0-LTS.1 supports the following components:
  • The analysis cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, HetuEngine, Loader, Flink, Oozie, ZooKeeper, Ranger, and Tez.
  • The streaming cluster contains the following components: Kafka, Flume, ZooKeeper, and Ranger.
  • The hybrid cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, HetuEngine, Loader, Flink, Oozie, ZooKeeper, Ranger, Tez, Kafka, and Flume.
  • A custom cluster contains the following components: Hadoop, Spark2x, HBase, Hive, Hue, HetuEngine, Loader, Kafka, Flume, Flink, Oozie, ZooKeeper, Ranger, Tez, and ClickHouse.
• MRS 2.0.1 supports the following components:
  • The analysis cluster contains the following components: Hadoop, Spark, HBase, Hive, Hue, Loader, and Tez.
  • The streaming cluster contains the following components: Kafka, Storm, and Flume.
• MRS 1.8.9 supports the following components:
  • The analysis cluster contains the following components: Presto, Hadoop, Spark, HBase, Opentsdb, Hive, Hue, Loader, and Flink.
  • The streaming cluster contains the following components: Kafka, KafkaManager, Storm, and Flume.

billing_type

Yes

Integer

Cluster billing mode. Set this parameter to 12.

data_center

Yes

String

Region of the cluster. Obtain it by referring to Regions and Endpoints.

available_zone_id

Yes

String

AZ ID. Obtain it by referring to Regions and Endpoints.

cluster_name

Yes

String

Cluster name. It must be unique.

It contains only 1 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.

vpc

Yes

String

Name of the VPC where the subnet locates

Perform the following operations to obtain the VPC name from the VPC management console:

1. Log in to the management console.
2. Click Virtual Private Cloud and select Virtual Private Cloud from the left list.

On the Virtual Private Cloud page, obtain the VPC name from the list.

vpc_id

Yes

String

ID of the VPC where the subnet locates

Perform the following operations to obtain the VPC ID from the VPC management console:

1. Log in to the management console.
2. Click Virtual Private Cloud and select Virtual Private Cloud from the left list.

On the Virtual Private Cloud page, obtain the VPC ID from the list.

subnet_id

Yes

String

Network ID

Perform the following operations to obtain the network ID of the VPC from the VPC management console:

1. Log in to the management console.
2. Click Virtual Private Cloud and select Virtual Private Cloud from the left list.

On the Virtual Private Cloud page, obtain the network ID of the VPC from the list.

subnet_name

Yes

String

Subnet name

Perform the following operations to obtain the subnet name from the VPC management console:

1. Log in to the management console.
2. Click Virtual Private Cloud and select Virtual Private Cloud from the left list.

On the Virtual Private Cloud page, obtain the subnet name of the VPC from the list.

security_groups_id

No

String

Security group ID of the cluster

• If this parameter is left blank, MRS automatically creates a security group, whose name starts with mrs_{cluster_name}.
• If this parameter is not left blank, a fixed security group is used to create a cluster. The transferred ID must be the security group ID owned by the current tenant. The security group must include an inbound rule in which all protocols and all ports are allowed and the source is the IP address of the specified node on the management plane.

tags

No

Array

Cluster tag

• A cluster allows a maximum of 10 tags. A tag name (key) must be unique in a cluster.
• A tag key or value cannot contain the following special characters: =*<>\,|/

cluster_version

Yes

String

Cluster version

Possible values are as follows:

• MRS 1.8.9
• MRS 2.0.1
• MRS 3.1.0-LTS.1
• MRS 3.1.2-LTS.3

cluster_type

No

Integer

Cluster type

• 0: analysis cluster
• 1: streaming cluster
• 2: hybrid cluster

The default value is 0.

safe_mode

Yes

Integer

Running mode of an MRS cluster

• 0: normal cluster. In a normal cluster, Kerberos authentication is disabled, and users can use all functions provided by the cluster.
• 1: security cluster. In a security cluster, Kerberos authentication is enabled, and common users cannot use the file management and job management functions of an MRS cluster or view cluster resource usage and the job records of Hadoop and Spark. To use these functions, the users must obtain the relevant permissions from the MRS Manager administrator.

cluster_admin_secret

Yes

String

Password of the MRS Manager administrator

• Must contain 8 to 32 characters.
• Must contain at least three of the following:
  • Lowercase letters
  • Uppercase letters
  • Digits
  • Special characters: `~!@#$%^&*()-_=+\|[{}];:'",<.>/? and space
• Cannot be the username or the username spelled backwards.

login_mode

Yes

Integer

Cluster login mode

• 0: password
• 1: key pair

The default value is 1.

• If login_mode is set to 0, the request body contains the cluster_master_secret field.
• If login_mode is set to 1, the request body contains the node_public_cert_name field.

cluster_master_secret

No

String

Password of user root for logging in to a cluster node

If login_mode is set to 0, the request body contains the cluster_master_secret field.

A password must meet the following requirements:

• Must be 8 to 26 characters long.
• Must contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (!@$%^-_=+[{}]:,./?), but must not contain spaces.
• Cannot be the username or the username spelled backwards.

node_public_cert_name

No

String

Name of a key pair You can use a key pair to log in to the Master node in the cluster.

If login_mode is set to 1, the request body contains

the node_public_cert_name field.

log_collection

No

Integer

Whether to collect logs when cluster creation fails

• 0: Do not collect.
• 1: Collect.

The default value is 1, indicating that OBS buckets will be created and only used to collect logs that record MRS cluster creation failures.

node_groups

No

Array

List of nodes. For more parameter description, see Table 4.

component_list

Yes

Array

List of service components to be installed. For more parameter description, see Table 7.

add_jobs

No

Array

Jobs can be submitted when a cluster is created. Currently, only one job can be created. For details about job parameters, see Table 8.

bootstrap_scripts

No

Array

Bootstrap action script information. For more parameter description, see Table 15.

MRS 1.7.2 or later supports this parameter.

group_name

Yes

String

Node group name.

• master_node_default_group
• core_node_analysis_group
• core_node_streaming_group
• task_node_analysis_group
• task_node_streaming_group

node_num

Yes

Integer

Number of nodes. The value ranges from 0 to 500 and the default value is 0. The total number of Core and Task nodes cannot exceed 500.

node_size

Yes

String

Instance specification, for example, c6.4xlarge.4.linux.mrs.

You are advised to obtain the value of this parameter from the cluster creation page on the MRS console.

root_volume_size

Yes

String

Data disk storage space of a node.

root_volume_type

Yes

String

System disk storage type of a node. Currently, SATA, SAS, and SSD are supported.

• SATA: Common I/O
• SAS: High I/O
• SSD: Ultra-high I/O

data_volume_type

Yes

String

Data disk storage type of a node. Currently, SATA, SAS, and SSD are supported.

• SATA: Common I/O
• SAS: High I/O
• SSD: Ultra-high I/O

data_volume_count

Yes

Integer

Number of data disks of a node.

Value range: 0 to 10

data_volume_size

Yes

Integer

Data disk storage space of a node.

Value range: 100 GB to 32,000 GB

auto_scaling_policy

No

AutoScalingPolicy

Auto scaling rule information. This parameter is valid only when group_name is set to task_node_analysis_group or task_node_streaming_group. For details, see Table 5.

master_node_num

Yes

Integer

Number of Master nodes. If cluster HA is enabled, set this parameter to 2. If cluster HA is disabled, set this parameter to 1.

This parameter cannot be set to 1 in MRS 3.x.

master_node_size

Yes

String

Instance specifications of the Master node, for example, c6.4xlarge.4.linux.mrs. MRS supports host specifications determined by CPU, memory, and disk space.

You are advised to obtain the value of this parameter from the cluster creation page on the MRS console.

core_node_num

Yes

Integer

Number of Core nodes

Value range: 1 to 500

A maximum of 500 Core nodes are supported by default. If more than 500 Core nodes are required, contact technical support.

core_node_size

Yes

String

Instance specifications of the Core node, for example, c6.4xlarge.4.linux.mrs.

You are advised to obtain the value of this parameter from the cluster creation page on the MRS console.

master_data_volume_type

No

String

This parameter is a multi-disk parameter, indicating the data disk storage type of the Master node. Currently, SATA, SAS, and SSD are supported.

master_data_volume_size

No

Integer

This parameter is a multi-disk parameter, indicating the data disk storage space of the Master node. To increase data storage capacity, you can add disks at the same time when creating a cluster.

Value range: 100 GB to 32,000 GB

master_data_volume_count

No

Integer

This parameter is a multi-disk parameter, indicating the number of data disks of the Master node.

The value can be set to 1 only.

core_data_volume_type

No

String

This parameter is a multi-disk parameter, indicating the data disk storage type of the Core node. Currently, SATA, SAS, and SSD are supported.

core_data_volume_size

No

Integer

This parameter is a multi-disk parameter, indicating the data disk storage space of the Core node. To increase data storage capacity, you can add disks at the same time when creating a cluster.

Value range: 100 GB to 32,000 GB

core_data_volume_count

No

Integer

This parameter is a multi-disk parameter, indicating the number of data disks of the Core node.

Value range: 1 to 10

volume_type

No

String

Data disk storage type of the Master and Core nodes. Currently, SATA, SAS, and SSD are supported. Disk parameters can be represented by volume_type and volume_size, or multi-disk parameters. If the volume_type and volume_size parameters coexist with the multi-disk parameters, the system reads the volume_type and volume_size parameters first. You are advised to use the multi-disk parameters.

• SATA: Common I/O
• SAS: High I/O
• SSD: Ultra-high I/O

volume_size

No

Integer

Data disk storage space of the Master and Core nodes. To increase data storage capacity, you can add disks at the same time when creating a cluster.

Value range: 100 GB to 32,000 GB

This parameter is not recommended. For details, see the description of the volume_type parameter.

task_node_groups

No

Array

List of Task nodes. For more parameter description, see Table 6.

node_num

Yes

Integer

Number of Task nodes. The value ranges from 0 to 500 and the total number of Core and Task nodes cannot exceed 500.

node_size

Yes

String

Instance specifications of the Task node, for example, c6.4xlarge.4.linux.mrs.

You are advised to obtain the value of this parameter from the cluster creation page on the MRS console.

data_volume_type

Yes

String

Data disk storage type of the Task node, supporting SATA, SAS, and SSD currently.

• SATA: Common I/O
• SAS: High I/O
• SSD: Ultra-high I/O

data_volume_count

Yes

Integer

Number of data disks of a Task node

Value range: 0 to 10

data_volume_size

Yes

Integer

Data disk storage space of a Task node

Value range: 100 GB to 32,000 GB

auto_scaling_policy

No

AutoScalingPolicy

Auto scaling policy. For details, see Table 9.

component_name

Yes

String

Component name. For details, see the component information in Table 1.

job_type

Yes

Integer

Job type code

• 1: MapReduce
• 2: Spark
• 3: Hive Script
• 4: HiveQL (not supported currently)
• 5: DistCp, importing and exporting data (not supported currently)
• 6: Spark Script
• 7: Spark SQL, submitting Spark SQL statements (not supported currently).
  NOTE:

  Spark and Hive jobs can be added to only clusters that include Spark and Hive components.

job_name

Yes

String

Job name. It contains 1 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.

jar_path

No

String

Path of the JAR or SQL file for program execution. The parameter must meet the following requirements:

• Contains a maximum of 1023 characters, excluding special characters such as ;|&><'$. The parameter value cannot be empty or full of spaces.
• Files can be stored in HDFS or OBS. The path varies depending on the file system.
  • OBS: The path must start with s3a://. Files or programs encrypted by KMS are not supported.
  • HDFS: The path starts with a slash (/).
• Spark Script must end with .sql while MapReduce and Spark Jar must end with .jar. sql and jar are case-insensitive.

arguments

No

String

Key parameter for program execution. The parameter is specified by the function of the user's program. MRS is only responsible for loading the parameter.

The parameter contains a maximum of 2,047 characters, excluding special characters such as ;|&>'<$, and can be left blank.

input

No

String

Address for inputting data.

The parameter contains a maximum of 1,023 characters, excluding special characters such as ;|&>'<$, and can be left blank.

output

No

String

Address for outputting data.

If the specified path does not exist, the system will automatically create it.

The parameter contains a maximum of 1,023 characters, excluding special characters such as ;|&>'<$, and can be left blank.

job_log

No

String

Path for storing job logs that record job running status.

The parameter contains a maximum of 1,023 characters, excluding special characters such as ;|&>'<$, and can be left blank.

shutdown_cluster

No

Bool

Whether to delete the cluster after the job execution is complete

• true: Yes
• false: No

file_action

No

String

Data import and export

• import
• export

submit_job_once_cluster_run

Yes

Bool

• true: Submit a job during cluster creation.
• false: Submit a job after the cluster is created.

Set this parameter to true in this example.

hql

No

String

HiveQL statement

hive_script_path

Yes

String

SQL program path. This parameter is needed by Spark Script and Hive Script jobs only, and must meet the following requirements:

• Contains a maximum of 1023 characters, excluding special characters such as ;|&><'$. The parameter value cannot be empty or full of spaces.
• Files can be stored in HDFS or OBS. The path varies depending on the file system.
  • OBS: The path must start with s3a://. Files or programs encrypted by KMS are not supported.
  • HDFS: The path starts with a slash (/).
• Ends with .sql. sql is case-insensitive.

auto_scaling_enable

Yes

Boolean

Whether to enable the auto scaling rule.

min_capacity

Yes

Integer

Minimum number of nodes left in the node group.

Value range: 0 to 500

max_capacity

Yes

Integer

Maximum number of nodes in the node group.

Value range: 0 to 500

resources_plans

No

List

Resource plan list. For details, see Table 10. If this parameter is left blank, the resource plan is disabled.

When auto scaling is enabled, either a resource plan or an auto scaling rule must be configured.

exec_scripts

No

List

List of custom scaling automation scripts. For details, see Table 11. If this parameter is left blank, a hook script is disabled.

rules

No

List

List of auto scaling rules. For details, see Table 12.

When auto scaling is enabled, either a resource plan or an auto scaling rule must be configured.

period_type

Yes

String

Cycle type of a resource plan. Currently, only the following cycle type is supported:

• daily

start_time

Yes

String

Start time of a resource plan. The value is in the format of hour:minute, indicating that the time ranges from 0:00 to 23:59.

end_time

Yes

String

End time of a resource plan. The value is in the same format as that of start_time. The interval between end_time and start_time must be greater than or equal to 30 minutes.

min_capacity

Yes

Integer

Minimum number of the preserved nodes in a node group in a resource plan.

Value range: 0 to 500

max_capacity

Yes

Integer

Maximum number of the preserved nodes in a node group in a resource plan.

Value range: 0 to 500

name

Yes

String

Name of a custom automation script. It must be unique in a same cluster.

The value can contain only digits, letters, spaces, hyphens (-), and underscores (_) and cannot start with a space.

The value can contain 1 to 64 characters.

uri

Yes

String

Path of a custom automation script. Set this parameter to an OBS bucket path or a local VM path.

• OBS bucket path: Enter a script path manually, for example, s3a://XXX/scale.sh.
• Local VM path: Enter a script path. The script path must start with a slash (/) and end with .sh.

parameters

No

String

Parameters of a custom automation script.

• Multiple parameters are separated by space.
• The following predefined system parameters can be transferred:
  • ${mrs_scale_node_num}: Number of the nodes to be added or removed
  • ${mrs_scale_type}: Scaling type. The value can be scale_out or scale_in.
  • ${mrs_scale_node_hostnames}: Host names of the nodes to be added or removed
  • ${mrs_scale_node_ips}: IP addresses of the nodes to be added or removed
  • ${mrs_scale_rule_name}: Name of the rule that triggers auto scaling
• Other user-defined parameters are used in the same way as those of common shell scripts. Parameters are separated by space.

nodes

Yes

List<String>

Type of a node where the custom automation script is executed. The node type can be Master, Core, or Task.

active_master

No

Boolean

Whether the custom automation script runs only on the active Master node.

The default value is false, indicating that the custom automation script can run on all Master nodes.

action_stage

Yes

String

Time when a script is executed.

The following four options are supported:

• before_scale_out: before scale-out
• before_scale_in: before scale-in
• after_scale_out: after scale-out
• after_scale_in: after scale-in

fail_action

Yes

String

Whether to continue to execute subsequent scripts and create a cluster after the custom automation script fails to be executed.

• continue: Continue to execute subsequent scripts.
• errorout: Stop the action.
  NOTE:

  • You are advised to set this parameter to continue in the commissioning phase so that the cluster can continue to be installed and started no matter whether the custom automation script is executed successfully.
  • The scale-in operation cannot be undone. Therefore, fail_action must be set to continue for the scripts that are executed after scale-in.

name

Yes

String

Name of an auto scaling rule.

It contains only 1 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.

Rule names must be unique in a node group.

description

No

String

Description about an auto scaling rule.

It contains a maximum of 1024 characters.

adjustment_type

Yes

String

Auto scaling rule adjustment type. The options are as follows:

• scale_out: cluster scale-out
• scale_in: cluster scale-in

cool_down_minutes

Yes

Integer

Cluster cooling time after an auto scaling rule is triggered, when no auto scaling operation is performed. The unit is minute.

Value range: 0 to 10,080. One week is equal to 10,080 minutes.

scaling_adjustment

Yes

Integer

Number of nodes that can be adjusted once.

Value range: 1 to 100

trigger

Yes

Trigger

Condition for triggering a rule. For details, see Table 13.

metric_name

Yes

String

Metric name.

This triggering condition makes a judgment according to the value of the metric.

A metric name contains a maximum of 64 characters.

Table 14 lists the supported metric names.

metric_value

Yes

String

Metric threshold to trigger a rule

The parameter value must be an integer or number with two decimal places only. Table 14 provides value types and ranges corresponding to metric_name.

comparison_operator

No

String

Metric judgment logic operator. The options are as follows:

• LT: less than
• GT: greater than
• LTOE: less than or equal to
• GTOE: greater than or equal to

evaluation_periods

Yes

Integer

Number of consecutive five-minute periods, during which a metric threshold is reached

Value range: 1 to 288

Streaming cluster

StormSlotAvailable

Integer

Number of available Storm slots.

Value range: 0 to 2147483646

StormSlotAvailablePercentage

Percentage

Percentage of available Storm slots, that is, the proportion of the available slots to total slots.

Value range: 0 to 100

StormSlotUsed

Integer

Number of the used Storm slots.

Value range: 0 to 2147483646

StormSlotUsedPercentage

Percentage

Percentage of the used Storm slots, that is, the proportion of the used slots to total slots.

Value range: 0 to 100

StormSupervisorMemAverageUsage

Integer

Average memory usage of the Supervisor process of Storm.

Value range: 0 to 2147483646

StormSupervisorMemAverageUsagePercentage

Percentage

Average percentage of the used memory of the Supervisor process of Storm to the total memory of the system.

Value range: 0 to 100

StormSupervisorCPUAverageUsagePercentage

Percentage

Average percentage of the used CPUs of the Supervisor process of Storm to the total CPUs.

Value range: 0 to 6000

Analysis cluster

YARNAppPending

Integer

Number of pending tasks on Yarn.

Value range: 0 to 2147483646

YARNAppPendingRatio

Ratio

Ratio of pending tasks on Yarn, that is, the ratio of pending tasks to running tasks on Yarn.

Value range: 0 to 2147483646

YARNAppRunning

Integer

Number of running tasks on Yarn.

Value range: 0 to 2147483646

YARNContainerAllocated

Integer

Number of containers allocated to Yarn.

Value range: 0 to 2147483646

YARNContainerPending

Integer

Number of pending containers on Yarn.

Value range: 0 to 2147483646

YARNContainerPendingRatio

Ratio

Ratio of pending containers on Yarn, that is, the ratio of pending containers to running containers on Yarn.

Value range: 0 to 2147483646

YARNCPUAllocated

Integer

Number of virtual CPUs (vCPUs) allocated to Yarn

Value range: 0 to 2147483646

YARNCPUAvailable

Integer

Number of available vCPUs on Yarn.

Value range: 0 to 2147483646

YARNCPUAvailablePercentage

Percentage

Percentage of available vCPUs on Yarn, that is, the proportion of available vCPUs to total vCPUs.

Value range: 0 to 100

YARNCPUPending

Integer

Number of pending vCPUs on Yarn.

Value range: 0 to 2147483646

YARNMemoryAllocated

Integer

Memory allocated to Yarn. The unit is MB.

Value range: 0 to 2147483646

YARNMemoryAvailable

Integer

Available memory on Yarn. The unit is MB.

Value range: 0 to 2147483646

YARNMemoryAvailablePercentage

Percentage

Percentage of available memory on Yarn, that is, the proportion of available memory to total memory on Yarn.

Value range: 0 to 100

YARNMemoryPending

Integer

Pending memory on Yarn.

Value range: 0 to 2147483646

name

Yes

String

Name of a bootstrap action script. It must be unique in a cluster.

The value can contain only digits, letters, spaces, hyphens (-), and underscores (_) and cannot start with a space.

The value can contain 1 to 64 characters.

uri

Yes

String

Path of a Bootstrap action script. Set this parameter to an OBS bucket path or a local VM path.

• OBS bucket path: Enter a script path manually. For example, enter the path of the public sample script provided by MRS. Example: s3a://bootstrap/presto/presto-install.sh. If dualroles is installed, the parameter of the presto-install.sh script is dualroles. If worker is installed, the parameter of the presto-install.sh script is worker. Based on the Presto usage habit, you are advised to install dualroles on the active Master nodes and worker on the Core nodes.
• Local VM path: Enter a script path. The script path must start with a slash (/) and end with .sh.

parameters

No

String

Bootstrap action script parameters.

nodes

Yes

Array String

Type of a node where the Bootstrap action script is executed. The value can be Master, Core, or Task.

active_master

No

Boolean

Whether the Bootstrap action script runs only on active Master nodes.

The default value is false, indicating that the Bootstrap action script can run on all Master nodes.

before_component_start

No

Boolean

Time when the bootstrap action script is executed. Currently, the following two options are available: Before component start and After component start

The default value is false, indicating that the bootstrap action script is executed after the component is started.

fail_action

Yes

String

Whether to continue executing subsequent scripts and creating a cluster after the Bootstrap action script fails to be executed.

• continue: Continue to execute subsequent scripts.
• errorout: Stop the action.

cluster_id

String

Cluster ID, which is returned by the system after the cluster is created.

result

Bool

Operation result.

• true: The operation is successful.
• false: The operation failed.

msg

String

System message, which can be empty.

200

The cluster has been successfully created.