Help Center/ ServiceStage/ API Reference/ Application Management V3 APIs/ Component/ Creating an Application Component

Updated on 2024-10-16 GMT+08:00

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Creating an Application Component

Function

A component is a service feature implementation of an application. It is carried by code or software packages and can be independently deployed and run in an environment.

This API is used to create an application component.

URI

POST /v3/{project_id}/cas/applications/{application_id}/components

**Table 1** Path parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Tenant's project ID. See Obtaining a Project ID.
application_id	Yes	String	Application ID. See Obtaining All Applications.

Request

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
Content-Type	Yes	String	Message body type (format). Default value: application/json;charset=utf8.
X-Auth-Token	Yes	String	API calling can be authenticated using a token or AK/SK. If you use a token, this parameter is mandatory and must be set to the token. For details about how to obtain a token, see Obtaining a User Token.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
name	Yes	String	Component name. The value contains 2 to 64 characters consisting of letters, digits, hyphens (-), or underscores (_). It starts with a letter and ends with a letter or digit.
labels	No	Array of objects	Label. For container-deployed components, you can query a workload by label. For VM-deployed components, you can configure a label of the corresponding microservice name to use graceful startup and shutdown. See Table 4. NOTE: Labels can be set in CN East2.
runtime_stack	Yes	Object	Runtime. See Table 29. The value can be obtained from the response of the API for Querying a Runtime System Stack.
environment_id	No	String	Environment ID, which can be obtained from the information returned by Obtaining All Environments.
description	No	String	Component description. The value can contain up to 128 characters.
source	Yes	Object	Source of the code or software package. See Table 30.
build	No	Object	Component building. This parameter is mandatory when the component is deployed in containers and no image is used. For details, see Table 31.
limit_cpu	No	Number	Maximum CPU limit. Unit: core.
limit_memory	No	Number	Maximum memory size. Unit: GiB.
request_cpu	No	Number	Requested CPU resources. Unit: core.
request_memory	No	Number	Requested memory. Unit: GiB.
version	Yes	String	Component version number. The value can contain up to 32 characters. It needs to meet the following rule: ^([0-9]+)(.[0-9]+){2,3}$
envs	No	Array of objects	Environment variable list. See Table 27.
replica	Yes	Integer	Number of instances.
storages	No	Array of objects	Storage. See Table 5.
deploy_strategy	No	Object	Component deployment. See Table 8.
command	No	Object	Startup command. See Table 11.
post_start	No	Object	Post-start processing. See Table 12.
pre_stop	No	Object	Pre-stop processing. See Table 12.
mesher	No	Object	Multi-language access service mesh. This parameter is mandatory when Node.js is selected for the technology stack and the CSE engine is bound. See Table 13.
timezone	No	String	Time zone where the component runs. Example: Asia/Shanghai.
jvm_opts	No	String	JVM parameter. Example: -Xms256m -Xmx1024m. If there are multiple parameters, separate them by spaces. If the parameter is left blank, the default value is used.
tomcat_opts	No	Object	Tomcat parameter. This parameter is valid when you use the Tomcat technology stack. See Table 14.
logs	No	Array of objects	Log collection. See Table 20.
custom_metric	No	Object	Custom metrics. See Table 21.
affinity	No	Array of objects	Affinity. See Table 22.
anti_affinity	No	Array of objects	Anti-affinity. See Table 22.
liveness_probe	No	Object	Component liveness probe. See Table 24.
readiness_probe	No	Object	Component service probe. See Table 24.
refer_resources	Yes	Array of objects	Associated resource. See Table 25.
external_accesses	No	Array of objects	External access. See Table 33.

**Table 4** labels
Parameter	Mandatory	Type	Description
key	Yes	String	Label name. The value contains 1 to 36 characters, including digits, letters, underscores (_), or hyphens (-). NOTICE: The value of Key cannot be the built-in app, casid, or version of the system. Otherwise, an error will be reported during component creation and deployment.
value	Yes	String	Label value. The value contains 0 to 43 characters, including digits, letters, underscores (_), periods (.), or hyphens (-).

**Table 5** storages
Parameter	Mandatory	Type	Description
type	Yes	String	Data storage type. HostPath: host path for local disk mounting. EmptyDir: temporary directory for local disk mounting. ConfigMap: configuration item for local disk mounting. Secret: secrets for local disk mounting. PersistentVolumeClaim: cloud storage mounting.
name	Yes	String	Name of the storage disk.
parameters	Yes	Object	For details about the parameters of each data storage type, see Table 6.
mounts	Yes	Array of objects	Mount path of data storage. See Table 7.

**Table 6** component_storage_parameters
Parameter	Mandatory	Type	Description
path	No	String	Host path. This parameter is applicable to the HostPath storage type. This parameter is mandatory when type is set to HostPath.
name	No	String	Name of a configuration item, secret, or PVC, which is applicable to ConfigMap, Secret, or PersistentVolumeClaim storage, respectively. This parameter is mandatory when type is set to ConfigMap, Secret, or PersistentVolumeClaim.
default_mode	No	Integer	Mounting permission. The value is in decimal format. Example: 384. This parameter is applicable to ConfigMap and secret storage.
medium	No	String	This parameter is applicable to EmptyDir storage. If it is not specified, the default disk medium is used. If it is set to memory, memory storage is enabled.

**Table 7** mounts
Parameter	Mandatory	Type	Description
path	Yes	String	Application path to which the data storage is mounted. Example: /tmp.
sub_path	Yes	String	Subpath of the mount path.
read_only	Yes	Boolean	Read-only or not. true: read-only. false: read and write. You can modify data volumes in the application path. To prevent data loss, newly written data will not be migrated during application migration.

**Table 8** deploy_strategy
Parameter	Mandatory	Type	Description
type	Yes	String	Deployment type. OneBatchRelease: single-batch upgrade. RollingRelease: rolling deployment and upgrade. GrayRelease: dark launch upgrade.
rolling_release	No	Object	Rolling deployment parameter, which is mandatory when type is set to RollingRelease. For details, see Table 9.
gray_release	No	Object	Dark launch upgrade parameter, which is mandatory when type is set to GrayRelease. For details, see Table 10.

**Table 9** rolling_release
Parameter	Mandatory	Type	Description
batches	Yes	Integer	Deployment batches.

**Table 10** gray_release
Parameter	Mandatory	Type	Description
type	Yes	String	Dark launch policy. weight: The upgrade is performed based on dark launch traffic.
first_batch_weight	Yes	Integer	Proportion of first-batch dark launch traffic.
first_batch_replica	Yes	Integer	Number of first-batch dark launch instances.
remaining_batch	Yes	Integer	Number of batches for remaining instance deployment. After the first batch is completed, the remaining instances will be deployed in specified batches. Example: If there are 5 instances remaining to be deployed in 3 batches, these 5 instances will be upgraded based on 2:2:1.

**Table 11** command
Parameter	Mandatory	Type	Description
command	No	Array of String	Command for controlling container running.
args	No	Array of String	Parameter for controlling container running. Example: -port=8080. If there are multiple parameters, separate them by line breaks.

**Table 12** component_lifecycle
Parameter	Mandatory	Type	Description
type	Yes	String	Processing method. http command
scheme	No	String	HTTP request type, which can be HTTP or HTTPS. This parameter is valid only when type is set to http.
host	No	String	Custom IP address. If this parameter is left blank, the pod IP address is used. This parameter is valid only when type is set to http.
port	No	Integer	Port number. This parameter is valid only when type is set to http.
path	No	String	Request path. This parameter is valid only when type is set to http.
command	No	Array of String	Command list. This parameter is valid only when type is set to command.

**Table 13** mesher
Parameter	Mandatory	Type	Description
port	Yes	Integer	Process listening port.

**Table 14** tomcat_opt
Parameter	Mandatory	Type	Description
server_xml	Yes	String	Listening port in the server.xml file will take effect even if it has been configured in public network access. The custom Tomcat configuration may conflict with the existing port. Check whether the custom port is occupied.

**Table 15** host_aliases
Parameter	Mandatory	Type	Description
ip	Yes	String	IP address.
hostname	Yes	Array of String	Host alias.

**Table 16** dns_config
Parameter	Mandatory	Type	Description
nameservers	No	Array of String	IP address list of the DNS server of the pod.
searches	No	Array of String	(Optional) List of DNS search domains used to search for host names in the pod.
options	No	Array of objects	(Optional) List of objects. Each object may have a name (mandatory) and a value (optional). The contents of the objects here will be merged into the options generated from the specified DNS policy. Duplicate entries will be deleted. See Table 17.

**Table 17** options
Parameter	Mandatory	Type	Description
name	Yes	String	Operation name.
value	No	String	Operation value.

**Table 18** security_context
Parameter	Mandatory	Type	Description
run_as_user	No	Integer	User for running containers. Example: To run containers as user root, set the user ID to 0.
run_as_group	No	Integer	Owner group specified for running container processes.
capabilities	No	Object	Capability set. See Table 19.

**Table 19** capabilities
Parameter	Mandatory	Type	Description
add	No	Array of String	Grant the Linux permission to the running user.
drop	No	Array of String	Remove the Linux permission of the running user.

**Table 20** logs
Parameter	Mandatory	Type	Description
log_path	Yes	String	Container log path.
rotate	Yes	String	Interval for dumping logs.
host_path	Yes	String	Mounted host path.
host_extend_path	Yes	String	Host extension path. By extending the host path, you can distinguish mounting from different containers in the same host path. None: the extended path is not used. PodUID: extend the host path based on the pod ID. PodName: extend the host path based on the pod name. PodUID/ContainerName: extend the host path based on the pod ID and container name. PodName/ContainerName: extend the host path based on the pod name and container name.

**Table 21** custom_metric
Parameter	Mandatory	Type	Description
path	Yes	String	Collection path. Example: /metrics.
port	Yes	Integer	Collection port. Example: 9090.
dimensions	Yes	String	Monitoring dimension. Example: cpu_usage,mem_usage.

**Table 22** component_affinity
Parameter	Mandatory	Type	Description
condition	Yes	String	Whether the condition must be met. required: The condition must be met. preferred: The condition is met as much as possible.
kind	Yes	String	Affinity type. node pod
weight	No	Integer	Affinity weight. Value range: 0–100.
match_expressions	Yes	Array of objects	Match condition. See Table 23.

**Table 23** match_expressions
Parameter	Mandatory	Type	Description
key	Yes	String	Key of the match tag.
operation	Yes	String	Match condition.
value	Yes	String	Value of the match tag.

**Table 24** component_probe
Parameter	Mandatory	Type	Description
type	Yes	String	Type. Value: http, tcp, or command.
delay	Yes	Integer	Interval between the startup and detection.
timeout	Yes	Integer	Detection timeout interval.
scheme	No	String	Request type. Value: HTTP or HTTPS. This parameter is valid only when type is set to http.
host	No	String	Custom IP address. If this parameter is left blank, the pod IP address is used. This parameter is valid only when type is set to http.
port	No	Integer	Port number. This parameter is valid only when type is set to http or tcp.
path	No	String	Request path. This parameter is valid only when type is set to http.
command	No	Array of String	Command list. This parameter is valid only when type is set to command.

**Table 25** refer_resources
Parameter	Mandatory	Type	Description
id	Yes	String	Resource ID.
type	Yes	String	Resource type. vpc eip elb cce ecs as cse dcs rds
parameters	No	Object	Resource parameters. See Table 26.

**Table 26** refer_resource_parameter
Parameter	Mandatory	Type	Description
namespace	No	String	Namespace.

**Table 27** env
Parameter	Mandatory	Type	Description
name	Yes	String	Variable name.
value	No	String	Variable value.
value_from	No	Object	Variable reference. See Table 28.

**Table 28** value_from
Parameter	Mandatory	Type	Description
reference_type	Yes	String	Reference type. configMapKey secretKey
name	Yes	String	Name of the configuration item or secret.
key	No	String	Key of the configuration item or secret.
optional	No	Boolean	Whether the key of the configuration item or secret is mandatory.

**Table 29** runtime_stack
Parameter	Mandatory	Type	Description
name	Yes	String	Technology stack name.
type	Yes	String	Technology stack type. Value: Java, Tomcat, Nodejs, Php, Docker, or Python. When deploy_mode is set to virtualmachine, only Java, Tomcat, and Node.js are supported. When deploy_mode is set to container, all of the preceding types are supported.
version	Yes	String	Technology stack version.
deploy_mode	Yes	String	Deployment mode. container virtualmachine

**Table 30** source
Parameter	Mandatory	Type	Description
kind	Yes	String	Component source kind. code package image
version	No	String	Version number.
url	No	String	Package address. This parameter is mandatory when kind is set to package or image.
storage	No	String	Storage mode. Value: swr (image), swr(software repository), codearts, or obs. This parameter is mandatory when kind is set to package or image.
auth	No	String	Authentication mode. Value: iam or none. Default value: iam.
repo_auth	No	String	Authorization name, which can be obtained from the authorization list. For details, see Obtaining a Git Repository Authorization List.
repo_namespace	No	String	Namespace of the code repository.
repo_ref	No	String	Code branch or tag. Default value: master.
repo_type	No	String	Code repository type. Value: GitHub, BitBucket, or GitLab.
web_url	No	String	Code redirection URL. Example: https://github.com/example/demo.git.
repo_url	No	String	Code repository URL. Example: https://github.com/example/demo.git.
commit_id	No	String	In the code repository, commit ID is the unique identifier of each commit and is used to identify and reference a commit. The value contains 8 to 40 characters and starts with a lowercase letter or digit.

**Table 31** build
Parameter	Mandatory	Type	Description
parameters	No	Map<String, Object>	This parameter is provided only when no ID is available during build creation. See Table 32.

**Table 32** parameters
Parameter	Mandatory	Type	Description
build_cmd	No	String	Compilation command. By default: When build.sh exists in the root directory, the command is ./build.sh. When build.sh does not exist in the root directory, the command varies depending on the OS. Example: Java and Tomcat: mvn clean package Node.js: npm build
dockerfile_path	No	String	Address of the Docker file. By default, the Docker file is in the root directory (./).
artifact_namespace	No	String	Build archive organization. Default value: cas_{project_id}.
cluster_id	Yes	String	ID of the cluster to be built.
node_label_selector	No	Map<String, String>	key: label key. value: label value.
environment_id	No	String	Environment ID. See Obtaining All Environments.

**Table 33** external_accesses
Parameter	Mandatory	Type	Description
protocol	No	String	External access type. Value: http or https.
address	No	String	External access address.
forward_port	No	Integer	External access port.

Response

**Table 34** Response parameters
Parameter	Type	Description
job_id	String	Job ID.
component_id	String	Application component ID.

Example Request

Scenario 1: Create a component in the CCE container environment

Create a component named mycomponent. The technology stack is Java 1.2.0. The component source is the weather-1.0.0.jar package stored in the bucket00001 bucket of OBS. The resource used for deployment is the CCE whose ID is fd92bfab-73b3-11ee-90f0-0255ac1001b3.

{
    "name": "mycomponent",
    "description": "",
    "labels": [
        {
            "key": "com-key",
            "value": "com-value"
        }
    ],
    "version": "2023.1102.17105",
    "environment_id": "b489f7b4-2539-45a1-ba71-4728961434ca",
    "runtime_stack": {
        "name": "OpenJDK8",
        "version": "1.2.0",
        "type": "Java",
        "deploy_mode": "container"
    },
    "source": {
        "kind": "package",
        "url": "obs://bucket0001/weather-1.0.0.jar",
        "version": "",
        "storage": "obs"
    },
    "tomcat_opts": {
        "server_xml": ""
    },
    "refer_resources": [
        {
            "id": "fd92bfab-73b3-11ee-90f0-0255ac1001b3",
            "type": "cce",
        }
    ],
    "replica": 1,
    "limit_cpu": 0.25,
    "limit_memory": 0.5,
    "request_cpu": 0.25,
    "request_memory": 0.5
}

Scenario 2: Create a component in the ECS VM environment

Create a component named mycomponent. The technology stack is Java 1.2.0. The component source is the weather-1.0.0.jar package stored in the bucket00001 bucket of OBS. The resource used for deployment is the ECS whose ID is 67835bb3-1235-4cc9-be71-becbb2b4ca0d.

{
    "name": "mycomponent",
    "description": "",
    "labels": [
        {
            "key": "com-key",
            "value": "com-value"
        }
    ],
    "version": "2023.1102.17540",
    "environment_id": "9a075df5-104f-4e21-9dbf-ffc3572effdf",
    "runtime_stack": {
        "name": "OpenJDK8",
        "version": "1.2.0",
        "type": "Java",
        "deploy_mode": "virtualmachine"
    },
    "source": {
        "kind": "package",
        "url": "obs://bucket0001/weather-1.0.0.jar",
        "version": "",
        "storage": "obs"
    },
    "tomcat_opts": {
        "server_xml": ""
    },
    "refer_resources": [
        {
            "id": "23598aa9-7a6b-43c7-a53a-39ca5e7290fb",
            "type": "ecs"
        }
    ],
    "replica": 1,
    "external_accesses": [
        {
            "protocol": "http",
            "address": "192.168.0.169",
            "forward_port": 80
        }
    ]
}

Example Response

{
    "job_id": "JOB8be53b2a-af9a-4e2b-8505-096688a52237",
    "component_id": "b8702b0f-94d3-4822-98a1-56815632a0a0"
}

Status Code

Status Code	Description
200	OK
400	Bad Request
404	Not Found
500	Internal Server Error

Error Code

The error code format is SVCSTG.00100.[Error_ID], for example, SVCSTG.00100400. For details, see ServiceStage Error Codes.

Parent topic: Component

Previous topic: Component

Next topic: Obtaining All Components of an Application

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