kubevela.github.io/docs/end-user/components/references.md

title
Built-in Component Type

This documentation will walk through the built-in component types.

Webservice

Description

Describes long-running, scalable, containerized services that have a stable network endpoint to receive external network traffic from customers.

Properties

Name	Description	Type	Required	Default
cmd	Commands to run in the container	[]string	false
env	Define arguments by using environment variables	[]env	false
volumeMounts		volumeMounts	false
labels	Specify the labels in the workload	map[string]string	false
annotations	Specify the annotations in the workload	map[string]string	false
image	Which image would you like to use for your service	string	true
ports	Which ports do you want customer traffic sent to	[]ports	false
imagePullPolicy	Specify image pull policy for your service. Should be "Always","Never" or "IfNotPresent".	string	false
cpu	Number of CPU units for the service, like 0.5 (0.5 CPU core), 1 (1 CPU core)	string	false
memory	Specifies the attributes of the memory resource required for the container.	string	false
livenessProbe	Instructions for assessing whether the container is alive.	livenessProbe	false
readinessProbe	Instructions for assessing whether the container is in a suitable state to serve traffic.	readinessProbe	false
imagePullSecrets	Specify image pull secrets for your service	[]string	false
hostAliases	Specify the hostAliases to add	[]hostAliases	true

readinessProbe

Name	Description	Type	Required	Default
exec	Instructions for assessing container health by executing a command. Either this attribute or the httpGet attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the httpGet attribute and the tcpSocket attribute.	exec	false
httpGet	Instructions for assessing container health by executing an HTTP GET request. Either this attribute or the exec attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the tcpSocket attribute.	httpGet	false
tcpSocket	Instructions for assessing container health by probing a TCP socket. Either this attribute or the exec attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the httpGet attribute.	tcpSocket	false
initialDelaySeconds	Number of seconds after the container is started before the first probe is initiated.	int	true	0
periodSeconds	How often, in seconds, to execute the probe.	int	true	10
timeoutSeconds	Number of seconds after which the probe times out.	int	true	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	true	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	true	3

tcpSocket

Name	Description	Type	Required	Default
port	The TCP socket within the container that should be probed to assess container health.	int	true

httpGet

Name	Description	Type	Required	Default
path	The endpoint, relative to the port, to which the HTTP GET request should be directed.	string	true
port	The TCP socket within the container to which the HTTP GET request should be directed.	int	true
httpHeaders		[]httpHeaders	false

httpHeaders

Name	Description	Type	Required	Default
name		string	true
value		string	true

exec

Name	Description	Type	Required	Default
command	A command to be executed inside the container to assess its health. Each space delimited token of the command is a separate array element. Commands exiting 0 are considered to be successful probes, whilst all other exit codes are considered failures.	[]string	true

hostAliases

Name	Description	Type	Required	Default
ip		string	true
hostnames		[]string	true

livenessProbe

Name	Description	Type	Required	Default
hostAliases	Specify the hostAliases to add	[]hostAliases	true
exec	Instructions for assessing container health by executing a command. Either this attribute or the httpGet attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the httpGet attribute and the tcpSocket attribute.	exec	false
httpGet	Instructions for assessing container health by executing an HTTP GET request. Either this attribute or the exec attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the tcpSocket attribute.	httpGet	false
tcpSocket	Instructions for assessing container health by probing a TCP socket. Either this attribute or the exec attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the httpGet attribute.	tcpSocket	false
initialDelaySeconds	Number of seconds after the container is started before the first probe is initiated.	int	true	0
periodSeconds	How often, in seconds, to execute the probe.	int	true	10
timeoutSeconds	Number of seconds after which the probe times out.	int	true	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	true	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	true	3

ports

Name	Description	Type	Required	Default
name	Name of the port	string	false
port	Number of port to expose on the pod's IP address	int	true
protocol	Protocol for port. Must be UDP, TCP, or SCTP	string	true	TCP
expose	Specify if the port should be exposed	bool	true	false

volumeMounts

Name	Description	Type	Required	Default
pvc	Mount PVC type volume	[]pvc	false
configMap	Mount ConfigMap type volume	[]configMap	false
secret	Mount Secret type volume	[]secret	false
emptyDir	Mount EmptyDir type volume	[]emptyDir	false
hostPath	Mount HostPath type volume	[]hostPath	false

hostPath

Name	Description	Type	Required	Default
path		string	true
name		string	true
mountPath		string	true

emptyDir

Name	Description	Type	Required	Default
name		string	true
mountPath		string	true
medium		string	true	empty

secret

Name	Description	Type	Required	Default
name		string	true
mountPath		string	true
defaultMode		int	true	420
items		[]items	false
secretName		string	true

items

Name	Description	Type	Required	Default
path		string	true
key		string	true
mode		int	true	511

configMap

Name	Description	Type	Required	Default
name		string	true
mountPath		string	true
defaultMode		int	true	420
cmName		string	true
items		[]items	false

items

Name	Description	Type	Required	Default
path		string	true
key		string	true
mode		int	true	511

pvc

Name	Description	Type	Required	Default
name		string	true
mountPath		string	true
claimName	The name of the PVC	string	true

env

Name	Description	Type	Required	Default
name	Environment variable name	string	true
value	The value of the environment variable	string	false
valueFrom	Specifies a source the value of this var should come from	valueFrom	false

valueFrom

Name	Description	Type	Required	Default
secretKeyRef	Selects a key of a secret in the pod's namespace	secretKeyRef	false
configMapKeyRef	Selects a key of a config map in the pod's namespace	configMapKeyRef	false

configMapKeyRef

Name	Description	Type	Required	Default
name	The name of the config map in the pod's namespace to select from	string	true
key	The key of the config map to select from. Must be a valid secret key	string	true

secretKeyRef

Name	Description	Type	Required	Default
name	The name of the secret in the pod's namespace to select from	string	true
key	The key of the secret to select from. Must be a valid secret key	string	true

Examples

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: website
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: oamdev/testapp:v1
        cmd: ["node", "server.js"]
        port: 8080
        cpu: "0.1"
        env:
          - name: FOO
            value: bar
          - name: FOO
            valueFrom:
              secretKeyRef:
                name: bar
                key: bar

Worker

Describes long-running, scalable, containerized services that running at backend. They do NOT have network endpoint to receive external network traffic.

Parameters

NAME	DESCRIPTION	TYPE	REQUIRED	DEFAULT
cmd	Commands to run in the container	[]string	false
env	Define arguments by using environment variables	[]env	false
image	Which image would you like to use for your service	string	true
imagePullPolicy	Specify image pull policy for your service. Should be "Always","Never" or "IfNotPresent".	string	false
cpu	Number of CPU units for the service, like 0.5 (0.5 CPU core), 1 (1 CPU core)	string	false
memory	Specifies the attributes of the memory resource required for the container.	string	false
volumeMounts		volumeMounts	false
livenessProbe	Instructions for assessing whether the container is alive.	livenessProbe	false
readinessProbe	Instructions for assessing whether the container is in a suitable state to serve traffic.	readinessProbe	false
imagePullSecrets	Specify image pull secrets for your service	[]string	false

Examples

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: app-worker
spec:
  components:
    - name: myworker
      type: worker
      properties:
        image: "busybox"
        cmd:
          - sleep
          - "1000"

Task

Describes jobs that run code or a script to completion.

Parameters

NAME	DESCRIPTION	TYPE	REQUIRED	DEFAULT
cmd	Commands to run in the container	[]string	false
env	Define arguments by using environment variables	[]env	false
count	Specify number of tasks to run in parallel	int	true	1
restart	Define the job restart policy, the value can only be Never or OnFailure. By default, it's Never.	string	true	Never
image	Which image would you like to use for your service	string	true
cpu	Number of CPU units for the service, like 0.5 (0.5 CPU core), 1 (1 CPU core)	string	false
memory	Specifies the attributes of the memory resource required for the container.	string	false
volumeMounts		volumeMounts	false
livenessProbe	Instructions for assessing whether the container is alive.	livenessProbe	false
readinessProbe	Instructions for assessing whether the container is in a suitable state to serve traffic.	readinessProbe	false
labels	Specify the labels in the workload	[]string	false
annotations	Specify the annotations in the workload	[]string	false
imagePullPolicy	Specify image pull policy for your service	string	false
imagePullSecrets	Specify image pull secrets for your service	[]string	false

Examples

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: app-worker
spec:
  components:
    - name: mytask
      type: task
      properties:
        image: perl
        count: 10
        cmd: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]

Cron Task

Describes cron jobs that run code or a script to completion.

Parameters

NAME	DESCRIPTION	TYPE	REQUIRED	DEFAULT
cmd	Commands to run in the container	[]string	false
env	Define arguments by using environment variables	[]env	false
schedule	Specify the schedule in Cron format	string	true
suspend	Suspend subsequent executions	bool	false	false
concurrencyPolicy	Specifies how to treat concurrent executions of a Job	string	false	Allow
successfulJobsHistoryLimit	The number of successful finished jobs to retain	int	false	3
failedJobsHistoryLimit	The number of failed finished jobs to retain	int	false	1
count	Specify number of tasks to run in parallel	int	true	1
restart	Define the job restart policy, the value can only be Never or OnFailure. By default, it's Never.	string	true	Never
image	Which image would you like to use for your service	string	true
cpu	Number of CPU units for the service, like 0.5 (0.5 CPU core), 1 (1 CPU core)	string	false
memory	Specifies the attributes of the memory resource required for the container.	string	false
volumeMounts		volumeMounts	false
livenessProbe	Instructions for assessing whether the container is alive.	livenessProbe	false
readinessProbe	Instructions for assessing whether the container is in a suitable state to serve traffic.	readinessProbe	false
labels	Specify the labels in the workload	[]string	false
annotations	Specify the annotations in the workload	[]string	false
imagePullPolicy	Specify image pull policy for your service	string	false
imagePullSecrets	Specify image pull secrets for your service	[]string	false

Examples

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: cron-worker
spec:
  components:
    - name: mytask
      type: cron-task
      properties:
        image: perl
        count: 10
        cmd: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]
        schedule: "*/1 * * * *"

k8s-objects

参数说明

NAME	DESCRIPTION	TYPE	REQUIRED	DEFAULT
objects	Kubernetes resource manifest	[]K8s-Object	true

k8s-object

A kubernetes plane manifest.

Examples

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: app-raw
spec:
  components:
    - name: myjob
      type: k8s-objects
      properties:
        objects:
        - apiVersion: batch/v1
          kind: Job
          metadata:
            name: pi
          spec:
            template:
              spec:
                containers:
                - name: pi
                  image: perl
                  command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]
                restartPolicy: Never
            backoffLimit: 4