Version: Next

Built-in Trait Type

This documentation will walk through all the built-in trait types sorted alphabetically.

It was generated automatically by scripts, please don't update manually, last updated at 2022-11-24T12:21:19+08:00.

Affinity

Description

Affinity specifies affinity and toleration K8s pod for your workload which follows the pod spec in path 'spec.template'.

For now this trait is hidden from the VelaUX. Available when using CLI

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (affinity)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          label-key: label-value
          to-delete-label-key: to-delete-label-value
      traits:
        - type: affinity
          properties:
            podAffinity:
              preferred:
                - weight: 1
                  podAffinityTerm:
                    labelSelector:
                      matchExpressions:
                        - key: "secrity"
                          values: ["S1"]
                    namespaces: ["default"]
                    topologyKey: "kubernetes.io/hostname"

Specification (affinity)

Name	Description	Type	Required
podAffinity	Specify the pod affinity scheduling rules.	podAffinity	false
podAntiAffinity	Specify the pod anti-affinity scheduling rules.	podAntiAffinity	false
nodeAffinity	Specify the node affinity scheduling rules for the pod.	nodeAffinity	false
tolerations	Specify tolerant taint.	[]tolerations	false

podAffinity (affinity)

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	[]required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

required (affinity)

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

labelSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

namespaceSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

preferred (affinity)

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding podAffinityTerm.	int	true
podAffinityTerm	Specify a set of pods.	podAffinityTerm	true

podAffinityTerm (affinity)

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

labelSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

namespaceSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

podAntiAffinity (affinity)

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	[]required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

required (affinity)

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

labelSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

namespaceSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

preferred (affinity)

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding podAffinityTerm.	int	true
podAffinityTerm	Specify a set of pods.	podAffinityTerm	true

podAffinityTerm (affinity)

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

labelSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

namespaceSelector (affinity)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		[]matchExpressions	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

nodeAffinity (affinity)

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

required (affinity)

Name	Description	Type	Required	Default
nodeSelectorTerms	Specify a list of node selector.	[]nodeSelectorTerms	true

nodeSelectorTerms (affinity)

Name	Description	Type	Required	Default
matchExpressions		[]matchExpressions	false
matchFields		[]matchFields	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

matchFields (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

preferred (affinity)

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding nodeSelector.	int	true
preference	Specify a node selector.	preference	true

preference (affinity)

Name	Description	Type	Required	Default
matchExpressions		[]matchExpressions	false
matchFields		[]matchFields	false

matchExpressions (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

matchFields (affinity)

Name	Type	Required	Default
key	string	true
operator	string	false	In
values	[]string	false

tolerations (affinity)

Name	Description	Type	Required	Default
key		string	false
operator		string	false	Equal
value		string	false
effect		string	false
tolerationSeconds	Specify the period of time the toleration.	int	false

Annotations

Description

Add annotations on your workload. if it generates pod, add same annotations for generated pods.

Apply To Component Types

All Component Types

Examples (annotations)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: myapp
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: labels
          properties:
            "release": "stable"
        - type: annotations
          properties:
            "description": "web application"

Specification (annotations)

Name	Description	Type	Required	Default
-		map[string]:(null\|string)	true

Command

Description

Add command on K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (command)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: command
          properties:
            # you can use command to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                command: ["sleep", "8640000"]
              - containerName: sidecar-nginx
                args: ["-q"]

Specification (command)

Name	Description	Type	Required	Default
--	Composition type.	parameter: cannot use value {containerName:"" \| string,command:null \| [],args:null \| [],addArgs:null \| [],delArgs:*null \| []} (type struct) as string	false

Container-Image

Description

Set the image of the container.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (container-image)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: container-image
          properties:
            # you can use container-image to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                image: busybox-1.34.0
                imagePullPolicy: IfNotPresent
              - containerName: sidecar-nginx
                image: nginx-1.20

Specification (container-image)

Name	Description	Type	Required	Default
--	Composition type.	parameter: cannot use value {containerName:"" \| string,image:string,imagePullPolicy:"" \| "IfNotPresent" \| "Always" \| "Never"} (type struct) as string	false

Cpuscaler

Description

Automatically scale the component based on CPU usage.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

Examples (cpuscaler)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: website
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: nginx
      traits:
        - type: cpuscaler
          properties:
            min: 1
            max: 10
            cpuUtil: 60

Specification (cpuscaler)

Name	Description	Type	Required	Default
min	Specify the minimal number of replicas to which the autoscaler can scale down.	int	false	1
max	Specify the maximum number of of replicas to which the autoscaler can scale up.	int	false	10
cpuUtil	Specify the average cpu utilization, for example, 50 means the CPU usage is 50%.	int	false	50
targetAPIVersion	Specify the apiVersion of scale target.	string	false	apps/v1
targetKind	Specify the kind of scale target.	string	false	Deployment

Env

Description

Add env on K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (env)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: env
          properties:
            # you can use env to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                env:
                  key_for_busybox_first: value_first
                  key_for_busybox_second: value_second
              - containerName: sidecar-nginx
                env:
                  key_for_nginx_first: value_first
                  key_for_nginx_second: value_second

Specification (env)

Name	Description	Type	Required	Default
--	Composition type.	parameter: cannot use value {containerName:"" \| string,replace:false \| bool,env:{},unset:*[] \| []} (type struct) as string	false

Expose

Description

Expose port to enable web traffic for your component.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

Examples (expose)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: test-app
spec:
  components:
    - name: hello-world
      type: webservice
      properties:
        image: crccheck/hello-world
      traits:
        - type: expose
          properties:
            port: [8000]

Specification (expose)

Name	Description	Type	Required	Default
port	Specify the exposion ports.	[]int	true
annotations	Specify the annotaions of the exposed service.	map[string]:string	true
type	Specify what kind of Service you want. options: "ClusterIP","NodePort","LoadBalancer","ExternalName".	string	false	ClusterIP

Gateway

Description

Enable public web traffic for the component, the ingress API matches K8s v1.20+.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

Examples (gateway)

# vela-app.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: first-vela-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: oamdev/hello-world
        port: 8000
      traits:
        - type: gateway
          properties:
            domain: testsvc.example.com
            http:
              "/": 8000

Specification (gateway)

Name	Description	Type	Required	Default
domain	Specify the domain you want to expose.	string	false
http	Specify the mapping relationship between the http path and the workload port.	map[string]:int	true
class	Specify the class of ingress to use.	string	false	nginx
classInSpec	Set ingress class in '.spec.ingressClassName' instead of 'kubernetes.io/ingress.class' annotation.	bool	false	false
secretName	Specify the secret name you want to quote to use tls.	string	false
gatewayHost	Specify the host of the ingress gateway, which is used to generate the endpoints when the host is empty.	string	false

Hostalias

Description

Add host aliases on K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (hostalias)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-hostalias
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
        - type: hostalias
          properties:
            hostAliases:
              - ip: 127.0.0.1
                hostnames:
                  - localname
                  - locals

Specification (hostalias)

Name	Description	Type	Required	Default
hostAliases	Specify the hostAliases to add.	[]hostAliases	true

hostAliases (hostalias)

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

Init-Container

Description

add an init container and use shared volume with pod.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (init-container)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: init-container
          properties:
            name: init-busybox
            image: busybox
            cmd: ["echo", "hello"]
            initMountPath: /data
            appMountPath: /data-initialized

Specification (init-container)

Name	Description	Type	Required	Default
name	Specify the name of init container.	string	true
image	Specify the image of init container.	string	true
imagePullPolicy	Specify image pull policy for your service.	string	false	IfNotPresent
cmd	Specify the commands run in the init container.	[]string	false
args	Specify the args run in the init container.	[]string	false
env	Specify the env run in the init container.	[]env	false
mountName	Specify the mount name of shared volume.	string	false	workdir
appMountPath	Specify the mount path of app container.	string	true
initMountPath	Specify the mount path of init container.	string	true
extraVolumeMounts	Specify the extra volume mounts for the init container.	[]extraVolumeMounts	true

env (init-container)

Name	Description	Type	Required
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 (init-container)

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

secretKeyRef (init-container)

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

configMapKeyRef (init-container)

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

extraVolumeMounts (init-container)

Name	Description	Type	Required	Default
name	The name of the volume to be mounted.	string	true
mountPath	The mountPath for mount in the init container.	string	true

Json-Merge-Patch

Description

Patch the output following Json Merge Patch strategy, following RFC 7396.

For now this trait is hidden from the VelaUX. Available when using CLI

Apply To Component Types

All Component Types

Examples (json-merge-patch)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          pod-label-key: pod-label-value
          to-delete-label-key: to-delete-label-value
      traits:
        # the json merge patch can be used to add, replace and delete fields
        # the following part will
        # 1. add `deploy-label-key` to deployment labels
        # 2. set deployment replicas to 3
        # 3. set `pod-label-key` to `pod-label-modified-value` in pod labels
        # 4. delete `to-delete-label-key` in pod labels
        # 5. reset `containers` for pod
        - type: json-merge-patch
          properties:
            metadata:
              labels:
                deploy-label-key: deploy-label-added-value
            spec:
              replicas: 3
              template:
                metadata:
                  labels:
                    pod-label-key: pod-label-modified-value
                    to-delete-label-key: null
                spec:
                  containers:
                    - name: busybox-new
                      image: busybox:1.34
                      command: ["sleep", "864000"]

Specification (json-merge-patch)

Name	Description	Type	Required	Default
-		{}	true

Json-Patch

Description

Patch the output following Json Patch strategy, following RFC 6902.

For now this trait is hidden from the VelaUX. Available when using CLI

Apply To Component Types

All Component Types

Examples (json-patch)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          pod-label-key: pod-label-value
          to-delete-label-key: to-delete-label-value
      traits:
        # the json patch can be used to add, replace and delete fields
        # the following part will
        # 1. add `deploy-label-key` to deployment labels
        # 2. set deployment replicas to 3
        # 3. set `pod-label-key` to `pod-label-modified-value` in pod labels
        # 4. delete `to-delete-label-key` in pod labels
        # 5. add sidecar container for pod
        - type: json-patch
          properties:
            operations:
              - op: add
                path: "/spec/replicas"
                value: 3
              - op: replace
                path: "/spec/template/metadata/labels/pod-label-key"
                value: pod-label-modified-value
              - op: remove
                path: "/spec/template/metadata/labels/to-delete-label-key"
              - op: add
                path: "/spec/template/spec/containers/1"
                value:
                  name: busybox-sidecar
                  image: busybox:1.34
                  command: ["sleep", "864000"]

Specification (json-patch)

Name	Description	Type	Required	Default
operations		[]operations	true

operations (json-patch)

Name	Description	Type	Required	Default
-		{}	true

Labels

Description

Add labels on your workload. if it generates pod, add same label for generated pods.

Apply To Component Types

All Component Types

Examples (labels)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: myapp
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: labels
          properties:
            "release": "stable"
        - type: annotations
          properties:
            "description": "web application"

Specification (labels)

Name	Description	Type	Required	Default
-		map[string]:(null\|string)	true

Lifecycle

Description

Add lifecycle hooks for every container of K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (lifecycle)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-lifecycle
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
        - type: lifecycle
          properties:
            postStart:
              exec:
                command:
                  - echo
                  - 'hello world'
            preStop:
              httpGet:
                host: "www.aliyun.com"
                scheme: "HTTPS"
                port: 443

Specification (lifecycle)

Name	Description	Type	Required	Default
postStart		postStart	false
preStop		preStop	false

postStart (lifecycle)

Name	Type	Required
exec	exec	false
httpGet	httpGet	false
tcpSocket	tcpSocket	false

exec (lifecycle)

Name	Description	Type	Required	Default
command		[]string	true

httpGet (lifecycle)

Name	Type	Required	Default
path	string	false
port	int	true
host	string	false
scheme	string	false	HTTP
httpHeaders	[]httpHeaders	false

httpHeaders (lifecycle)

Name	Description	Type	Required	Default
name		string	true
value		string	true

tcpSocket (lifecycle)

Name	Description	Type	Required	Default
port		int	true
host		string	false

preStop (lifecycle)

Name	Type	Required
exec	exec	false
httpGet	httpGet	false
tcpSocket	tcpSocket	false

exec (lifecycle)

Name	Description	Type	Required	Default
command		[]string	true

httpGet (lifecycle)

Name	Type	Required	Default
path	string	false
port	int	true
host	string	false
scheme	string	false	HTTP
httpHeaders	[]httpHeaders	false

httpHeaders (lifecycle)

Name	Description	Type	Required	Default
name		string	true
value		string	true

tcpSocket (lifecycle)

Name	Description	Type	Required	Default
port		int	true
host		string	false

Nocalhost

Description

nocalhost develop configuration.

For now this trait is hidden from the VelaUX. Available when using CLI

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (nocalhost)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: bookinfo
spec:
  components:
    - name: productpage
      type: webservice
      properties:
        image: nocalhost-docker.pkg.coding.net/nocalhost/bookinfo/productpage:latest
        port: 9080
      traits:
        - type: nocalhost
          properties:
            port: 9080
            gitUrl: https://github.com/nocalhost/bookinfo-productpage.git
            image: nocalhost-docker.pkg.coding.net/nocalhost/dev-images/python:3.7.7-slim-productpage-with-pydevd
            shell: "bash"
            workDir: "/opt/work"
            resources:
              limits:
                memory: 1Gi
                cpu: "1"
              requests:
                memory: 512Mi
                cpu: "0.5"
            debug:
              remoteDebugPort: 9009
            hotReload: true
            sync:
              type: send
              filePattern:
                - ./
              ignoreFilePattern:
                - .git
                - .idea
            command:
              run:
                - sh
                - run.sh
              debug:
                - sh
                - debug.sh
            env:
              - name: "foo"
                value: "bar"
            portForward:
              - 39080:9080

Specification (nocalhost)

Name	Type	Required	Default
port	int	true
serviceType	string	false	deployment
gitUrl	string	false
image	string	true
shell	string	false	bash
workDir	string	false	/home/nocalhost-dev
storageClass	string	false
command	command	true
debug	debug	false
hotReload	bool	false	true
sync	sync	true
env	[]env	false
portForward	[]string	false
persistentVolumeDirs	[]persistentVolumeDirs	false
resources	resources	true

command (nocalhost)

Name	Description	Type	Required	Default
run		[]string	true
debug		[]string	true

debug (nocalhost)

Name	Description	Type	Required	Default
remoteDebugPort		int	false

sync (nocalhost)

Name	Type	Required	Default
type	string	false	send
filePattern	[]string	true
ignoreFilePattern	[]string	true

env (nocalhost)

Name	Description	Type	Required	Default
name		string	true
value		string	true

persistentVolumeDirs (nocalhost)

Name	Description	Type	Required	Default
path		string	true
capacity		string	true

resources (nocalhost)

Name	Description	Type	Required	Default
limits		limits	true
requests		requests	true

limits (nocalhost)

Name	Description	Type	Required	Default
memory		string	false	2Gi
cpu		string	false	2

requests (nocalhost)

Name	Description	Type	Required	Default
memory		string	false	512Mi
cpu		string	false	0.5

Resource

Description

Add resource requests and limits on K8s pod for your workload which follows the pod spec in path 'spec.template.'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (resource)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: resource-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        ports:
          - port: 8000
      traits:
        - type: resource
          properties:
            cpu: 2
            memory: 2Gi
            requests:
              cpu: 2
              memory: 2Gi
            limits:
              cpu: 4
              memory: 4Gi

Specification (resource)

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for requests and limits.	number	false	1
memory	Specify the amount of memory for requests and limits.	string	false	2048Mi
requests	Specify the resources in requests.	requests	false
limits	Specify the resources in limits.	limits	false

requests (resource)

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for requests.	number	false	1
memory	Specify the amount of memory for requests.	string	false	2048Mi

limits (resource)

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for limits.	number	false	1
memory	Specify the amount of memory for limits.	string	false	2048Mi

Scaler

Description

Manually scale K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

Examples (scaler)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: website
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: nginx
      traits:
        - type: scaler
          properties:
            replicas: 2
        - type: sidecar
          properties:
            name: "sidecar-test"
            image: "fluentd"
    - name: backend
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'

Specification (scaler)

Name	Description	Type	Required	Default
replicas	Specify the number of workload.	int	false	1

Service-Account

Description

Specify serviceAccount for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (service-account)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: vela-doc
  namespace: vela-system
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: oamdev/vela-cli:v1.5.0-beta.1
        cmd: ["/bin/vela","show"]
        ports:
          - port: 18081
            expose: true
      traits:
        - type: service-account
          properties:
            name: kubevela-vela-core

Specification (service-account)

Name	Description	Type	Required	Default
name	Specify the name of ServiceAccount.	string	true
create	Specify whether to create new ServiceAccount or not.	bool	false	false
privileges	Specify the privileges of the ServiceAccount, if not empty, RoleBindings(ClusterRoleBindings) will be created.	[]privileges	false

privileges (service-account)

Name	Description	Type	Required	Default
verbs	Specify the verbs to be allowed for the resource.	[]string	true
apiGroups	Specify the apiGroups of the resource.	[]string	false
resources	Specify the resources to be allowed.	[]string	false
resourceNames	Specify the resourceNames to be allowed.	[]string	false
nonResourceURLs	Specify the resource url to be allowed.	[]string	false
scope	Specify the scope of the privileges, default to be namespace scope.	string	false	namespace

Service-Binding

Description

Binding secrets of cloud resources to component env. This definition is DEPRECATED, please use 'storage' instead.

For now this trait is hidden from the VelaUX. Available when using CLI

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (service-binding)

Prepare a Kubernetes Secret

The secret can be manually created, or generated by other component or external system.

For example, we have a secret db-conn-example whose data is as below:

endpoint: https://xxx.com
password: 123
username: myname

Bind the Secret into your component by service-binding trait

For example, we have a webservice component who needs to consume a database. The database connection string should be set to Pod environments: endpoint, username and DB_PASSWORD.

We can set the properties for envMappings as below. For each environment, secret represents the secret name, and key represents the key of the secret.

Here is the complete properties for the trait.

traits:
- type: service-binding
  properties:
    envMappings:
      DB_PASSWORD:
        secret: db-conn-example
        key: password            
      endpoint:
        secret: db-conn-example
        key: endpoint
      username:
        secret: db-conn-example
        key: username

In particular, if the environment name, like endpoint, is same to the key of the secret, we can omit the key. So we can simplify the properties as below.

traits:
- type: service-binding
  properties:
    envMappings:
      DB_PASSWORD:
        secret: db-conn-example
        key: password            
      endpoint:
        secret: db-conn-example
      username:
        secret: db-conn-example

We can finally prepare an Application for the business component binding-test-comp to consume the secret, which is a representative of a database cloud resource.

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: webapp
spec:
  components:
    - name: binding-test-comp
      type: webservice
      properties:
        image: zzxwill/flask-web-application:v0.3.1-crossplane
        ports: 80
      traits:
        - type: service-binding
          properties:
            envMappings:
              # environments refer to db-conn secret
              DB_PASSWORD:
                secret: db-conn-example
                key: password            
              endpoint:
                secret: db-conn-example
              username:
                secret: db-conn-example

Deploy this YAML and the Secret db-conn-example will be binding into environment of workload.

Specification (service-binding)

Name	Description	Type	Required	Default
envMappings	The mapping of environment variables to secret.	map[string]:#KeySecret	true

Sidecar

Description

Inject a sidecar container to K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (sidecar)

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: vela-app-with-sidecar
spec:
  components:
    - name: log-gen-worker
      type: worker
      properties:
        image: busybox
        cmd:
          - /bin/sh
          - -c
          - >
            i=0;
            while true;
            do
              echo "$i: $(date)" >> /var/log/date.log;
              i=$((i+1));
              sleep 1;
            done
        volumes:
          - name: varlog
            mountPath: /var/log
            type: emptyDir
      traits:
        - type: sidecar
          properties:
            name: count-log
            image: busybox
            cmd: [ /bin/sh, -c, 'tail -n+1 -f /var/log/date.log']
            volumes:
              - name: varlog
                path: /var/log

Specification (sidecar)

Name	Description	Type	Required
name	Specify the name of sidecar container.	string	true
image	Specify the image of sidecar container.	string	true
cmd	Specify the commands run in the sidecar.	[]string	false
args	Specify the args in the sidecar.	[]string	false
env	Specify the env in the sidecar.	[]env	false
volumes	Specify the shared volume path.	[]volumes	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

env (sidecar)

Name	Description	Type	Required
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 (sidecar)

Name	Description	Type	Required
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
fieldRef	Specify the field reference for env.	fieldRef	false

secretKeyRef (sidecar)

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

configMapKeyRef (sidecar)

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

fieldRef (sidecar)

Name	Description	Type	Required	Default
fieldPath	Specify the field path for env.	string	true

volumes (sidecar)

Name	Description	Type	Required	Default
name		string	true
path		string	true

livenessProbe (sidecar)

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	false	0
periodSeconds	How often, in seconds, to execute the probe.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	false	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	false	3

exec (sidecar)

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

httpGet (sidecar)

Name	Description	Type	Required
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 (sidecar)

Name	Description	Type	Required	Default
name		string	true
value		string	true

tcpSocket (sidecar)

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

readinessProbe (sidecar)

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	false	0
periodSeconds	How often, in seconds, to execute the probe.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	false	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	false	3

exec (sidecar)

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

httpGet (sidecar)

Name	Description	Type	Required
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 (sidecar)

Name	Description	Type	Required	Default
name		string	true
value		string	true

tcpSocket (sidecar)

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

Storage

Description

Add storages on K8s pod for your workload which follows the pod spec in path 'spec.template'.

Apply To Component Types

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Examples (storage)

# sample.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: storage-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: oamdev/hello-world
        ports:
          - port: 8000
      traits:
        - type: storage
          properties:
            # PVC type storage
            pvc:
              - name: test1
                mountPath: /test/mount/pvc
            # EmptyDir type storage
            emptyDir:
              - name: test1
                mountPath: /test/mount/emptydir
            # ConfigMap type storage
            configMap:
              - name: test1
                mountPath: /test/mount/cm
                # Mount ConfigMap to Env
                mountToEnv:
                  envName: TEST_ENV
                  configMapKey: key1
                data:
                  key1: value1
                  key2: value2
            # Secret type storage
            secret:
              - name: test1
                mountPath: /test/mount/secret
                # Mount Secret to Env
                mountToEnv:
                  envName: TEST_SECRET
                  secretKey: key1
                data:
                  key1: dmFsdWUx
                  key2: dmFsdWUy

Specification (storage)

Name	Description	Type	Required
pvc	Declare pvc type storage.	[]pvc	false
configMap	Declare config map type storage.	[]configMap	false
secret	Declare secret type storage.	[]secret	false
emptyDir	Declare empty dir type storage.	[]emptyDir	false

pvc (storage)

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountPath	string	true
subPath	string	false
volumeMode	string	false	Filesystem
volumeName	string	false
accessModes	[]string	true
storageClassName	string	false
resources	resources	false
dataSourceRef	dataSourceRef	false
dataSource	dataSource	false
selector	selector	false

resources (storage)

Name	Description	Type	Required	Default
requests		requests	true
limits		limits	false

requests (storage)

Name	Description	Type	Required	Default
storage		string	true

limits (storage)

Name	Description	Type	Required	Default
storage		string	true

dataSourceRef (storage)

Name	Type	Required
name	string	true
kind	string	true
apiGroup	string	true

dataSource (storage)

Name	Type	Required
name	string	true
kind	string	true
apiGroup	string	true

selector (storage)

Name	Description	Type	Required	Default
matchLabels		map[string]:string	false
matchExpressions		matchExpressions	false

matchExpressions (storage)

Name	Type	Required
key	string	true
values	[]string	true
operator	string	true

configMap (storage)

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountToEnv	mountToEnv	false
mountToEnvs	[]mountToEnvs	false
mountPath	string	false
subPath	string	false
defaultMode	int	false	420
readOnly	bool	false	false
data	map[string]:_	false
items	[]items	false

mountToEnv (storage)

Name	Description	Type	Required	Default
envName		string	true
configMapKey		string	true

mountToEnvs (storage)

Name	Description	Type	Required	Default
envName		string	true
configMapKey		string	true

items (storage)

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

secret (storage)

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountToEnv	mountToEnv	false
mountToEnvs	[]mountToEnvs	false
mountPath	string	false
subPath	string	false
defaultMode	int	false	420
readOnly	bool	false	false
stringData	map[string]:_	false
data	map[string]:_	false
items	[]items	false

mountToEnv (storage)

Name	Description	Type	Required	Default
envName		string	true
secretKey		string	true

mountToEnvs (storage)

Name	Description	Type	Required	Default
envName		string	true
secretKey		string	true

items (storage)

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

emptyDir (storage)

Name	Type	Required	Default
name	string	true
mountPath	string	true
subPath	string	false
medium	string	false	empty

Affinity​

Description​

Apply To Component Types​

Examples (affinity)​

Specification (affinity)​

podAffinity (affinity)​

required (affinity)​

labelSelector (affinity)​

matchExpressions (affinity)​

namespaceSelector (affinity)​

matchExpressions (affinity)​

preferred (affinity)​

podAffinityTerm (affinity)​

labelSelector (affinity)​

matchExpressions (affinity)​

namespaceSelector (affinity)​

matchExpressions (affinity)​

podAntiAffinity (affinity)​

required (affinity)​

labelSelector (affinity)​

matchExpressions (affinity)​

namespaceSelector (affinity)​

matchExpressions (affinity)​

preferred (affinity)​

podAffinityTerm (affinity)​

labelSelector (affinity)​

matchExpressions (affinity)​

namespaceSelector (affinity)​

matchExpressions (affinity)​

nodeAffinity (affinity)​

required (affinity)​

nodeSelectorTerms (affinity)​

matchExpressions (affinity)​

matchFields (affinity)​

preferred (affinity)​

preference (affinity)​

matchExpressions (affinity)​

matchFields (affinity)​

tolerations (affinity)​

Annotations​

Description​

Apply To Component Types​

Examples (annotations)​

Specification (annotations)​

Command​

Description​

Apply To Component Types​

Examples (command)​

Specification (command)​

Container-Image​

Description​

Apply To Component Types​

Examples (container-image)​

Specification (container-image)​

Cpuscaler​

Description​

Apply To Component Types​

Examples (cpuscaler)​

Specification (cpuscaler)​

Env​

Description​

Apply To Component Types​

Examples (env)​

Specification (env)​

Expose​

Description​

Apply To Component Types​

Examples (expose)​

Specification (expose)​

Gateway​

Description​

Apply To Component Types​

Examples (gateway)​

Specification (gateway)​

Hostalias​

Description​

Apply To Component Types​

Examples (hostalias)​

Specification (hostalias)​

hostAliases (hostalias)​

Affinity

Description

Apply To Component Types

Examples (affinity)

Specification (affinity)

podAffinity (affinity)

required (affinity)

labelSelector (affinity)

matchExpressions (affinity)

namespaceSelector (affinity)

matchExpressions (affinity)

preferred (affinity)

podAffinityTerm (affinity)

labelSelector (affinity)

matchExpressions (affinity)

namespaceSelector (affinity)

matchExpressions (affinity)

podAntiAffinity (affinity)

required (affinity)

labelSelector (affinity)

matchExpressions (affinity)

namespaceSelector (affinity)

matchExpressions (affinity)

preferred (affinity)

podAffinityTerm (affinity)

labelSelector (affinity)

matchExpressions (affinity)

namespaceSelector (affinity)

matchExpressions (affinity)

nodeAffinity (affinity)

required (affinity)

nodeSelectorTerms (affinity)

matchExpressions (affinity)

matchFields (affinity)

preferred (affinity)

preference (affinity)

matchExpressions (affinity)

matchFields (affinity)

tolerations (affinity)

Annotations

Description

Apply To Component Types

Examples (annotations)

Specification (annotations)

Command

Description

Apply To Component Types

Examples (command)

Specification (command)

Container-Image

Description

Apply To Component Types

Examples (container-image)

Specification (container-image)

Cpuscaler

Description

Apply To Component Types

Examples (cpuscaler)

Specification (cpuscaler)

Env

Description

Apply To Component Types

Examples (env)

Specification (env)

Expose

Description

Apply To Component Types

Examples (expose)

Specification (expose)

Gateway

Description

Apply To Component Types

Examples (gateway)

Specification (gateway)

Hostalias

Description

Apply To Component Types

Examples (hostalias)

Specification (hostalias)

hostAliases (hostalias)