Running container as functions

Note: Support for containers in alpha, we plan to improve experience over coming releases. Your feedback is most appreciated to improve it.

With 1.14 release, Fission allows you to run your existing container as a function.

Running container image with Fission

fission function run-container provides required options to run an exiting container image as a Fission function.

$ fission function run-container --name cn-hello --image gcr.io/google-samples/node-hello:1.0 --port 8080
function 'cn-hello' created

Listing functions,

$ fission function list
NAME     ENV    EXECUTORTYPE MINSCALE MAXSCALE MINCPU MAXCPU MINMEMORY MAXMEMORY TARGETCPU SECRETS CONFIGMAPS
cn-hello        container    1        1        0      0      0         0         80

Test container function,

$ fission fn test --name cn-hello
Hello Kubernetes!

We have added spec.podspec in Function Spec which captures container function details. Know more about options for running container with Functions,

kubectl explain functions.spec.podspec

You can also generate function spec with Fission CLI.

$ fission spec init
Creating fission spec directory 'specs'
$ fission function run-container --name cn-hello --image gcr.io/google-samples/node-hello:1.0 --port 8080 --spec
Saving Function 'default/cn-hello' to 'specs/function-cn-hello.yaml'
$ cat specs/function-cn-hello.yaml
apiVersion: fission.io/v1
kind: Function
metadata:
  creationTimestamp: null
  name: cn-hello
  namespace: default
spec:
  InvokeStrategy:
    ExecutionStrategy:
      ExecutorType: container
      MaxScale: 1
      MinScale: 1
      SpecializationTimeout: 120
      TargetCPUPercent: 80
    StrategyType: execution
  environment:
    name: ""
    namespace: ""
  functionTimeout: 60
  idletimeout: 120
  package:
    packageref:
      name: ""
      namespace: ""
  podspec:
    containers:
    - image: gcr.io/google-samples/node-hello:1.0
      name: cn-hello
      ports:
      - containerPort: 8080
        name: http-env
      resources: {}
  resources: {}

Running Next.js app container with Fission

You can run a sample Next.js based app.

$ fission fn run-container --name=nextapp --image fission/next-sample-app:1.0.0 --port 3000
function 'nextapp' created
$ fission route create --name nextapp --function nextapp --prefix /nextapp --keepprefix
trigger 'nextapp' created

Visit app URL, http://<router_url>/nextapp/

You can refer it source for the application here.

Command options

You can also use alias, fission fn runc instead of fission function run-container OR fission fn updatec instead of fission fn updatec.

Please check command help for more options while creating container based functions.

Last modified August 2, 2021: Documentation changes for 1.14.0 release (#276) (9fdd960)