saurabhtmba2005/kubeless

Use serverless framwork for kubernetes..

Kubeless

Use serverless framwork for kubernetes..

Add system:serviceaccount:kubeless:controller-acct account to ABAC policy file .. {"apiVersion": "abac.authorization.kubernetes.io/v1beta1", "kind": "Policy", "spec": {"user":"system:serviceaccount:kubeless:controller-acct","nonResourcePath": "","namespace":"","resource":"","apiGroup":""}}

Installation

Installation is made of three steps:

Download the kubeless CLI from the release page. (OSX users can also use brew: brew install kubeless/tap/kubeless).
Create a kubeless namespace (used by default)
Then use one of the YAML manifests found in the release page to deploy kubeless. It will create a functions Custom Resource Definition and launch a controller. You will see a kubeless controller, a kafka and a zookeeper statefulset appear and shortly get in running state.

kubectl create ns kubeless kubectl create -f kubeless.yaml for ABAC kubernetes cluster kubectl get pods -n kubeless NAME READY STATUS RESTARTS AGE kafka-0 1/1 Running 0 1m kubeless-controller-3331951411-d60km 1/1 Running 0 1m zoo-0 1/1 Running 0 1m

$ kubectl get deployment -n kubeless NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE kubeless-controller 1 1 1 1 1m

$ kubectl get statefulset -n kubeless NAME DESIRED CURRENT AGE kafka 1 1 1m zoo 1 1 1m

$ kubectl get customresourcedefinition NAME KIND functions.k8s.io CustomResourceDefinition.v1beta1.apiextensions.k8s.io

$ kubectl get functions Usage

You can use the CLI to create a function. Functions have three possible types:

http triggered (function will expose an HTTP endpoint)
pubsub triggered (function will consume event on a specific topic)
schedule triggered (function will be called on a cron schedule)

HTTP function

Here is a toy:

def foobar(context): print context.json return context.json

You create it with:

$ kubeless function deploy get-python --runtime python2.7
--from-file test.py
--handler test.foobar
--trigger-http INFO[0000] Deploying function... INFO[0000] Function get-python submitted for deployment INFO[0000] Check the deployment status executing 'kubeless function ls get-python' $ kubeless function ls NAME NAMESPACE HANDLER RUNTIME TYPE TOPIC DEPENDENCIES STATUS get-python default helloget.foo python2.7 HTTP 1/1 READY

$ kubeless function call get-python --data '{"echo": "echo echo"}' {"echo": "echo echo"}

Or you can curl directly with kubectl proxy using an apiserver proxy URL. For example:

$ kubectl proxy -p 8080 &

$ curl -L --data '{"Another": "Echo"}' localhost:8080/api/v1/proxy/namespaces/default/services/get-python:function-port/ --header "Content-Type:application/json" {"Another": "Echo"}

Function access with Ingress controller

Create route

Kubeless support ingress command to create route to function.

$ kubeless route --help ingress command allows user to list, create, delete routing rule for function on Kubeless

Usage: kubeless route SUBCOMMAND [flags] kubeless route [command]

Available Commands: create create a route to function delete delete a route from Kubeless list list all routes in Kubeless

Use "kubeless route [command] --help" for more information about a command.

We will create a route to get-python function:

$ kubeless route create route1 --function get-python

$ kubeless route create route2 --function get-python --hostname example.com $ kubectl get ing NAME HOSTS ADDRESS PORTS AGE route1 get-python.192.168.99.100.nip.io 192.168.99.100 80 3m route2 example.com 80 6s You can test the new route with the following command:

$ curl --data '{"Another": "Echo"}' --header "Host: get-python.192.168.99.100.nip.io" 192.168.99.100/ --header "Content-Type:application/json" {"Another": "Echo"}

Kubeless ui

$ Kubectl create -f kubelessui.yaml Url : http://ip:3000