Introduce support for Source events incoming as external requests

[pkosiec]

Description

Changes proposed in this pull request:

• Introduce support for Source events incoming as external requests

Follow-ups:

• Introduce docs
• [nice to have] Validate incoming requests with provided JSON schema from metadata

Testing

Integration tests cover this piece of functionality. However, you can test it by yourself with cm-watcher:

Checkout this PR:

gh pr checkout 1217

Build plugins:

PLUGIN_DOWNLOAD_URL_BASE_PATH="http://localhost:64538/plugin-dist" make gen-plugins-index
npx serve --listen 64538

Prepare Botkube config:

sources:
  'cm-watcher':
    displayName: "K8s ConfigMaps changes"
    botkube/cm-watcher:
      enabled: true
      context:
        rbac:
          group:
            type: Static
            static:
              values: [ "priv-channel" ]
      config:
        configMap:
          name: cm-watcher-trigger
          namespace: botkube
          event: ADDED

communications:
  "default-group":
    socketSlack:
      enabled: true
      appToken: "xapp-"
      botToken: "xoxb-"
      channels:
        "default":
          name: "botkube-demo"
          bindings:
            executors: []
            sources:
              - cm-watcher
              - k8s-all-events

plugins:
  repositories:
    botkube:
       url: http://localhost:64538/plugins-dev-index.yaml

Run Botkube:

export KUBECONFIG=/Users/pkosiec/oci-playground/kubeconfi
export BOTKUBE_SETTINGS_LOG_LEVEL=debug
export BOTKUBE_PLUGINS_CACHE__DIR="/tmp/plugins"
export BOTKUBE_CONFIG_PATHS="$(pwd)/helm/botkube/values.yaml,$(pwd)/comm_config.yaml"
export LOG_LEVEL_SOURCE_BOTKUBE_CM_WATCHER="debug"
go run ./cmd/botkube-agent/main.go

Run requests:

This will fail:

curl --request POST \
  --url http://localhost:2115/sources/v1/k8s-all-events \
  --header 'Content-Type: application/json' \
  --data '{
	"message": "Foo"
}'

But this will succeed:

curl --request POST \
  --url http://localhost:2115/sources/v1/cm-watcher \
  --header 'Content-Type: application/json' \
  --data '{
	"message": "Foo"
}'

Related issue(s)

#1175