Introducing Knative to Small Teams

Knative is a powerful and small serverless platform you can install into any Kubernetes cluster to allow developers to build, deploy, scale up and down, and even consume/publish events.

https://starkandwayne.com/blog/introduction-to-knative/

Other links mentioned in slide deck:

https://cloud.google.com/knative/
https://github.com/cppforlife/knctl
https://github.com/cppforlife/kwt
https://github.com/starkandwayne/knative-env
https://github.com/drnic/ruby-meetup-2018-11-27

Transcript

1. Title Text
   Body Level One
   Body Level Two
   Body Level Three
   Body Level Four
   Body Level Five
   Introducing Knative
   to Small Teams
   Dr Nic Williams @drnic
   

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2. Knative
   @drnic
   Build

   Source code to Docker
   ɑ
   Serving

   Run containers; Route traffic
   Eventing

   Publish & subscribe to events
   Kubernetes

   Containers on any cloud
   

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3. https://starkandwayne.com/blog/introduction-to-knative/
   

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4. knctl deploy -s meetup --image drnic/meetup:v1
   Serving

   Run containers; Route traffic
   myblog.com/first-post Routing 3+ Pods
   https://starkandwayne.com/blog/deploying-12factor-apps-to-knative/
   ɂ
   

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5. Autoscaling

   No traffic, no containers
   __
   https://starkandwayne.com/blog/deploying-12factor-apps-to-knative/
   myblog.com/post Routing 3 Pods
   ɂ
   Routing 0 Pods
   ɂ
   

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6. knctl deploy -s meetup --image drnic/meetup:v1
   Serving

   Revisions have separate routing
   knctl deploy -s meetup --image drnic/meetup:v2
   myblog.com/post Routing v2 - 3 Pods
   ɂ
   v1 - 0 Pods
   

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7. knctl deploy -s meetup --image drnic/meetup:v2 \
   --env TARGET="revision 3"
   Serving

   Revisions have separate routing
   myblog.com/post Routing v3 - 3 Pods
   ɂ
   v1 - 0 Pods
   v2 - 0 Pods
   

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8. Serving

   Rollout new revisions gradually
   $ knctl revisions list
   Service Name Tags Conditions Age Traffic
   meetup meetup-00003 latest 4 OK / 4 48s 100% -> meetup.default.example.com
   ~ meetup-00002 previous 4 OK / 4 1m -
   ~ meetup-00001 - 4 OK / 4 10m -
   $ knctl deploy -s meetup --image drnic/meetup:v2 --env TARGET="revision 4" \
   --managed-route=false
   $ knctl rollout --route meetup -p meetup:previous=50% -p meetup:latest=50%
   $ knctl revisions list
   Service Name Tags Conditions Age Traffic
   meetup meetup-00004 latest 4 OK / 4 4m 50% -> meetup.default.example.com
   ~ meetup-00003 previous 4 OK / 4 6m 50% -> meetup.default.example.com
   

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9. Local traffic

   kwt is your friend
   $ sudo -E kwt net start --dns-map-exec='knctl dns-map'
   $ curl meetup.default.example.com
   $ watch -n1 curl -sS meetup.default.example.com
   https://github.com/cppforlife/kwt
   

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10. Build & Serving

    Deploy from Dockerfile
    git clone https://github.com/cppforlife/simple-app
    cd simple-app
    cat Dockerfile
    knctl deploy \
    --service simple-app \
    --directory . \
    --service-account build \
    --image drnic/simple-app \
    --env SIMPLE_MSG="Hello Ruby people"
    

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11. Build & Serving

    Deploy from Buildpack
    git clone https://github.com/starkandwayne/knative-env
    cd knative-env
    knctl deploy -d . \
    --service knative-env \
    --service-account build \
    --template buildpack \
    --image drnic/knative-env
    

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12. Installation

    Knative on Kubernetes
    kubectl version
    knctl install
    Ingress

    DNS to ingress gateway
    https://starkandwayne.com/blog/public-traffic-into-knative-on-gke/
    https://starkandwayne.com/blog/adding-a-custom-domain-for-knative-services/
    

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13. Knative
    @drnic
    Build

    Source code to Docker
    ɑ
    Serving

    Run containers; Route traffic
    Eventing

    Publish & subscribe to events
    

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14. https://starkandwayne.com/blog/introduction-to-knative/
    https://github.com/cppforlife/knctl
    https://github.com/cppforlife/kwt
    https://cloud.google.com/knative/
    https://github.com/starkandwayne/knative-env
    https://github.com/drnic/ruby-meetup-2018-11-27
    

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