Added kustomize to gke method

[murog]

Fixes issue #48

• added kustomization.yaml
• prepended deployment images withUSER-REPO
• added kustomize build step to gke method config
• updated readme to instruct users to build kustomize community builder
• opened PR to patch kustomize version on community builder: update kustomize version to current stable v2.0.3 cloud-builders-community#220

Clean up

• renamed service-web.yaml to web-service.yaml

[davidstanke]

Cool! One question (note that I'm not very familiar with kustomize): is it possible to overwrite the configs in place? If we could do that, we wouldn't have to save a new file. Not a big deal of course but it would be a little cleaner.

[murog]

Not as far as I can tell unfortunately. kustomize buildcan be used in a couple ways:
kustomize build . : prints output
kustomize build . > temp.yaml : save output to temp
kustomize build . | kubectl apply -f - apply output

[murog]

kustomize cloud builder has kubectl but I think it would make it harder to follow because it would require some extra env variables or gcloud get-credentials command.

[davidstanke]

Flipping the script! I just learned that kubectl now has kustomize built-in. If I read this correctly, we can patch the config and deploy the app in one command. I haven't tried it yet, though, and IDK if cloud-builders has a new enough version of kubectl for this to work.

[murog]

nice! will look into it, there might be a version issue

[murog]

cloud-builders uses kubectl gcloud component which is 1.11
https://cloud.google.com/sdk/docs/release-notes

Google Kubernetes Engine kubectl is updated to 1.11.9. Addresses security vulnerability: CVE-2019-1002101.

https://github.com/GoogleCloudPlatform/cloud-builders/blob/master/kubectl/Dockerfile

RUN /builder/google-cloud-sdk/bin/gcloud -q components install kubectl