As Containers have progressed, Docker has stood out as the defacto standard. As many of the laggards are coming up to speed, Dockerfiles can be seen in many open source repositories. With the addition to that, I have seen a few repos with a
Additionally, you find an IF clause in the
CMD statement such as:
CMD if [ "$REACT_NODE_ENV" = "development" ]; \ then yarn dev; \ else yarn build && yarn start --only=production; \ fi
To those repositories, I have one daunting question:
Container start commands can be overwritten at run time. Here is how to do it:
# Dockerfile FROM alpine:3.6 CMD echo "production start command"
# docker-compose.yml version: '3' services: dev-server: build: . command: echo 'development start command'
# kubernetes-deployment.yml apiVersion: apps/v1 kind: Deployment metadata: name: cool-app namespace: cool-app-testing labels: app: cool-app spec: replicas: 1 selector: matchLabels: app: cool-app template: metadata: labels: app: cool-app spec: containers: - name: cool-app image: alpine:3.6 command: - echo - 'testing start command'