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Docker

2026-05-27T09:00:04Z

‎im VSC ein file per CMD öffnen

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	docker exec -it [mycontainer or ID] sh		docker exec -it [mycontainer or ID] sh
		+
		+	= Dockerfile Basic Syntax =
		+	<pre>
		+	```Dockerfile
		+	# Base image to build layer on top
		+	FROM node:18-alpine
		+
		+	# Working directory for build and runtime
		+	WORKDIR /app
		+
		+	# Copy from "build context" into container image
		+	COPY . .
		+
		+	# Run command during build time
		+	RUN npm install
		+
		+	# Instructions what to run when container starts
		+	CMD ["node", "src/index.js"]
		+	</pre>
		+
		+	= [Additional Dockerfile instructions https://docs.docker.com/reference/dockerfile/] =
		+	<pre>
		+	ENV - Variables available to RUN commands and on container execution.
		+	ARG - Arguments you can pass to `docker build` to customize an image.
		+
		+	RUN \
		+	--mount - Mount a volume during build.
		+	--network - To deactivate the network for this step or to use the host network.
		+	--security - Similar to `docker run --priviliged` for build time.
		+
		+	USER - User and group ID used for the following RUN, CMD and/or ENTRYPOINT.
		+	SHELL - Override default shell for RUN, CMD and ENTRYPOINT (e.g. powershell instead of cmd in Windows Containers).
		+
		+	EXPOSE - "Documentation" about which ports should be exposed (no actual effect).
		+	VOLUME - Creates volumes on `docker run` ("ignored" by Kubernetes).
		+
		+	ONBUILD - Sneak in Dockerfile instructions if image is used as base image (scary magical feature).
		+	STOPSIGNAL - Signal to stop container ie. SIGKILL, SIGTERM...
		+	HEALTHCHECK - Docker specific feature for health checks (ignored by Kubernetes).
		+
		+	LABEL - Metadata key value pairs: org.opencontainers.image.authors="hans@letsboot.ch"
		+	MAINTAINER - Sets the Author field of the generated images (deprecated)
		+	</pre>
		+
		+
		+	= Multistaging =
		+
		+	diff -y 1030-images/exercise/hello-go-multistage.Dockerfile 1030-images/solution/hello-go-multistage.Dockerfile \|\| true
		+
		+	= im VSC ein file per CMD öffnen =
		+	$ code-server 1030-images/solution/hello-go-secure.Dockerfile
		+
		+
		+	= laps =
		+	= isovalent laps =
		+	https://isovalent.com/labs/cilium-gateway-api-advanced/