Docker

• [[Podman]]
• [[Kubernetes]]
• [[Docker-Compose]]

Examples

• Docker Run Reference
• Run a Container and remove after:

docker run --rm -it ubuntu:latest bash

• Expose port container:8080 on host:80:

docker run --rm -it  -p 80:8080 ubuntu:latest bash

• Mount a volume: https://docs.docker.com/storage/volumes/

docker run --rm -it  -v /local/path:/mount/path ubuntu:latest bash

• Get a Docker Image and specify platform:

docker run --rm -ti --platform linux/amd64 ubuntu:latest bash

• Delete all images source:

  docker rmi -f $(docker images -aq)

Capabilities

• https://man7.org/linux/man-pages/man7/capabilities.7.html

Dockerfile

• https://docs.docker.com/develop/develop-images/dockerfile_best-practices/

Multi-Stage Builds

• https://docs.docker.com/develop/develop-images/multistage-build/

WORKDIR /go/src/github.com/alexellis/href-counter/
RUN go get -d -v golang.org/x/net/html
COPY app.go .

RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . FROM alpine:latest
RUN apk --no-cache add ca-certificates 
WORKDIR /root/
COPY --from=builder /go/src/github.com/alexellis/href-counter/app .
CMD ["./app"]

NFS

• Mount an NFS Volume with Docker Compose

version: '2'
volumes:
nfs_volume_name:
driver: local
driver_opts:
  type: nfs4
  o: "addr=192.168.0.xxx,rw,noatime,rsize=8192,wsize=8192,tcp,timeo=14"
  device: ":path/to/volume"
services:
image_name:
image: "image:latest"
volumes:
  - nfs_volume_name:/data/test_nfs

• https://stackoverflow.com/questions/45282608/how-to-directly-mount-nfs-share-volume-in-container-using-docker-compose-v3

version: "3.2"

services:
rsyslog:
image: jumanjiman/rsyslog
ports:
  - "514:514"
  - "514:514/udp"
volumes:
  - type: volume
	source: example
	target: /nfs
	volume:
	  nocopy: true
volumes:
example:
driver_opts:
  type: "nfs"
  o: "addr=10.40.0.199,nolock,soft,rw"
  device: ":/docker/example"

Docker Compose

• Wiki
• Documentation

Registry

• Documentation

Network

• https://iximiuz.com/en/posts/container-networking-is-simple/