I seem to have 5 different places where I keep example commands to do the little things in Docker or Kubernetes. Things like attach to a running node, start a proxy, tag an image etc etc… So here it is.
Note: This will likely update over time
Kubernetes
Env Setup
This sets up the terminal in a nicer way
alias k=kubectl
export KUBE_EDITOR="nano"
export do="--dry-run=client -o yaml"
export now="--grace-period 0 --force"
source <(kubectl completion bash)
complete -F __start_kubectl k
Pods
| Command | Description |
|---|---|
k run nginx --image=nginx $do > nginx.yaml |
Get YAML from a pod |
kubectl exec -it <pod-name> -- /bin/bash |
Enter a running pod |
kubectl run -it --rm ib-test --image=debian |
Start a temporary pod that deletes on exit |
Docker
Install via Snap (Ubuntu)
sudo snap refresh
sudo snap install docker
sudo addgroup --system docker
sudo adduser $USER docker
newgrp docker
sudo snap restart docker
You will also need to disable and re-enable the docker snap if you added the group while it was running.
sudo snap disable docker
sudo snap enable docker
Images
| Command | Description |
|---|---|
docker system prune |
Remove old images and containers |
docker container run -it [yourImage] bash |
Run an interactive container |
docker container run --rm -it [yourImage] bash |
Run and auto-delete interactive container |
docker container run --mount type=bind,source="$(pwd)",target=/app --rm -it [yourImage] bash |
Run container with a bind mount |
docker tag reponame/myimage:latest newreponame/myimage:other |
Tag a resource with another tag |
Mac
x64 Builds
| Command | Description |
|---|---|
FROM --platform=linux/amd64 python:3.10-buster |
Build x64 image on Mac Silicon |
export DOCKER_DEFAULT_PLATFORM=linux/amd64 |
Set default platform for Docker builds |
Data Folder
To change it on Linux do this
systemctl stop docker
mkdir -p /root/docker
rsync -aqxP /var/lib/docker/* /root/docker
mv /var/lib/docker/ /var/lib/old-docker/
nano /etc/docker/daemon.json
{
"data-root": "/root/docker"
}
systemctl start docker
