Docker concept

What is docker
init d
system d ( sherbimi cili menaxhon te gjitha serviset) ⇒user space (premission)
cri (container run interface) → cli tool
cni (container network interface)
volumes
docker registies → storage and distribution system for docker images
they create officials images
keep in mind you can look on the dockerhub to find officail images
like redis /sql etc..
main docker commands
to download images docker pull and the name of the image
: use for specifying the version of image
by deafult docker.io has all the images that we have download
docker images chechk the images that are installed

→to run use the command docker run and the name of the image and the version and this starts the cotainer

d you will see the container logs
→ docker ps shows the container that are running
-d stands for detach and runs the container without blocking the terminal
docker logs and the container id used to see the docker logs
docker it has docker isolated network
port binding is accesing container lik it is on my local host
docker stop and conatainer name stops the docker container
-p publish the container
for exp dcoker run -d -p 9000:80 and the name like ngnx so i can i acces the docker cointainer like it is on my local host
docker run actually creates a new container and it doesnt re-use the previous container
docker start and thew id of the container re start the the pre-created container
--name provides the specific name for our container
private docker registries are images that are cretated by company or anyone that they don't want to you to get it
docker reporsitor is to collect related images with same name but with different versions
our build docker images
simplified are called docker file
for example
from (this app):and the version
run will exxecute any command in a shell inside a container
for example
run python3 install for pyqt5
copy copies the files from <source> and adds them to the container
command is like : copy python.file /app/
copy src /app/
workdir sets the working directory for all the following commands
like workdir /app
cmd executes the instauction that is to be executed when a docker container starts
and there be only one "cmd: instuction in a docker file
for emaple
cmd [" python, “and the procduct "]
docker build builds the conatiner
-t is tag sets a name and optionally tag in the name:tag format