Before moving
forward make sure, you have up and running Docker instance
1) Run a static website in a container
docker run -d seqvence/static-site
So, what happens when you run this command?Since the image doesn't exist on your Docker host, the Docker daemon first fetches it from the registry and then runs it as a containerThe -d flag enables detached mode, which detaches the running container from the terminal/shell and returns your prompt after the container starts
2) Verify if container in running state
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAME
Sb3b30fab0bc2 seqvence/static-site "/bin/sh -c 'cd /u..." 5 seconds ago Up 4 seconds 80/tcp, 443/tcp wizardly_hypatia
3) But running container like in step 1) will not expose ports running in container to host machine. So, we need mention following flags for mapping/publish container ports on Docker Host
- -d will
create a container with the process detached from our terminal
- -P will
publish all the exposed container ports to random ports on the Docker host
- -e is
how you pass environment variables to the container
- --name allows you to specify a container name
- AUTHOR is the environment variable name and Your
Name is
the value that you can pass
docker run --name static-site -e AUTHOR="Your Name" -d
-P seqvence/static-site
4) Now run below command to see how ports are published on docker host
docker port static-site443/tcp -> 0.0.0.0:3276880/tcp -> 0.0.0.0:32769
5) Try running http://docker-host:32768
6) If we need to map/publish custom host port to the container web server. Try running site 2 at the same time with custom port
docker run --name static-site-2 -e AUTHOR="Manoj Kumar" -d -p 8888:80 seqvence/static-site
docker
ps
CONTAINER
ID IMAGE COMMAND CREATED
STATUS PORTS
NAMES
c5d9d6bc66d1
seqvence/static-site "/bin/sh -c 'cd
/u..." 3 seconds ago Up 3 seconds
443/tcp, 0.0.0.0:8888->80/tcp
static-site-2
7) Try
running http://docker-host:8888
NOTE:
If you have stopped container and trying to start container again with
different environment variable, if will through conflict as container
already created and in stopped state. If you want to pass more/updated
environment variables, 1st remove container and start again
