docker pull imagename
docker image pull alpine:3.6 # Just pulls the image, doens't run (dont create a contianer)
docker search httpd # by default gives 25 lines
docker search --limit=2
docker search --filter stars=10 -h
docker search --filter is-official=true httpd
docker images --filter=reference='alpine'
docker pull imagename
docker image pull alpine:3.6 # Just pulls the image, doens't run (dont create a contianer)
# List image name by tag
docker images alpine:3.6
# List full length Image ID:
docker images --no-trunc
# List out Images with Filter
docker images --filter=reference='alpine'
# Inspect image details
docker inspect alpine:3.6
# Custom ubuntu Image >> commit
$ docker container run -it --rm --name ubuntucon ubuntu:16.04 /bin/bash
Inside the docker container run the check if ipconfing, ping are available, if now execute the below commands
$ apt update -y
$ apt install iputils-ping wget curl net-tools -y
After installation test with ping and curl , ifconfig commands
Now ctrl + p +q to come out of the container
$ docker container commit <contianer_id> devopswithcloudhub/ubuntucustom:<tag_name>
docker export <container_id> > customubuntu.tar
docker import - sivaimage < customubuntu.tar
# Custom Image >> Ubuntu VM > Springboot app
Docker can build images by reading instructions from a Dockerfile
Lets take one more application as an example
* This application is based on java
* This application runs on port 8080
sudo apt update -y
sudo apt install maven
sudo apt-cache search openjdk
apt install openjdk-8-jdk
java -jar target/*.jar
# Spring boot inside container
docker run -it -p 8080:8080 --name springubuntu ubuntu:18.04
apt update
apt install openjdk-8-jdk -y
ctrl p+q
docker container cp *.jar springubuntu:/
docker attach springubuntu
java -jar *.jar
ctrl p+q
# Creating an image now out of container
docker commit springubuntu springubuntuimage:new
docker run -it -p 8090:8080 --name springnew springubuntuimage:new
docker attach springnew
java -jar *.jar
# Exporting a container to a tar file
docker export <container_id> > springcontainer.tar
# Importing tar as an image
docker import - springimage < springcontianer.tar
#Creating an image from the above image
docker run -dit -p 8090:8080 --name tarcontainer springimage /bin/bash
# Creting an tar file from an image
docker save -o mynginx1.tar nginx
docker rmi nginx
loading image back from tar dfile
docker load < mynginx1.tar# image diffence
FROM ubuntu:18.04
RUN apt update