I created docker a docker image of a spring boot application using the below command
docker build -f Dockerfile -t myimage
once i run the command "docker images" I see that image. Now I want to get that image out my local machine and run on another machine using the below command.
docker run -p 8085:8085 myimage
What are the steps to relocate docker image to another machine over a physical medium?
/var/lib/docker/images/overlay2/imagedb/content
but that local contain .txt files of 6KB. I know normally a docker image is around 600MB in size.
Could anyone please help me to find the exact location.
Thank you
1.You can export your docker image after building it.
docker build -f Dockerfile -t myimage .
docker save myimage > myimage.tar You will see this in your directory where you execute docker build command.
Then you can load it anywhere else as
docker load < myimage.tar
Other than that if there is a docker repo , you can simply push the docker image.
Reference:- https://docs.docker.com/engine/reference/commandline/export/#options
2.If the other machine can be reachable via a network you can setup the other machine as a docker hub
Related
I created a pipeline for spring boot microservice project. I am automating the deployment process using jenkin pipeline.
The steps which I used in pipeline as follows:
Jenkin script first checkout code from bitbucket.
Build a project using maven.
Create a docker image.
Push docker image to dockerhub.
Then run this docker image by downloading docker image from docker hub.
It works perfectly one time. It would works second time as I need to stop docker conatiner and then remove image from there.
.
I used docker run -rm According to documentation -rm is used to removed image form docker. But this not working any one help me out in this case
docker run --rm -p 8761:8761 -d --name ccpserviceregistry mydockerRepo/ccpserviceregistry:1.0
Want to redeploye the image with latest one .
Follow these steps:
Checkout code from bitbucket
Build project using maven
Create docker image
Push docker image to dockerhub
Remove if any docker container already running docker rm -f container-name
Remove docker image if you want to if any (docker rmi -f image-name)
Run docker image (use --name option in docker run so that it will be easier while removing the container, no need to provide --rm option)
Hope this helps.
I am trying to build a new docker image.
docker build . -t tg
.....
.....
Removing intermediate container ba85d1deadeb
---> 353fcb84af6b
Successfully built 353fcb84af6b
Successfully tagged tg:latest
But for some reason, after it is successfully built I could neither run it nor find it.
docker images
<none> <none> c18e928477c3 11 days ago 1.01GB
...... a long list of unrelated images that are intermediate steps of the built process .....
docker image ls , docker images -a aren't helping either.
sudo docker run -i -t 353fcb84af6b
Unable to find image '353fcb84af6b:latest' locally
docker: Error response from daemon: pull access denied for 353fcb84af6b, repository does not exist or may require 'docker login'.
See 'docker run --help'.
when running docker run -i -t tg:latest result is the same.
The issue seems to be specific to THIS particular image... Other successfully built images DO show up after running docker images.
Dockerfile
Any pointers are much appreciated.
On linux
try:
docker buildx build --progress=plain --load .
1- In order to run docker commands, use sudo user.
WHY -> The docker daemon binds to a Unix socket instead of a TCP port. By default that Unix socket is owned by the user root and other users can only access it using sudo.
Get your images build with sudo docker build -t tag_name --no-cache .
To see the images - sudo docker images
Also, you cannot use tag with image ID - Unable to find image '353fcb84af6b:latest' locally
In order to run your image, you can either use JUST image ID or image_name:tag.
I am using ubuntu 18.04
I have docker-ce installed
I have a file named Dockerfile
I didn't have any other files
how can I start using this container
Firstly you need to build an image from Dockerfile. To do this:
Go to the directory containing Dockerfile
Run (change <image_name> to some meaningful name): docker build -t <image_name> .
After image is built we can finally run it: docker run -it <image_name>
There multiple options how the image can be run so I encourage you to read some docs.
I'm a Docker beginner. I have pull and configured, installed Prestashop in my docker container.
I would like to build an image with this config.
How can I do?
Thanks.
To build a container you would have to run docker build -t myawsome_container:1.0.0 . (providing that you are in the directory where your Dockerfile is located)
Now to run your container you would want to run docker run myawsome_container:1.0.0
I am getting into Docker and am trying to better understand how it works out there in the "real world".
It occurs to me that, in practice:
You need a way to version Docker images
You need a way to tell the Docker engine (running on a VM) to stop/start/restart a particular container
You need a way to tell the Docker engine which version of a image to run
Does Docker ship with built-in commands for handling each of these? If not what tools/strategies are used for accomplishing them? Also, when I build a Docker image (via, say, docker build -t myapp .), what file type is produced and where is it located on the machine?
docker has all you need to build images and run containers. You can create your own image by writing a Dockerfile or by pulling it from the docker hub.
In the Dockerfile you specify another image as the basis for your image, run command install things. Images can have tags, for example the ubuntu image can have the latest or 12.04 tag, that can be specified with ubuntu:latest notation.
Once you have built the image with docker build -t image-name . you can create containers from that image with `docker run --name container-name image-name.
docker ps to see running containers
docker rm <container name/id> to remove containers
Suppose we have a docker file like bellow:
->Build from git without versioning:
sudo docker build https://github.com/lordash/mswpw.git#fecomments:comments
in here:
fecomments is branch name and comments is the folder name.
->building from git with tag and version:
sudo docker build https://github.com/lordash/mswpw.git#fecomments:comments -t lordash/comments:v1.0
->Now if you want to build from a directory: first go to comments directory the run command sudo docker build .
->if you want to add tag you can use -t or -tag flag to do that:
sudo docker build -t lordash . or sudo docker build -t lordash/comments .
-> Now you can version your image with the help of tag:
sudo docker build -t lordash/comments:v1.0 .
->you can also apply multiple tag to an image:
sudo docker build -t lordash/comments:latest -t lordash/comments:v1.0 .