I have installed docker 1.11.2, I am trying to make one private registry for our office.
I followed this link to make private registry, I have successfully pull from localhost but I stuck trying to pull from remote machine.
Short Description of what I have done
Step1 :
docker run -d -p 5000:5000 --restart=always --name registry registry:2
step2:
[root#raj raj]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest c54a2cc56cbb 11 days ago 1.848 kB
registry 2 8ff6a4aae657 4 weeks ago 171.5 MB
step3: (for localhost)
[root#raj raj]# docker tag hello-world localhost:5000/hello-world
[root#raj raj]# docker push localhost:5000/hello-world
The push refers to a repository [localhost:5000/hello-world]
a02596fdd012: Pushed
latest: digest: sha256:a18ed77532f6d6781500db650194e0f9396ba5f05f8b50d4046b294ae5f83aa4 size: 524
step4:
[root#raj raj]# docker pull localhost:5000/hello-world
Using default tag: latest
latest: Pulling from hello-world
Digest: sha256:a18ed77532f6d6781500db650194e0f9396ba5f05f8b50d4046b294ae5f83aa4
Status: Image is up to date for localhost:5000/hello-world:latest
It is working fine
I am trying to pull the image from private registry from remote machine so I have altered the step 3 like below
step3:
[root#raj raj]# docker tag hello-world 192.168.1.23:5000/hello-world
[root#raj raj]# docker push 192.168.1.23:5000/hello-world
The push refers to a repository [192.168.1.23:5000/hello-world]
Get https://192.168.1.23:5000/v1/_ping: tls: oversized record received with length 20527
but it throws error tls:oversized
I have some links related to this issue link1, link2 but it does not resolve my problem
I have some doubt about this link
1) I could not found any docker file in that location /etc/sysconfig/docker, /etc/default/docker for changing –insecure-registry
2) docker -d --insecure-registry 10.11.12.0:5000 (this command is not working it throws below error.
[root#raj raj]# docker -d --insecure-registry 192.168.1.23:5000
flag provided but not defined: -d
See 'docker –help'.
Please help to get pull request from remote machine to private registry.
Follow the sequence of docker command for making private registry
Server Side
docker daemon --insecure-registry server-ip:5000
docker run -d -p 5000:5000 --restart=always --name registry registry:2
docker tag hello-world server-ip:5000/hello-world
docker push server-ip:5000/hello-world
Client side
docker daemon --insecure-registry server-ip:5000
docker pull server-ip:5000/hello-world
Now you can pull/push from your remote repositories, for more detail of registry you can use this command docker inspect registry it will show where the images get store and more info.
Update docker config to add "--insecure-registry", usually the file is located in /etc/default/docker, if you use docker-machine the file is located in /var/lib/boot2docker/profile
In the latest docker version you get unknown flag: --insecure-registry error, do the following:
Edit deamon.json file:
{
"insecure-registries" : [ "server-ip:5000" ]
}
deamon.json file can found in the following path:
Windows: %userprofile%\.docker\daemon.json
Linux: /etc/docker/daemon.json
Restart docker after updating the deamon.json file
Then do the following:
docker run -d -p 5000:5000 --restart=always --name registry registry:2
docker tag hello-world server-ip:5000/hello-world
docker push server-ip:5000/hello-world
Check the newly added image info
http://server-ip:5050/v2/_catalog
Related
I installed a Docker registry to my server like below;
docker run -d -p 5000:5000 --name registry registry:2
So after that I pushed Alpine image to that registry.
docker pull alpine
docker image tag alpine localhost:5000/alpinetest
docker push localhost:5000/alpinetest
So the problem is I want to access this image from another server.
So I can run the command below from client to Docker registry's server;
user#clientserver ~
$ curl 10.10.2.18:5000/v2/_catalog
{"repositories":["alpinetest"]}
So how can I pull this "Alpinetest" image from another "clientserver"?
For example the command below is not working;
user#clientserver ~
$ docker pull 10.10.2.18:5000/alpinetest:latest
Using default tag: latest
Error response from daemon: Get "https://10.10.2.18:5000/v2/": http: server gave HTTP response to HTTPS client
Thanks!
On the machine that wants to pull the image, create or edit /etc/docker/daemon.json and enter this:
{
"insecure-registries": ["10.10.2.18:5000"]
}
and then run:
sudo systemctl restart docker
Just be aware that the registry is, just like it says, insecure. This setup shouldn't be used when the registry is accessed over the internet or in any other environment that you don't have full control over. But it's definitely nice for local tests.
I'm getting possibly incorrect behavior and a bad error message if I run an image if a linked container is not found:
# this works:
> docker run --rm -d --name natsserver nats
> docker run --rm -it --name hello-world --link natsserver hello-world
# now stop natsserver again...
> docker stop natsserver
When I run hello-world again with the same command, I don't understand the first part of the error handling - why does docker try to pull?
> docker run --rm -it --name hello-world --link natsserver hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
Digest: sha256:b8ba256769a0ac28dd126d584e0a2011cd2877f3f76e093a7ae560f2a5301c00
Status: Image is up to date for hello-world:latest
docker: Error response from daemon: could not get container for natsserver: No such container: natsserver.
See 'docker run --help'.
And things get even worse if I try to run an image I have built locally:
> docker build -t nats-logger .
[...]
Successfully tagged nats-logger:latest
> docker run --rm -it --name nats-logger --link=natsserver nats-logger
Unable to find image 'nats-logger:latest' locally
docker: Error response from daemon: pull access denied for nats-logger, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.
So my questions are:
a) Is docker allowed to try to pull in this case, or is this a bad behavior?
b) Is this really a bad error message, or did I miss something?
P.S.: I'm running Docker version 19.03.2, build 6a30dfc on Windows 10.
Is docker allowed to try to pull in this case
Docker will pull image if it is not available on the machine.
Unable to find image 'hello-world:latest' locally
This warning message is not due to linking, it is because hello-world:latest is not exist in your system local images. so whe run docker run it will look on local then will pull from remote if not exist.
Now First thing, Better to use docker-compose instead of Legacy container links.
You can not link the container if it's not running. verify the container natsserver using docker ps and then if it is running then you can link.
docker run --rm -it --name hello-world --link natsserver:my_natserver_host hello-world
Once up you can then check the linking.
docker inspect hello-world | grep -A 1 Links
Legacy container links
Warning: The --link flag is a legacy feature of Docker. It may
eventually be removed. Unless you absolutely need to continue using
it, we recommend that you use user-defined networks to facilitate
communication between two containers instead of using --link. One
feature that user-defined networks do not support that you can do with
--link is sharing environment variables between containers. However, you can use other mechanisms such as volumes to share environment
variables between containers in a more controlled way.
simply try "docker login".
check if your image name is exist in docker hub
and check correct docker build command -> docker build -t image-name .
review the correctness of Docker file script
am trying to run a kubernetes cluster in my local machine.I have Installed kubectl,docker toolbox,minikube and virtual box .
Before docker build:
minikube docker env
Did a docker build and am trying to push the docker image in local registry:
docker run -d -p 5000:5000 --restart=always --name registry registry:2
after which am trying to push the image to local repo
docker tag d3ecb4966f24 X.X.X.X:2376/image
docker push X.X.X.X:2376/image
Error : x509: certificate signed by unknown authority
You got two options:
Bring the registry up with a valid certificate (recommended for production)
Add your registry as insecure in your docker daemons (not recommended for production) :
Dont do this in production, make it secure
Add the following to daemon.json
{
"insecure-registries" : ["X.X.X.X:2376"]
}
Restart docker daemon
In this question it turned out, that I cannot use the sha256 mechanism in the FROM line in a Dockerfile to verify I am using the correct locally built non-DockerHub image in another derived image.
Is there another way to verify locally built Docker images? Some best practice maybe?
From docs:
By default, docker pull pulls images from Docker Hub. It is also
possible to manually specify the path of a registry to pull from
You can start a private docker registry on you localhost with the following command:
docker run -d -p 5000:5000 --restart=always --name registry registry:2
Say your image name isubuntu Then push image to that specific registry with:
docker push localhost:5000/ubuntu
In your Dockerfile you can use:
From localhost:5000/ubuntu
I created two Docker containers. The first one provides a private Docker registry and the second one is a mirror of the official Docker registry:
docker run -d --name registry -v /local/path/to/registry:/registry -e SETTINGS_FLAVOR=local -e STORAGE_PATH=/registry -p 5000:5000 registry
docker run -d --name mirror -v /local/path/to/mirror:/registry -e STORAGE_PATH=/registry -e STANDALONE=false -e MIRROR_SOURCE=https:/registry-1.docker.io -e MIRROR_SOURCE_INDEX=https://index.docker.io -p 5555:5000 registry
Now I would like to combine both. Whenever a user pulls images it should first query the private registry and then the mirror. And when images are pushed they should only be pushed to the private registry.
I do not have an idea about how this can be done. Any help is appreciated.
You cannot just force all docker push commands to push to your private registry. One reason is that you can have any number of those registers. You have to first tell docker where to push by tagging the image (see lower).
Here is how you can setup docker hosts to work with a running private registry and local mirror.
Client set-up
Lets assume that you are running both mirror and private registry on (resolvable) host called dockerstore. Mirror on port 5555, registry on 5000.
Then on client machine(s) you should pass extra options to docker daemon startup. In your case:
Add --registry-mirror=http://dockerstore:5555 to tell daemon to prefer using local mirror rather then dockerhub. source
Add --insecure-registry dockerstore:5000 to access the private registry without further configuration. See this answer
Restart docker daemon
Using the mirror
When you pull any image the first source will be the local mirror. You can confirm by running a docker pull, e.g.
docker pull debian
In the output there will be message that image is being pulled from your mirror - dockerstore:5000
Using local registry
In order to push to private registry first you have to tag the image to be pushed with full name of the registry. Make sure that you have a dot or colon in the first part of the tag, to tell docker that image should be pushed to private registry.
Docker looks for either a “.” (domain separator) or “:” (port separator) to learn that the first part of the repository name is a location and not a user name.
Example:
Tag 30d39e59ffe2 image as dockerstore:5000/myapp:stable
docker tag 30d39e59ffe2 dockerstore:5000/myapp:stable
Push it to private registry
docker push dockerstore:5000/myapp:stable
Then you can pull as well
docker pull dockerstore:5000/myapp:stable
If not present, create the file:
sudo nano /etc/docker/daemon.json
Then paste the following:
{
"registry-mirrors": [
"https://hub-mirror.c.163.com",
"https://mirror.baidubce.com"
]
}
Then retart Docker daemon
$ sudo systemctl restart docker
[Source]
Just to be clear, docker documentation confirms that:
It’s currently not possible to mirror another private registry. Only
the central Hub can be mirrored.
Repository names are intended to be global, that is the repository redis always refers to the official Redis image from the Docker Hub. If you want to use a private registry, you prefix the repository name with the name of the registry e.g. localhost.localdomain:5000/myimage:mytag.
So when you pull or push, it will automatically go to the relevant registry. The mirror should be easy to set up, you just pass the URL to the daemon with the --registry-mirror= argument.
This isn't perfect for enterprise users, hence this (closed) Docker issue.