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Merge pull request #23195 from cyli/update-content-trust-docs

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Update content trust docs to reflect latest notary compose file changes
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Sebastiaan van Stijn 2016-06-13 22:11:32 +02:00 committed by GitHub
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docs/security/trust/trust_sandbox.md
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@ -21,186 +21,128 @@ overview](content_trust.md).
These instructions assume you are running in Linux or Mac OS X. You can run
this sandbox on a local machine or on a virtual machine. You will need to
have `sudo` privileges on your local machine or in the VM.
have privileges to run docker commands on your local machine or in the VM.
This sandbox requires you to install two Docker tools: Docker Engine and Docker
Compose. To install the Docker Engine, choose from the [list of supported
platforms](../../installation/index.md). To install Docker Compose, see the
This sandbox requires you to install two Docker tools: Docker Engine >= 1.10.0
and Docker Compose >= 1.6.0. To install the Docker Engine, choose from the
[list of supported platforms](../../installation/index.md). To install
Docker Compose, see the
[detailed instructions here](https://docs.docker.com/compose/install/).
Finally, you'll need to have `git` installed on your local system or VM.
Finally, you'll need to have a text editor installed on your local system or VM.
## What is in the sandbox?
If you are just using trust out-of-the-box you only need your Docker Engine
client and access to the Docker hub. The sandbox mimics a
production trust environment, and requires these additional components:
production trust environment, and sets up these additional components.
| Container | Description |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------|
| notarysandbox | A container with the latest version of Docker Engine and with some preconfigured certifications. This is your sandbox where you can use the `docker` client to test trust operations. |
| trustsandbox | A container with the latest version of Docker Engine and with some preconfigured certificates. This is your sandbox where you can use the `docker` client to test trust operations. |
| Registry server | A local registry service. |
| Notary server | The service that does all the heavy-lifting of managing trust |
| Notary signer | A service that ensures that your keys are secure. |
| MySQL | The database where all of the trust information will be stored |
The sandbox uses the Docker daemon on your local system. Within the `notarysandbox`
you interact with a local registry rather than the Docker Hub. This means
your everyday image repositories are not used. They are protected while you play.
This means you will be running your own content trust (Notary) server and registry.
If you work exclusively with the Docker Hub, you would not need with these components.
They are built into the Docker Hub for you. For the sandbox, however, you build
your own entire, mock production environment.
Within the `trustsandbox` container, you interact with your local registry rather
than the Docker Hub. This means your everyday image repositories are not used.
They are protected while you play.
When you play in the sandbox, you'll also create root and repository keys. The
sandbox is configured to store all the keys and files inside the `notarysandbox`
sandbox is configured to store all the keys and files inside the `trustsandbox`
container. Since the keys you create in the sandbox are for play only,
destroying the container destroys them as well.
By using a docker-in-docker image for the `trustsandbox` container, you will also
not pollute your real docker daemon cache with any images you push and pull. The
images will instead be stored in an anonymous volume attached to this container,
and can be destroyed after you destroy the container.
## Build the sandbox
In this section, you build the Docker components for your trust sandbox. If you
work exclusively with the Docker Hub, you would not need with these components.
They are built into the Docker Hub for you. For the sandbox, however, you must
build your own entire, mock production environment and registry.
### Configure /etc/hosts
The sandbox' `notaryserver` and `sandboxregistry` run on your local server. The
client inside the `notarysandbox` container connects to them over your network.
So, you'll need an entry for both the servers in your local `/etc/hosts` file.
1. Add an entry for the `notaryserver` to `/etc/hosts`.
$ sudo sh -c 'echo "127.0.0.1 notaryserver" >> /etc/hosts'
2. Add an entry for the `sandboxregistry` to `/etc/hosts`.
$ sudo sh -c 'echo "127.0.0.1 sandboxregistry" >> /etc/hosts'
In this section, you'll use Docker Compose to specify how to set up and link together
the `trustsandbox` container, the Notary server, and the Registry server.
### Build the notarytest image
1. Create a new `trustsandbox` directory and change into it.
1. Create a `notarytest` directory on your system.
$ mkdir `trustsandbox`
$ cd `trustsandbox`
$ mkdir notarysandbox
2. Create a filed called `docker-compose.yml` with your favorite editor. For example, using vim:
2. Change into your `notarysandbox` directory.
$ touch docker-compose.yml
$ vim docker-compose.yml
$ cd notarysandbox
3. Add the following to the new file.
3. Create a `notarytest` directory then change into that.
version: "2"
services:
notaryserver:
image: dockersecurity/notary_autobuilds:server-v0.3.0
volumes:
- notarycerts:/go/src/github.com/docker/notary/fixtures
networks:
- sandbox
environment:
- NOTARY_SERVER_STORAGE_TYPE=memory
- NOTARY_SERVER_TRUST_SERVICE_TYPE=local
sandboxregistry:
image: registry:2.4.1
networks:
- sandbox
container_name: sandboxregistry
trustsandbox:
image: docker:dind
networks:
- sandbox
volumes:
- notarycerts:/notarycerts
privileged: true
container_name: trustsandbox
entrypoint: ""
command: |-
sh -c '
cp /notarycerts/root-ca.crt /usr/local/share/ca-certificates/root-ca.crt &&
update-ca-certificates &&
dockerd-entrypoint.sh --insecure-registry sandboxregistry:5000'
volumes:
notarycerts:
external: false
networks:
sandbox:
external: false
$ mkdir notarytest
$ cd notarytest
4. Save and close the file.
4. Create a filed called `Dockerfile` with your favorite editor.
5. Add the following to the new file.
FROM debian:jessie
ADD https://master.dockerproject.org/linux/amd64/docker /usr/bin/docker
RUN chmod +x /usr/bin/docker \
&& apt-get update \
&& apt-get install -y \
tree \
vim \
git \
ca-certificates \
--no-install-recommends
WORKDIR /root
RUN git clone -b trust-sandbox https://github.com/docker/notary.git
RUN cp /root/notary/fixtures/root-ca.crt /usr/local/share/ca-certificates/root-ca.crt
RUN update-ca-certificates
ENTRYPOINT ["bash"]
6. Save and close the file.
7. Build the testing container.
$ docker build -t notarysandbox .
Sending build context to Docker daemon 2.048 kB
Step 1 : FROM debian:jessie
...
Successfully built 5683f17e9d72
### Build and start up the trust servers
In this step, you get the source code for your notary and registry services.
Then, you'll use Docker Compose to build and start them on your local system.
1. Change to back to the root of your `notarysandbox` directory.
$ cd notarysandbox
2. Clone the `notary` project.
$ git clone -b trust-sandbox https://github.com/docker/notary.git
3. Clone the `distribution` project.
$ git clone https://github.com/docker/distribution.git
4. Change to the `notary` project directory.
$ cd notary
The directory contains a `docker-compose` file that you'll use to run a
notary server together with a notary signer and the corresponding MySQL
databases. The databases store the trust information for an image.
5. Build the server images.
$ docker-compose build
The first time you run this, the build takes some time.
6. Run the server containers on your local system.
5. Run the containers on your local system.
$ docker-compose up -d
Once the trust services are up, you'll setup a local version of the Docker
Registry v2.
The first time you run this, the docker-in-docker, Notary server, and registry
images will be first downloaded from Docker Hub.
7. Change to the `notarysandbox/distribution` directory.
8. Build the `sandboxregistry` server.
$ docker build -t sandboxregistry .
9. Start the `sandboxregistry` server running.
$ docker run -p 5000:5000 --name sandboxregistry sandboxregistry &
## Playing in the sandbox
Now that everything is setup, you can go into your `notarysandbox` container and
start testing Docker content trust.
Now that everything is setup, you can go into your `trustsandbox` container and
start testing Docker content trust. From your host machine, obtain a shell
in the `trustsandbox` container.
### Start the notarysandbox container
In this procedure, you start the `notarysandbox` and link it to the running
`notary_notaryserver_1` and `sandboxregistry` containers. The links allow
communication among the containers.
```
$ docker run -it -v /var/run/docker.sock:/var/run/docker.sock --link notary_notaryserver_1:notaryserver --link sandboxregistry:sandboxregistry notarysandbox
root@0710762bb59a:/#
```
Mounting the `docker.sock` gives the `notarysandbox` access to the `docker`
daemon on your host, while storing all the keys and files inside the sandbox
container. When you destroy the container, you destroy the "play" keys.
$ docker exec -it trustsandbox sh
/ #
### Test some trust operations
Now, you'll pull some images.
Now, you'll pull some images from within the `trustsandbox` container.
1. Download a `docker` image to test with.
# docker pull docker/trusttest
/ # docker pull docker/trusttest
docker pull docker/trusttest
Using default tag: latest
latest: Pulling from docker/trusttest
@ -212,34 +154,34 @@ Now, you'll pull some images.
2. Tag it to be pushed to our sandbox registry:
# docker tag docker/trusttest sandboxregistry:5000/test/trusttest:latest
/ # docker tag docker/trusttest sandboxregistry:5000/test/trusttest:latest
3. Enable content trust.
# export DOCKER_CONTENT_TRUST=1
/ # export DOCKER_CONTENT_TRUST=1
4. Identify the trust server.
# export DOCKER_CONTENT_TRUST_SERVER=https://notaryserver:4443
/ # export DOCKER_CONTENT_TRUST_SERVER=https://notaryserver:4443
This step is only necessary because the sandbox is using its own server.
Normally, if you are using the Docker Public Hub this step isn't necessary.
5. Pull the test image.
# docker pull sandboxregistry:5000/test/trusttest
/ # docker pull sandboxregistry:5000/test/trusttest
Using default tag: latest
no trust data available
Error: remote trust data does not exist for sandboxregistry:5000/test/trusttest: notaryserver:4443 does not have trust data for sandboxregistry:5000/test/trusttest
You see an error, because this content doesn't exist on the `sandboxregistry` yet.
You see an error, because this content doesn't exist on the `notaryserver` yet.
6. Push the trusted image.
6. Push and sign the trusted image.
# docker push sandboxregistry:5000/test/trusttest:latest
The push refers to a repository [sandboxregistry:5000/test/trusttest] (len: 1)
a9539b34a6ab: Image successfully pushed
b3dbab3810fc: Image successfully pushed
latest: digest: sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c size: 3348
/ # docker push sandboxregistry:5000/test/trusttest:latest
The push refers to a repository [sandboxregistry:5000/test/trusttest]
5f70bf18a086: Pushed
c22f7bc058a9: Pushed
latest: digest: sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926 size: 734
Signing and pushing trust metadata
You are about to create a new root signing key passphrase. This passphrase
will be used to protect the most sensitive key in your signing system. Please
@ -247,25 +189,24 @@ Now, you'll pull some images.
key file itself secure and backed up. It is highly recommended that you use a
password manager to generate the passphrase and keep it safe. There will be no
way to recover this key. You can find the key in your config directory.
Enter passphrase for new root key with id 8c69e04:
Repeat passphrase for new root key with id 8c69e04:
Enter passphrase for new repository key with id sandboxregistry:5000/test/trusttest (93c362a):
Repeat passphrase for new repository key with id sandboxregistry:5000/test/trusttest (93c362a):
Enter passphrase for new root key with ID 27ec255:
Repeat passphrase for new root key with ID 27ec255:
Enter passphrase for new repository key with ID 58233f9 (sandboxregistry:5000/test/trusttest):
Repeat passphrase for new repository key with ID 58233f9 (sandboxregistry:5000/test/trusttest):
Finished initializing "sandboxregistry:5000/test/trusttest"
latest: digest: sha256:d149ab53f8718e987c3a3024bb8aa0e2caadf6c0328f1d9d850b2a2a67f2819a size: 3355
Signing and pushing trust metadata
Successfully signed "sandboxregistry:5000/test/trusttest":latest
Because you are pushing this repository for the first time, docker creates new root and repository keys and asks you for passphrases with which to encrypt them. If you push again after this, it will only ask you for repository passphrase so it can decrypt the key and sign again.
7. Try pulling the image you just pushed:
# docker pull sandboxregistry:5000/test/trusttest
/ # docker pull sandboxregistry:5000/test/trusttest
Using default tag: latest
Pull (1 of 1): sandboxregistry:5000/test/trusttest:latest@sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c
sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c: Pulling from test/trusttest
b3dbab3810fc: Already exists
a9539b34a6ab: Already exists
Digest: sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c
Status: Downloaded newer image for sandboxregistry:5000/test/trusttest@sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c
Tagging sandboxregistry:5000/test/trusttest@sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c as sandboxregistry:5000/test/trusttest:latest
Pull (1 of 1): sandboxregistry:5000/test/trusttest:latest@sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926
sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926: Pulling from test/trusttest
Digest: sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926
Status: Downloaded newer image for sandboxregistry:5000/test/trusttest@sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926
Tagging sandboxregistry:5000/test/trusttest@sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926 as sandboxregistry:5000/test/trusttest:latest
### Test with malicious images
@ -274,49 +215,64 @@ What happens when data is corrupted and you try to pull it when trust is
enabled? In this section, you go into the `sandboxregistry` and tamper with some
data. Then, you try and pull it.
1. Leave the sandbox container running.
1. Leave the `trustsandbox` shell and and container running.
2. Open a new bash terminal from your host into the `sandboxregistry`.
2. Open a new interactive terminal from your host, and obtain a shell into the
`sandboxregistry` container.
$ docker exec -it sandboxregistry bash
296db6068327#
root@65084fc6f047:/#
3. Change into the registry storage.
3. List the layers for the `test/trusttest` image you pushed:
You'll need to provide the `sha` you received when you pushed the image.
root@65084fc6f047:/# ls -l /var/lib/registry/docker/registry/v2/repositories/test/trusttest/_layers/sha256
total 12
drwxr-xr-x 2 root root 4096 Jun 10 17:26 a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
drwxr-xr-x 2 root root 4096 Jun 10 17:26 aac0c133338db2b18ff054943cee3267fe50c75cdee969aed88b1992539ed042
drwxr-xr-x 2 root root 4096 Jun 10 17:26 cc7629d1331a7362b5e5126beb5bf15ca0bf67eb41eab994c719a45de53255cd
# cd /var/lib/registry/docker/registry/v2/blobs/sha256/aa/aac0c133338db2b18ff054943cee3267fe50c75cdee969aed88b1992539ed042
4. Change into the registry storage for one of those layers (note that this is in a different directory)
4. Add malicious data to one of the trusttest layers:
root@65084fc6f047:/# cd /var/lib/registry/docker/registry/v2/blobs/sha256/aa/aac0c133338db2b18ff054943cee3267fe50c75cdee969aed88b1992539ed042
# echo "Malicious data" > data
5. Add malicious data to one of the trusttest layers:
5. Got back to your sandbox terminal.
root@65084fc6f047:/# echo "Malicious data" > data
6. List the trusttest image.
6. Go back to your `trustsandbox` terminal.
# docker images | grep trusttest
docker/trusttest latest a9539b34a6ab 7 weeks ago 5.025 MB
sandboxregistry:5000/test/trusttest latest a9539b34a6ab 7 weeks ago 5.025 MB
sandboxregistry:5000/test/trusttest <none> a9539b34a6ab 7 weeks ago 5.025 MB
7. List the trusttest image.
7. Remove the `trusttest:latest` image.
/ # docker images | grep trusttest
REPOSITORY TAG IMAGE ID CREATED SIZE
docker/trusttest latest cc7629d1331a 11 months ago 5.025 MB
sandboxregistry:5000/test/trusttest latest cc7629d1331a 11 months ago 5.025 MB
sandboxregistry:5000/test/trusttest <none> cc7629d1331a 11 months ago 5.025 MB
# docker rmi -f a9539b34a6ab
8. Remove the `trusttest:latest` image from our local cache.
/ # docker rmi -f cc7629d1331a
Untagged: docker/trusttest:latest
Untagged: sandboxregistry:5000/test/trusttest:latest
Untagged: sandboxregistry:5000/test/trusttest@sha256:1d871dcb16805f0604f10d31260e79c22070b35abc71a3d1e7ee54f1042c8c7c
Deleted: a9539b34a6aba01d3942605dfe09ab821cd66abf3cf07755b0681f25ad81f675
Deleted: b3dbab3810fc299c21f0894d39a7952b363f14520c2f3d13443c669b63b6aa20
Untagged: sandboxregistry:5000/test/trusttest@sha256:ebf59c538accdf160ef435f1a19938ab8c0d6bd96aef8d4ddd1b379edf15a926
Deleted: sha256:cc7629d1331a7362b5e5126beb5bf15ca0bf67eb41eab994c719a45de53255cd
Deleted: sha256:2a1f6535dc6816ffadcdbe20590045e6cbf048d63fd4cc753a684c9bc01abeea
Deleted: sha256:c22f7bc058a9a8ffeb32989b5d3338787e73855bf224af7aa162823da015d44c
8. Pull the image again.
Docker does not re-download images that it already has cached, but we want
Docker to attempt to download the tampered image from the registry and reject
it because it is invalid.
# docker pull sandboxregistry:5000/test/trusttest
8. Pull the image again. This will download the image from the registry, because we don't have it cached.
/ # docker pull sandboxregistry:5000/test/trusttest
Using default tag: latest
...
b3dbab3810fc: Verifying Checksum
a9539b34a6ab: Pulling fs layer
filesystem layer verification failed for digest sha256:aac0c133338db2b18ff054943cee3267fe50c75cdee969aed88b1992539ed042
Pull (1 of 1): sandboxregistry:5000/test/trusttest:latest@sha256:35d5bc26fd358da8320c137784fe590d8fcf9417263ef261653e8e1c7f15672e
sha256:35d5bc26fd358da8320c137784fe590d8fcf9417263ef261653e8e1c7f15672e: Pulling from test/trusttest
aac0c133338d: Retrying in 5 seconds
a3ed95caeb02: Download complete
error pulling image configuration: unexpected EOF
You'll see the pull did not complete because the trust system was
unable to verify the image.
@ -328,4 +284,10 @@ feel free to play with it and see how it behaves. If you find any security
issues with Docker, feel free to send us an email at <security@docker.com>.
&nbsp;
## Cleaning up your sandbox
When you are done, and want to clean up all the services you've started and any
anonymous volumes that have been created, just run the following command in the
directory where you've created your Docker Compose file:
$ docker-compose down -v