sdc-docker

A Docker Engine for SmartDataCenter, where the data center is exposed as a single Docker host. The Docker remote API is served from a "docker" core SDC zone built from this repo.

User Guide

For users of the beta service in Joyent's public cloud, or those using an SDC Docker stand up, but not administering it, please see the User Guide. The rest of this README is targetted at development of sdc-docker.

Current State

Many commands are currently at least partially implemented. See docs/divergence.md for details on where sdc-docker diverges from Docker Inc's docker. While Joyent has deployed this into early access, this software is still under active development and should be used in production with care.

Installation

Note: Examples in this section are for CoaL. However the only thing CoaL-specific is the IP for the headnode (root@10.99.99.7). For example, you could do the same on Joyent Engineering's internal "nightly-1" DC with "root@172.26.1.4".

Installing sdc-docker and supporting services:

ssh root@10.99.99.7 # ssh to the CoaL GZ sdcadm self-update sdcadm post-setup common-external-nics && sleep 10 # imgapi needs external sdcadm post-setup dev-headnode-prov sdcadm post-setup cloudapi sdcadm experimental update-docker

Optional additional steps for VXLAN setup.

sdcadm experimental portolan sdcadm experimental fabrics --coal

SDC Docker uses (as of DOCKER-312) TLS by default. That means you need to setup a user (or use the 'admin' user) and add an SSH key for access.

Create a test user (we'll use "jill"):

 # On your dev machine, create a key
 ssh-keygen -t rsa -f ~/.ssh/sdc-docker-jill.id_rsa -b 2048 -N ""

 # Copy it to COAL so we can add it to the 'jill' account.
 scp ~/.ssh/sdc-docker-jill.id_rsa.pub root@10.99.99.7:/var/tmp/

 ssh root@10.99.99.7      # ssh to the CoaL GZ
 sdc-useradm create -A login=jill email=jill@localhost userpassword=secret123
 sdc-useradm add-key jill /var/tmp/sdc-docker-jill.id_rsa.pub

Generate a client TLS certificate and set docker to use --tls mode:

This script in the sdc-docker repo will create the client certificate and print how to configure docker:
```
 ./tools/sdc-docker-setup.sh coal jill ~/.ssh/sdc-docker-jill.id_rsa
```
This also puts the env setup in "~/.sdc/docker/jill/env.sh".
```
 source ~/.sdc/docker/jill/env.sh
```

You should now able to get docker info and see "SDCAccount: jill":

$ docker info
Containers: 0
Images: 0
Storage Driver: sdc
 SDCAccount: jill
Execution Driver: sdc-0.1.0
Operating System: SmartDataCenter
Name: coal

Running SDC docker in invite-only mode

The public APIs to an SDC -- sdc-docker and cloudapi -- can be configured to be in invite-only mode where only explicitly allowed accounts are given authorized. This mode is configured via the account_allowed_dcs SDC Application config var.

sdc-sapi /applications/$(sdc-sapi /applications?name=sdc | json -H 0.uuid) \
    -X PUT -d '{"metadata": {"account_allowed_dcs": true}}'
# Optional "403 Forbidden" response body.
sdc-sapi /applications/$(sdc-sapi /applications?name=sdc | json -H 0.uuid) \
    -X PUT -d '{"metadata": {"account_allowed_dcs_msg": "talk to your Administrator"}}'

Once enabled, one can allow an account via:

DC=$(sh /lib/sdc/config.sh -json | json datacenter_name)
sdc-useradm add-attr LOGIN allowed_dcs $DC

and an account access removed via:

sdc-useradm delete-attr LOGIN allowed_dcs $DC

Allowed users can be listed via:

sdc-useradm search allowed_dcs=$DC -o uuid,login,email,allowed_dcs

For example:

[root@headnode (coal) ~]# sdc-useradm add-attr admin allowed_dcs coal
Added attribute on user 930896af-bf8c-48d4-885c-6573a94b1853 (admin): allowed_dcs=coal

[root@headnode (coal) ~]# sdc-useradm search allowed_dcs=coal -o uuid,login,email,allowed_dcs
UUID                                  LOGIN  EMAIL           ALLOWED_DCS
930896af-bf8c-48d4-885c-6573a94b1853  admin  root@localhost  ["us-west-2","coal"]

[root@headnode (coal) ~]# sdc-useradm delete-attr admin allowed_dcs coal
Deleted attribute "allowed_dcs=coal" from user 930896af-bf8c-48d4-885c-6573a94b1853 (admin)

Limitation: Currently adding access can take a minute or two to take effect (caching) and removing access requires the sdc-docker server to be restarted (DOCKER-233).

Adding packages

By default the size of the container (ram, disk, cpu shares) uses the package in the internal "sdc_" set of packages closest to 'ram=1024 MiB'. The "sdc_" packages are really only applicable for development. More appropriate for production is a set of packages separate from "sdc_". The following can be run to add a number of "t4-*" packages and to configure the Docker service to use them:

sdc-login docker /opt/smartdc/docker/tools/gen_packages.js
/opt/smartdc/bin/sapiadm update \
   $(/opt/smartdc/bin/sdc-sapi /services?name=docker | json -H 0.uuid) \
   metadata.PACKAGE_PREFIX="t4-"

Development hooks

Before commiting be sure to:

make check      # lint and style checks
make test       # run unit tests

A good way to do that is to install the stock pre-commit hook in your clone via:

make git-hooks

Testing

As shown above, the run unit tests locally:

make test

To run integration tests, you need to call the "test/runtests" driver from the global zone (GZ) of a SmartDataCenter setup with sdc-docker, e.g. with COAL that would be:

ssh root@10.99.99.7
/zones/$(vmadm lookup -1 alias=docker0)/root/opt/smartdc/docker/test/runtests

specifically for COAL there is a target for that:

make test-integration-in-coal

To run (a) a particular subset of integration tests -- using 'info' as a filter on test names in this example -- and (b) with trace-level logging:

LOG_LEVEL=trace /zones/$(vmadm lookup -1 alias=docker0)/root/opt/smartdc/docker/test/runtests -f info 2>&1 | bunyan

Some integration tests (those that don't depend on running in the GZ) can be run from your Mac dev tree, e.g.:

./test/runtest ./test/integration/info.test.js

Official docker test suite

Docker have their own test suite integration-cli for testing a real docker environment. To run the docker cli tests against coal, you will need a local docker binary and go (golang) installed, then do the following:

# Target coal
export DOCKER_HOST=tcp://10.88.88.6
export DOCKER_TEST_HOST=tcp://10.88.88.6

# Set go path, so `go get` works correctly
mkdir go && cd go
export GOPATH=`pwd`

# Checkout docker from git
mkdir -p src/github.com/docker
cd src/github.com/docker
git clone https://github.com/docker/docker.git
cd docker

# Build docker test infrastructure.
sh hack/make/.go-autogen   # docker automated build files
# If `go get` shows an error - just ignore it.
go get ./...               # docker dependencies

cd integration-cli

# Run an individual test
go test -test.run "^TestPsListContainers"

# Run all tests - this will take forever... a specific test will be faster.
go test -v

Development from your Mac

Add a 'coal' entry to your '~/.ssh/config'. Not required, but we'll use this as a shortcut in examples below.

 Host coal
     User root
     Hostname 10.99.99.7
     ForwardAgent yes
     StrictHostKeyChecking no
     UserKnownHostsFile /dev/null
     ControlMaster no

Get a clone on your Mac:

 git clone git@github.com:joyent/sdc-docker.git
 cd sdc-docker

Make changes in your local clone:
```
 vi
```
Sync your changes to your 'docker0' zone in COAL (see Installation above):
```
 ./tools/rsync-to coal
```
This will rsync over changes (excepting binary bits like a change in sdcnode version, or added binary node modules) and restart the docker SMF service.

For testing I tend to have a shell open tailing the docker service's log file:

ssh coal
sdc-login docker
tail -f `svcs -L docker` | bunyan

arekinath/sdc-docker