teleport/docker

Docker

This directory contains Docker-based flow to run Teleport clusters locally for testing & development purposes.

Building

First, you need to build teleport:latest Docker image. This image is built automatically when you type make BUT...

But you have to build the base image first, by running make -C build.assets from $GOPATH/github.com/gravitational/teleport (repository base dir).

Starting

Type:

$ make

This will start two Teleport clusters:

• Single-node cluster one, accessible now on https://localhost:3080
• Three-node cluster two, accessible now on https://localhost:5080

Stopping

Type:

$ make stop

Configuration

Look at the Makefile: the containers are started with their /var/lib/teleport mounted to data/one or data/two on a host.

The configuration is passed via YAML files located in /teleport/docker/xxx.yaml inside each container.

Since the cluster data is preserved between restarts, so you can edit the configuration and restart if you want to change configuration changes.

Using TCTL

To add users to any of the clusters, you have to "enter" into the running containers of their auth servers and use tctl there.

For cluster "one":

$ make enter-one

and then you'll find yourself inside a container where teleport auth daemon is running, try ps -ef for example and you'll get something like this:

container(one) /teleport: ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
root         1     0 40 06:04 ?        00:00:06 build/teleport start -c /teleport/docker/one.yaml
root        13     0  0 06:04 ?        00:00:00 /bin/bash
root        19    13  0 06:04 ?        00:00:00 ps -ef

For cluster "two":

$ make enter-two

... and then you can use stuff like tctl users add, etc. Make sure to pass the YAML file to tctl via -c flag.

Trusted Clusters

Trusted Clusters with Resources

1. Update two-role.yaml and replace username_goes_here with your username.

2. Create a Role and TrustedCluster resource on Cluster Two.

   make enter-two
   tctl -c /root/go/src/github.com/gravitational/teleport/docker/two-auth.yaml create -f docker/two-role-admin.yaml
   tctl -c /root/go/src/github.com/gravitational/teleport/docker/two-auth.yaml create -f docker/two-tc.yaml
   

Trusted Clusters with File Configuration

Export CAs

Run the following commands to export your CAs.

# enter cluster two and export ca
make enter-two
tctl -c /root/go/src/github.com/gravitational/teleport/docker/two-auth.yaml auth export > docker/data/two/two.ca
exit

# enter cluster one and export ca
make enter-one
tctl auth export > docker/data/one/one.ca
exit

Upate Configuration

Stop both clusters with make stop, update the file configuration for both clusters, and start again with make.

# update docker/one.yaml with the following under "auth_service"
trusted_clusters:
  - key_file: /root/go/src/github.com/gravitational/teleport/docker/data/two/two.ca

# update docker/two-auth.yaml with the following under "auth_service"
trusted_clusters:
  - key_file: /root/go/src/github.com/gravitational/teleport/docker/data/one/one.ca
    allow_logins: root
    tunnel_addr: one

Ansible

To setup Ansible:

1. Follow steps in Trusted Cluster section to setup Trusted Clusters.

2. Use tctl to issue create user command and follow link on screen to create user.

   tctl users add {username} root
   

3. Configure Ansible.

   # add two-node to ansible hosts file
   echo "172.10.1.2:3022" >> /etc/ansible/hosts
   
   # setup ssh_args that ansible will use to access trusted cluster nodes
   sed -i '/ssh_args = -o ControlMaster=auto -o ControlPersist=60s/assh_args = -o "ProxyCommand ssh -p 3023 one -s proxy:%h:%p@two"' /etc/ansible/ansible.cfg
   
   # use scp over sftp
   sed -i '/scp_if_ssh/s/^#//g' /etc/ansible/ansible.cfg
   

4. Start and load OpenSSH agent with keys.

   # create directory for ssh config
   mkdir ~/.ssh && chmod 700 ~/.ssh
   
   # start ssh-agent
   eval `ssh-agent`
   
   # log in with the user created before
   tsh --proxy=localhost --user=rjones login
   
   # load keys into ssh-agent
   tsh --proxy=localhost --user=rjones agent --load
   

5. Verify Ansible works:

   $ ansible all -m ping
   172.10.1.2 | success >> {
       "changed": false, 
       "ping": "pong"
   }
   

6. Run an simple playbook:

   # cd to directory that contains playbook
   cd /root/go/src/github.com/gravitational/teleport/docker/ansible
   
   # run playbook
   ansible-playbook playbook.yaml
   

Interactive Usage

Also you can start an empty container from which you can manually invoke teleport start. This is similar to launching an empty Linux VM with a Teleport binary.

To get shell inside the same "one" (single-node cluster) container without Teleport running:

$ make shell

NOTE: If you get "network already exists" error, do make stop first.

Once inside, you'll get the same /var/lib/teleport as "one", so you can start (and even build) teleport daemon manually. This container also comes with a fully configured screen so you can treat it as a real VM.