Containers

Run The OpenZiti Tunneler with Docker

Contents

• Conventions
• Use cases:
  • Hosting OpenZiti services
  • Connecting to OpenZiti services with an intercepting proxy

Conventions

Configuring the OpenZiti Identity

It is necessary to supply an identity enrollment token or an enrolled identity configuration JSON to the container as a volume-mounted file or as environment variables. The following variable, volumes, and files are common to both container images described below.

Configuration with Environment Variable

• ZITI_IDENTITY_JSON: This is the identity represented as JSON. This variable overrides other methods of supplying the identity JSON. It is not advisable to mount a volume on the container filesystem when using this method because the identity is written to a temporary file and will cause an error if the file already exists.

Configuration with Files from Mounted Volume

You may bind a host directory to the container filesystem in /ziti-edge-tunnel to supply the token JWT file or configuration JSON file. If you provide a token JWT file, the entrypoint script will enroll the identity during container startup. The entrypoint script will write the identity configuration JSON file in the same directory with a filename like ${ZITI_IDENTITY_BASENAME}.json.

• ZITI_IDENTITY_BASENAME: the file basename (without the filename suffix) of the enrollment (.jwt) and identity (.json) files the tunneler will use
• ZITI_ENROLL_TOKEN: Optionally, you may supply the enrollment token JWT as a string if ${ZITI_IDENTITY_BASENAME}.jwt is not mounted
• ZITI_IDENTITY_WAIT: Optionally, you may configure the container to wait max seconds for the JWT or JSON file to appear in the mounted volume

Use Case: Hosting OpenZiti Services

This use case involves deploying the OpenZiti tunneler as a reverse proxy to publish regular network servers to your OpenZiti Network. You may locate the published servers in a Docker bridge network (use network mode bridge) or the Docker host's network (use network mode host). See the Linux tunneler doc for general info about the OpenZiti tunneler. Use the openziti/ziti-host container image for this case.

Container Image openziti/ziti-host

This image runs ziti-edge-tunnel run-host to invoke the hosting-only mode of the tunneler. The main difference from the parent image (openziti/ziti-edge-tunnel) is the command argument and run-as user. This container runs as "nobody" and doesn't require special privileges.

Image Tags for openziti/ziti-host

The openziti/ziti-host image is published in Docker Hub and automatically updated with new releases. You may subscribe to :latest (default) or pin a version for stability e.g. :0.19.11.

Dockerfile for openziti/ziti-host

The Dockerfile for openziti/ziti-host is ./Dockerfile.ziti-host.

Hosting an OpenZiti Service with openziti/ziti-host

Publish servers that are reachable on the Docker host's network, e.g., tcp:localhost:54321:

# identity file on Docker host is mounted in container: /opt/openziti/etc/identities/my-ziti-identity.json
docker run \
  --name ziti-host \
  --rm \
  --network=host \
  --env ZITI_IDENTITY_BASENAME="my-ziti-identity" \
  --volume /opt/openziti/etc/identities:/ziti-edge-tunnel \
  openziti/ziti-host

Publish servers inside the same Docker bridge network, e.g., tcp:my-docker-service:80:

# identity file on Docker host is stuffed in env var: /opt/openziti/etc/identities/my-ziti-identity.json
docker run \
  --name ziti-host \
  --rm \
  --network=my-docker-bridge \
  --env ZITI_IDENTITY_JSON="$(< /opt/openziti/etc/identities/my-ziti-identity.json)" \
  openziti/ziti-host

This example uses the included Docker Compose project to illustrate publishing a server container to your OpenZiti Network.

1. Create an OpenZiti Config with type intercept.v1.

   {
       "addresses": [
           "hello-docker.ziti"
       ],
       "protocols": [
           "tcp"
       ],
       "portRanges": [
           {
           "low": 80,
           "high": 80
           }
       ]
   }

2. Create an OpenZiti Config with type host.v1

   {
       "port": 80,
       "address": "hello",
       "protocol": "tcp"
   }

3. Create a service associating the two configs with a role attribute like "#HelloServices."

4. Create an identity for your client tunneler named "MyClient" and load the identity.

5. Create an identity named "DockerHost" and download the enrollment token in the same directory as docker-compose.yml, i.e., "DockerHost.jwt."

6. Create a Bind service policy assigning "#HelloServices" to be bound by "@DockerHost."

7. Create a Dial service policy granting access to "#HelloServices" to your client tunneler's identity "@MyClient."

8. Run the demo server

   docker-compose up --detach hello

9. Run the tunneler

   ZITI_IDENTITY_JSON="$(< /tmp/my-ziti-id.json)" docker-compose up --detach ziti-host
   # debug
   ZITI_IDENTITY_JSON="$(< /tmp/my-ziti-id.json)" docker-compose run ziti-host run-host --verbose=4

10. Access the demo server via your OpenZiti Network: http://hello-docker.ziti

Troubleshooting openziti/ziti-host

You may pass additional args by supplying the run-host mode and args when the container is run.

docker run \
  --name ziti-host \
  --rm \
  --network=my-docker-bridge \
  --env ZITI_IDENTITY_JSON="$(< /opt/openziti/etc/identities/my-ziti-identity.json)" \
  openziti/ziti-host \
    run-host --verbose=4

Docker Compose Examples for openziti/ziti-host

Get a single, enrolled identity configuration from an environment variable. You could define the variable with an .env file in the same directory as docker-compose.yml.

version: "3.9"
services:
    ziti-host:
        image: openziti/ziti-host
        environment:
            - ZITI_IDENTITY_JSON

Configure a single, enrolled identity from the host filesystem directory in the same directory as docker-compose.yml.

In this example, the file ziti_id.jwt exists and is used to enroll on the first run, producing ziti_id.json, the identity configuration file. Subsequent runs will use only the enrolled identity's JSON configuration file.

version: "3.9"
services:
    ziti-host:
        image: openziti/ziti-host
        volumes:
            - .:/ziti-edge-tunnel
        environment:
            - ZITI_IDENTITY_BASENAME=ziti_id

Configure all enrolled identities from a named volume.

This example loads all files named *.json from the mounted volume.

version: "3.9"
services:
    ziti-host:
        image: openziti/ziti-host
        volumes:
            - ziti-identities:/ziti-edge-tunnel
volumes:
    ziti-identities:

Enroll a single identity with a token from an environment variable and store in a named volume.

version: "3.9"
services:
    ziti-host:
        image: openziti/ziti-host
        volumes:
            - ziti-identity:/ziti-edge-tunnel
        environment:
            - ZITI_IDENTITY_BASENAME=ziti_id
            - ZITI_ENROLL_TOKEN=eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbSI6Im90dCIsImV4cCI6MTY3MDAwEFQ2NywiaXNzIjoiaHR0cHM6Ly83Y2U3ZTQyNC02YTkyLTRmZjItOTQ1OS1lYmJiYTMyMzQ2ZmEucHJvZHVjdGlvbi5uZXRmb3VuZHJ5LmlvOjQ0MyIsImp0aSI6ImQ0YjczZjFlLTRkOWEtNDk0ZC04NGQxLTQ2OWE1MGQyYzhmMCIsInN1YiI6ImdXdkQwaTd5RDkifQ.R5t2hoH0W1vJUn78_O8azoJ05FWLLSh6J3Q1XaDOidaYgDOWcLm7YiV99rymnjSjRC86IjNsAyZK678_D2dqyefR3VBI8LepamZ5jVSAcDFCF3Swk_jszcHDqcYs2YCucr6qrwsv8NTqEdUAJ8NVOiRaZbGhSuBvXTmWilCkCLcL7R4tXpIHakM_2WA4_tmwdbN8i7SGPPAB6pZOK_xDW10nBjg5Fe3Of_-53Gd-3swm9D3Yms1iIPBfMIQUWNzYaOCBa8UvGo8d9JjvJKgTlkMwZHL3hayzAuVEXoR1-LbA1t1Nhd8FgjvuL-YxN0XLaA3koL-FijL7ehWZoyUYPuO3xi63SQpbO-oDtX89jvGLMVercZBscXQsmCkDcj8OAnTb3Czb8HmsHgfydqvT6epUNFxFe_fSGz-CuGIuFBQwygfpBriGBnwVk8dnIJt7Wl75jPR8v-NImIIv1dKCI_ZajlsJ5l8D4OGnj76pBs3Wu7Hq1zxAbJ8HPJmi_ywTHAHVJVghifRTIR6_SyfeZGsHDY9s8YH5ErYvarBvMxwPCmjMMY3SKM_YOPG0u1c-KKByS3m7x7qia6P1ShWwGkbMmY722iFeVvoGN7SD51CkZiqWHClhBtdDv6_1K7y62KEmiX0D4YHXoikNqMCoPwa4yKyDRzoO8DKcAzaVRRg
volumes:
    ziti-identity:

Kubernetes Deployments for openziti/ziti-host

Refer to the workload tunneling guides for Kubernetes.

Use Case: Intercepting Proxy and Nameserver

This use case involves deploying the OpenZiti tunneler as an intercepting proxy with a built-in nameserver. Use the openziti/ziti-edge-tunnel container image for this case.

The "run" mode requires elevated privileges to configure the OS with a DNS resolver and IP routes.

Container Image openziti/ziti-edge-tunnel

This image runs ziti-edge-tunnel run, the intercepting proxy mode of the tunneler. The Red Hat 8 Universal Base Image (UBI) is the base image of this container.

See the Linux tunneler doc for general info about the OpenZiti tunneler.

Tags for openziti/ziti-edge-tunnel

The container image openziti/ziti-edge-tunnel is published in Docker Hub and automatically updated with new releases. You may subscribe to :latest (default) or pin a version for stability, e.g., :0.19.11.

Dockerfile for openziti/ziti-edge-tunnel

The Dockerfile for openziti/ziti-edge-tunnel is ./Dockerfile.base.

Accessing OpenZiti Services with openziti/ziti-edge-tunnel

Intercepting proxy run mode captures DNS names and layer-4 traffic that match authorized destinations.

# current directory contains enrollment token file ziti_id.jwt
docker run \
    --name ziti-tun \
    --network host \
    --privileged \
    --volume ${PWD}:/ziti-edge-tunnel/ \
    --volume "/var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket" \
    --device "/dev/net/tun:/dev/net/tun" \
    --env ZITI_IDENTITY_BASENAME=ziti_id \
    openziti/ziti-edge-tunnel

Troubleshooting openziti/ziti-edge-tunnel

You may pass additional args by supplying the run mode followed by args when the container is run.

docker run \
    --name ziti-edge-tunnel \
    --network host \
    --privileged \
    --volume ${PWD}:/ziti-edge-tunnel/ \
    --volume "/var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket" \
    --device "/dev/net/tun:/dev/net/tun" \
    --env ZITI_IDENTITY_BASENAME=ziti_id \
    openziti/ziti-edge-tunnel \
      run --verbose=4

Docker Compose Examples for openziti/ziti-edge-tunnel

This example uses the Docker Compose project included in this repo.

# enrolled identity file ziti_id.json is in the same directory as docker-compose.yml
ZITI_IDENTITY_BASENAME=ziti_id docker-compose run ziti-tun

This example uses a single, enrolled identity configuration file ziti_id.json in the same directory as docker-compose.yml.

version: "3.9"
services:
    ziti-tun:
        image: openziti/ziti-edge-tunnel
        devices:
            - /dev/net/tun:/dev/net/tun
        volumes:
            - .:/ziti-edge-tunnel
            - /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket
        environment:
            - ZITI_IDENTITY_BASENAME=ziti_id
        network_mode: host
        privileged: true

Kubernetes Deployments for openziti/ziti-edge-tunnel

Refer to the workload tunneling guides for Kubernetes.