Add README (#4)

README.md

@@ -0,0 +1,129 @@
+# docker-zerotier-moon
+<a href="https://github.com/wxx9248/docker-zerotier-moon/actions">
+    <img
+        src="https://img.shields.io/github/actions/workflow/status/wxx9248/docker-zerotier-moon/build.yaml?branch=master"
+        alt="GitHub Actions Status" />
+</a>
+<img src="https://img.shields.io/docker/v/zerotier/zerotier?sort=semver" alt="Image Version" />
+
+## Credits
+* [rwv/docker-zerotier-moon](https://github.com/rwv/docker-zerotier-moon)
+* [zerotier/zerotier](https://github.com/zerotier/ZeroTierOne)
+
+## What's different?
+* Changed based image to `zerotier-zerotier`.
+    * Alpine seemed to drop support for ZeroTier in the latest branch,
+    as for now, [v3.18](https://pkgs.alpinelinux.org/packages?name=zerotier-one&branch=v3.18),
+    so I decided to create a moon server image from the official ZeroTier image,
+    which is bigger (based on Debian) but is guaranteed to keep up with the latest ZeroTier release.
+* Re-wrote `entrypoint` file with Python
+    * There is a reference to the Bash implementation in rwv's repository.
+    * I just don't want to replace JSON fields with `sed` - it can get messy.
+* Moons can join networks now
+    * I kept the feature from the official image.
+    * With a few environment variables, you can specify the identity of the moon server,
+    as well as networks the moon server should be in.
+
+## Usage
+```
+Usage: docker run [DOCKER_OPTIONS] ghcr.io/wxx9248/zerotier-moon:master [OPTIONS]...
+Available options:
+    -h, --help
+        Display help text
+    -4, --ipv4 <IPV4_ADDRESS>
+        Specify a public IPv4 address
+    -6, --ipv6 <IPV6_ADDRESS>
+        Specify a public IPv6 address
+    -p, --port <PORT_NUMBER>
+        Specify a UDP port that ZeroTier will listen to
+
+Note: must specify at least one type of address.
+
+Optional environment variables:
+    ZEROTIER_API_SECRET
+        Specify an API secret
+        Will overwrite `authtoken.secret` file
+        Leave empty for automatic generation
+    ZEROTIER_IDENTITY_PUBLIC
+        Specify a public key for identification
+        Will overwrite `identity.public` file
+        Leave empty for automatic generation
+    ZEROTIER_IDENTITY_SECRET
+        Specify a private key for identification
+        Will overwrite `identity.public` file
+        Leave empty for automatic generation
+    ZEROTIER_JOIN_NETWORKS
+        Specify a list of network IDs, seperated by spaces,
+        that will be joined upon initialization
+```
+
+## Quick Start (from rwv's repo)
+### Start a container
+```
+docker run --name zerotier-moon -d --restart always -p 9993:9993/udp -v ~/somewhere:/var/lib/zerotier-one ghcr.io/wxx9248/zerotier-moon:master -4 1.2.3.4
+```
+Replace `1.2.3.4` with your moon's IPv4 address and replace `~/somewhere` with where you would like to store your configuration.
+
+### Show ZeroTier moon ID
+```
+docker logs zerotier-moon
+```
+
+## Docker Compose
+### Compose file
+`docker-compose.yml` example:
+``` YAML
+services:
+  zerotier-moon:
+    image: ghcr.io/wxx9248/zerotier-moon:master
+    container_name: "zerotier-moon"
+    restart: always
+    ports:
+      - "9993:9993/udp"
+    volumes:
+      - ./config:/var/lib/zerotier-one
+    command: ["-4", "1.2.3.4"]
+```
+Replace `1.2.3.4` with your moon's IPv4 address.
+
+### Show ZeroTier moon ID
+``` bash
+docker-compose logs
+```
+
+## Advanced usage
+### Manage ZeroTier
+```
+docker exec zerotier-moon zerotier-cli
+```
+
+### Mount ZeroTier conf folder
+```
+docker run --name zerotier-moon -d -p 9993:9993/udp -v ~/somewhere:/var/lib/zerotier-one ghcr.io/wxx9248/zerotier-moon:master -4 1.2.3.4
+```
+When creating a new container without mounting ZeroTier conf folder, a new moon ID will be generated.
+This command will mount `~/somewhere` to `/var/lib/zerotier-one` inside the container, allowing your ZeroTier moon to presist the same moon ID. If you don't do this, when you start a new container, a new moon ID will be generated.
+
+### IPv6 support
+```
+docker run --name zerotier-moon -d -p 9993:9993/udp ghcr.io/wxx9248/zerotier-moon:master -4 1.2.3.4 -6 2001:abcd:abcd::1
+```
+Replace `1.2.3.4`, `2001:abcd:abcd::1` with your moon's IP. You can remove `-4` option in pure IPv6 environment.
+
+### Custom port
+```
+docker run --name zerotier-moon -d -p 9994:9993/udp ghcr.io/wxx9248/zerotier-moon:master -4 1.2.3.4 -p 9994
+```
+Replace 9994 with your own custom port for ZeroTier moon.
+
+### Network privilege
+If you encounter issue: `ERROR: unable to configure virtual network port: could not open TUN/TAP device: No such file or directory`, please add `--cap-add=NET_ADMIN --cap-add=SYS_ADMIN --device=/dev/net/tun` args. Similar to this:
+
+```
+docker run --cap-add=NET_ADMIN --cap-add=SYS_ADMIN --device=/dev/net/tun --name zerotier-moon -d --restart always -p 9993:9993/udp ghcr.io/wxx9248/zerotier-moon:master -4 1.2.3.4
+```
+Solution provided by [Jonnyan404's Fork](https://github.com/Jonnyan404/docker-zerotier-moon).
+See Also [Issue #1](https://github.com/rwv/docker-zerotier-moon/issues/1).
+
+### Multi-arch support
+This image supports `linux/amd64`, `linux/386`, `linux/arm64`, `linux/arm/v5`, `linux/arm/v7`, `linux/ppc64le`, `linux/s390x` and `linux/mips64le`.

entrypoint.py

@@ -275,7 +275,7 @@ def start():
             line = process.stdout.readline()
             if line == "":
                 break
-            print_info(f"[Zerotier] {line.rstrip()}")
+            print_info(f"[ZeroTier] {line.rstrip()}")
     finally:
         process.terminate()
         print_info("Waiting daemon to quit...")