# Installation instructions ## Quick installation CGO_ENABLED=0 go build -ldflags='-s -w' mkdir groups echo '{"presenter": [{}]}' > groups/test.json ./galene & Then connect to `https://localhost:8443` and choose "test". ## Full installation instructions ### Build the `galene` binary You will need Go 1.16 or later (type `go version`). Then do: CGO_ENABLED=0 go build -ldflags='-s -w' On Windows, do set CGO_ENABLED=0 go build -ldflags="-s -w" ### Set up a group Set up a group called *test* by creating a file `groups/test.json`: mkdir groups vi groups/name.json You may use the following definition: { "op": [{"username": "admin", "password": "1234"}], "presenter": [{}] } See the README file for more details about defining groups. ### Test locally ./galene & You should be able to access Galène at `https://localhost:8443`. Connect to the group that you have just set up in two distinct browser windows, then press *Ready* in one of the two; you should see a video in the other. ### Configure your server's firewall If your server has a global IPv4 address and there is no firewall, there is nothing to do. If your server has a global IPv4 address, then the firewall must, at a strict minimum, allow incoming traffic to TCP port 8443 (or whatever is configured with the `-http` command-line option) and TCP port 1194 (or whatever is configured with the `-turn` option). For best performance, it should also allow UDP traffic to the TURN port, and UDP traffic to ephemeral (high-numbered) ports (or whatever is configured using the `-udp-range` option). If your server is behind NAT (which is not recommended), then the NAT must forward, at the very least, port 8443 to your server. Ideally, you should configure an external TURN server (see *ICE Servers* below) on a host that is not behind NAT. If that is not possible, then you must use a NAT that supports hairpinning, you must forward port 1194 in addition to port 8443, and you will need to add add the option `-turn 203.0.113.1:1194` to Galène's command line, where `203.0.113.1` is your NAT's external (global) IPv4 address. ### Cross-compile for your server This step is only required if your server runs a different OS or has a different CPU than your build machine. For a Linux server with an Intel or AMD CPU: CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags='-s -w' For a Raspberry Pi 1: CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=6 go build -ldflags='-s -w' For a BeagleBone or a Raspberry Pi 2 or later: CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build -ldflags='-s -w' For a 64-bit ARM board (Olimex Olinuxino-A64, Pine64, etc.) or server: CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags='-s -w' For a 32-bit MIPS board with no hardware floating point (WNDR3800, etc.): CGO_ENABLED=0 GOOS=linux GOARCH=mips GOMIPS=softfloat go build -ldflags='-s -w' ### Deploy to your server Set up a user *galene* on your server, then do: rsync -a galene static data groups galene@server.example.org: If you don't have a TLS certificate, Galène will generate a self-signed certificate automatically (and print a warning to the logs). If you have a certificate, install it in the files `data/cert.pem` and `data/key.pem`: ssh galene@server.example.org sudo cp /etc/letsencrypt/live/server.example.org/fullchain.pem data/cert.pem sudo cp /etc/letsencrypt/live/server.example.org/privkey.pem data/key.pem sudo chown galene:galene data/*.pem sudo chmod go-rw data/key.pem Now arrange to run the binary on the server. If you never reboot your server, it might be as simple as ssh galene@server.example.org ulimit -n 65536 nohup ./galene & If you are using *runit*, use a script like the following: #!/bin/sh exec 2>&1 cd ~galene ulimit -n 65536 exec setuidgid galene ./galene If you are using *systemd*: [Unit] Description=Galene After=network.target [Service] Type=simple WorkingDirectory=/home/galene User=galene Group=galene ExecStart=/home/galene/galene LimitNOFILE=65536 [Install] WantedBy=multi-user.target # Connectivity issues and ICE Servers Most connectivity issues are due to an incorrect ICE configuration. ICE is the NAT and firewall traversal protocol used by WebRTC. ICE can make use of two kinds of servers to help with NAT traversal: STUN servers, that help punching holes in well-behaved NATs, and TURN servers, that serve as relays for traffic. TURN is a superset of STUN: no STUN server is necessary if one or more TURN servers are available. Galène includes an IPv4-only TURN server, which is controlled by the `-turn` command-line option. It has the following behaviour: * if its value is set to the empty string `""`, then the built-in server is disabled; in this case, the file `data/ice-servers.json` configures an external TURN server; * if its value is a colon followed with a port number, for example `:1194`, then the TURN server will listen on all public IPv4 addresses of the local host, over UDP and TCP; this is the recommended value if the server is not behind NAT, and the firewall allows incoming connections to port 1194; * if the value of this option is a socket address, such as `203.0.113.1:1194`, then the TURN server will listen on all addresses of the local host but assume that the address seen by the clients is the one given in the option; this is useful when running behind NAT with port forwarding set up. * the default value is `auto`, which behaves like `:1194` if there is no `data/ice-servers.json` file, and like `""` otherwise. If the server is not accessible from the Internet, e.g. because of NAT or because it is behind a restrictive firewall, then you should configure a TURN server that runs on a host that is accessible by both Galène and the clients. Disable the built-in TURN server (`-turn ""` or the default `-turn auto`), and provide a working ICE configuration in the file `data/ice-servers.json`. In the case of a single STUN server, it should look like this: [ { "urls": [ "stun:stun.example.org" ] } ] In the case of s single TURN server, the `ice-servers.json` file should look like this: [ { "urls": [ "turn:turn.example.org:443", "turn:turn.example.org:443?transport=tcp" ], "username": "galene", "credential": "secret" } ] It is more secure to use coturn's `use-auth-secret` option. If you do that, then the `ice-servers.json` file should look like this: [ { "urls": [ "turn:turn.example.com:443", "turn:turn.example.com:443?transport=tcp" ], "username": "galene", "credential": "secret", "credentialType": "hmac-sha1" } ] For redundancy, you may set up multiple TURN servers, and ICE will use the first one that works. If an `ice-servers.json` file is present and Galène's built-in TURN server is enabled, then the external server will be used in preference to the built-in server.