Allow configuring the tsnet state directory. Automatically configure …

…it to be /data in the Dockerfile

Dockerfile

@@ -9,4 +9,10 @@ ADD https://github.com/giodamelio/tailscale-custom-domain-dns/releases/download/
 
 RUN tar xzvf ${RELEASE_FILE} && rm ${RELEASE_FILE}
 
+# Create empty config file so the cli doesn't complain
+RUN mkdir /root/.config/ && touch /root/.config/tailscale-custom-domain-dns.toml
+
+# Save the state directory in /data so it can be added to a volume easily
+ENV TSDNS_TAILSCALE_STATEDIRECTORY=/data
+
 ENTRYPOINT [ "/srv/tailscale-custom-domain-dns" ]

examples/tailscale-custom-domain-dns.toml

@@ -38,6 +38,11 @@ oauth-client-secret = ""
 # The hostname that the server will connect to your tailnet with.
 hostname = "tailscale-custom-domain-dns"
 
+# The directory that the Tailscale state is stored in
+# If it is not set, tsnet will choose a path in the users config directory
+# Example: state-dir = "/data"
+state-dir = ""
+
 [dns-server]
 # The port that the DNS server will run on.
 # The port is opened directly on your tailnet using the tsnet library, so you 

server/server.go

@@ -26,6 +26,9 @@ func Start() {
 	tsServer := new(tsnet.Server)
 	tsServer.Hostname = viper.GetString("tailscale.hostname")
 	tsServer.AuthKey = viper.GetString("tailscale.auth-key")
+	if viper.IsSet("tailscale.state-directory") {
+		tsServer.Dir = viper.GetString("tailscale.state-directory")
+	}
 	tsServer.Logf = func(format string, args ...any) {
 		log.
 			Trace().