remove docker networks and leave swarm on setup

some docker networks and the swarm can create routing rules that
conflict with the ones we create leading to errors such as:

59:2025-10-15T15:07:33.745853Z  WARN Failed to connect to 10.0.1.243:4000: No route to host (os error 113)
89:2025-10-15T15:08:30.197646Z  WARN Failed to connect to 10.0.1.32:4000: No route to host (os error 113)
92:2025-10-15T15:08:30.837360Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
95:2025-10-15T15:08:33.905356Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
98:2025-10-15T15:08:36.981419Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
101:2025-10-15T15:08:40.049335Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
104:2025-10-15T15:08:43.121680Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
107:2025-10-15T15:08:46.197394Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
110:2025-10-15T15:08:49.265514Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
113:2025-10-15T15:08:52.337454Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
116:2025-10-15T15:08:55.409444Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
119:2025-10-15T15:08:58.481471Z  WARN Failed to connect to 10.0.1.91:4000: No route to host (os error 113)
1

1 files changed, 4 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index 830fba0..da113c1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -953,6 +953,10 @@ fn machine_configuration_script(config: &MachineConfig) -> String {
     // tcp max orphan limit
     script.push_str("echo 524288 > /proc/sys/net/ipv4/tcp_max_orphans\n");
 
+    // exit docker swarm and remove all networks
+    script.push_str("docker swarm leave || true\n");
+    script.push_str("docker network ls -q | xargs docker network rm -f || true\n");
+
     // ip configuration
     script.push_str("cat << EOF | ip -b -\n");
     for command in config.ip_commands.iter() {