feat: use loopback ip address instead of alias to improve compatibility

configuration/contrib/collectd/collectd.conf

@@ -276,7 +276,7 @@ LoadPlugin unixsock
 
 <Plugin mqtt>
 	<Publish "name">
-		Host "localhost"
+		Host "127.0.0.1"
 		Port 1883
 		ClientId "tedge-collectd"
 #		User "user"

crates/common/axum_tls/test_data/_regenerate_certs.sh

@@ -6,7 +6,7 @@
 days=365000
 args=("-days" "$days" "-noenc" \
         -subj "/CN=localhost" \
-        -addext "subjectAltName=DNS:localhost,DNS:*.localhost" \
+        -addext "subjectAltName=DNS:localhost,DNS:*.localhost,IP:127.0.0.1" \
         -addext "basicConstraints=critical,CA:false")
 
 set -eux

crates/common/mqtt_channel/src/config.rs

@@ -63,7 +63,7 @@ pub struct Config {
 pub struct BrokerConfig {
     /// MQTT host to connect to
     ///
-    /// Default: "localhost"
+    /// Default: "127.0.0.1"
     pub host: String,
 
     /// MQTT port to connect to. Usually it's either 1883 for insecure MQTT and
@@ -156,7 +156,7 @@ impl Default for Config {
     fn default() -> Self {
         Config {
             broker: BrokerConfig {
-                host: String::from("localhost"),
+                host: String::from("127.0.0.1"),
                 port: 1883,
                 authentication: None,
             },

crates/common/tedge_config/src/tedge_config_cli/tedge_config.rs

@@ -584,7 +584,7 @@ define_tedge_config! {
 
         client: {
             /// The host that the thin-edge MQTT client should connect to
-            #[tedge_config(example = "localhost", default(value = "localhost"))]
+            #[tedge_config(example = "127.0.0.1", default(value = "127.0.0.1"))]
             host: String,
 
             /// The port that the thin-edge MQTT client should connect to

crates/common/tedge_config_macros/examples/macro.rs

@@ -96,7 +96,7 @@ define_tedge_config! {
 
         client: {
             /// The host that the thin-edge MQTT client should connect to
-            #[tedge_config(example = "localhost", default(value = "localhost"))]
+            #[tedge_config(example = "127.0.0.1", default(value = "127.0.0.1"))]
             host: String,
 
             /// The port that the thin-edge MQTT client should connect to

crates/core/tedge/src/bridge/common_mosquitto_config.rs

@@ -89,7 +89,7 @@ impl Default for CommonMosquittoConfig {
             config_file: COMMON_MOSQUITTO_CONFIG_FILENAME.into(),
             internal_listener: ListenerConfig {
                 port: Some(1883),
-                bind_address: Some("localhost".into()),
+                bind_address: Some("127.0.0.1".into()),
                 allow_anonymous: true,
                 require_certificate: false,
                 ..Default::default()
@@ -237,7 +237,7 @@ mod tests {
             .collect();
         let mut expected = std::collections::HashSet::new();
 
-        expected.insert("listener 1883 localhost");
+        expected.insert("listener 1883 127.0.0.1");
         expected.insert("allow_anonymous true");
         expected.insert("connection_messages true");
 

crates/extensions/c8y_mapper_ext/src/converter.rs

@@ -3556,7 +3556,7 @@ pub(crate) mod tests {
         let device_type = "test-device-type".into();
         let tedge_config = TEdgeConfig::load_toml_str("service.ty = \"service\"");
         let c8y_host = "test.c8y.io".into();
-        let tedge_http_host = "localhost".into();
+        let tedge_http_host = "127.0.0.1".into();
         let auth_proxy_addr = "127.0.0.1".into();
         let auth_proxy_port = 8001;
         let auth_proxy_protocol = Protocol::Http;

crates/extensions/tedge_mqtt_bridge/src/config.rs

@@ -225,7 +225,7 @@ mod tests {
 
         #[test]
         fn sets_certs_in_the_provided_mqtt_config() {
-            let mut opts = MqttOptions::new("dummy-device", "localhost", 1883);
+            let mut opts = MqttOptions::new("dummy-device", "127.0.0.1", 1883);
             let device_cert = rcgen::generate_simple_self_signed(["dummy-device".into()]).unwrap();
             let c8y_cert = rcgen::generate_simple_self_signed(["dummy-c8y".into()]).unwrap();
 

crates/extensions/tedge_mqtt_bridge/tests/bridge.rs

@@ -37,13 +37,13 @@ fn new_broker_and_client(name: &str, port: u16) -> (AsyncClient, EventLoop) {
         .spawn(move || broker.start().unwrap())
         .unwrap();
     AsyncClient::new(
-        MqttOptions::new(format!("{name}-test-client"), "localhost", port),
+        MqttOptions::new(format!("{name}-test-client"), "127.0.0.1", port),
         10,
     )
 }
 
 async fn start_mqtt_bridge(local_port: u16, cloud_port: u16, rules: BridgeConfig) {
-    let cloud_config = MqttOptions::new("a-device-id", "localhost", cloud_port);
+    let cloud_config = MqttOptions::new("a-device-id", "127.0.0.1", cloud_port);
     let service_name = "tedge-mapper-test";
     let health_topic = format!("te/device/main/service/{service_name}/status/health")
         .as_str()

crates/tests/mqtt_tests/src/test_mqtt_client.rs

@@ -162,7 +162,7 @@ impl TestCon {
         let id: String = std::iter::repeat_with(fastrand::alphanumeric)
             .take(10)
             .collect();
-        let mut options = MqttOptions::new(id, "localhost", mqtt_port);
+        let mut options = MqttOptions::new(id, "127.0.0.1", mqtt_port);
         options.set_clean_session(true);
 
         let (client, eventloop) = AsyncClient::new(options, 10);

crates/tests/mqtt_tests/src/test_mqtt_server.rs

@@ -132,7 +132,7 @@ fn spawn_broker() -> u16 {
     };
 
     std::thread::spawn(move || {
-        let mut mqttoptions = rumqttc::MqttOptions::new("rumqtt-sync", "localhost", port);
+        let mut mqttoptions = rumqttc::MqttOptions::new("rumqtt-sync", "127.0.0.1", port);
         mqttoptions.set_keep_alive(Duration::from_secs(5));
 
         let (mut client, mut connection) = rumqttc::Client::new(mqttoptions, 10);

tests/RobotFramework/tests/cumulocity/configuration/generate_certificates.sh

@@ -30,7 +30,7 @@ authorityKeyIdentifier=keyid
 basicConstraints=CA:FALSE
 keyUsage = digitalSignature, keyAgreement
 extendedKeyUsage = serverAuth, clientAuth
-subjectAltName=DNS:localhost,IP:$C8Y_PROXY_COMMON_NAME
+subjectAltName=DNS:localhost,IP:$C8Y_PROXY_COMMON_NAME,IP:127.0.0.1
 EOF
 
 openssl x509 -req \
@@ -49,7 +49,7 @@ authorityKeyIdentifier=keyid
 basicConstraints=CA:FALSE
 keyUsage = digitalSignature, keyAgreement
 extendedKeyUsage = serverAuth, clientAuth
-subjectAltName=DNS:localhost,IP:$FTS_COMMON_NAME
+subjectAltName=DNS:localhost,IP:$FTS_COMMON_NAME,IP:127.0.0.1
 EOF
 
 openssl genrsa -out main-agent.key 2048

tests/RobotFramework/tests/mqtt/gen_certs.sh

@@ -21,7 +21,7 @@ cat > v3.ext << EOF
 authorityKeyIdentifier=keyid
 basicConstraints=CA:FALSE
 keyUsage = digitalSignature, keyAgreement
-subjectAltName=DNS:$(hostname),DNS:localhost
+subjectAltName=DNS:$(hostname),DNS:localhost,IP:127.0.0.1
 EOF
 
 openssl x509 -req \

tests/RobotFramework/tests/tedge/call_tedge_config_list.robot

@@ -299,7 +299,7 @@ set/unset mqtt.client.host
     # Undo the change by using the 'unset' command, value returns to default one
     Execute Command    sudo tedge config unset mqtt.client.host
     ${unset}    Execute Command    tedge config list
-    Should Contain    ${unset}    mqtt.client.host=localhost
+    Should Contain    ${unset}    mqtt.client.host=127.0.0.1
 
 set/unset mqtt.client.port
     Execute Command    sudo tedge config set mqtt.client.port 1888

tests/images/debian-systemd/files/bootstrap.sh

@@ -695,7 +695,7 @@ gen_certs() {
     authorityKeyIdentifier=keyid
     basicConstraints=CA:FALSE
     keyUsage = digitalSignature, keyAgreement
-    subjectAltName=DNS:$(hostname), DNS:localhost
+    subjectAltName=DNS:$(hostname), DNS:localhost, IP:127.0.0.1
 EOF
 
     openssl x509 -req \
@@ -774,7 +774,7 @@ authorityKeyIdentifier=keyid
 basicConstraints=CA:FALSE
 keyUsage = digitalSignature, keyAgreement
 extendedKeyUsage = serverAuth, clientAuth
-subjectAltName=DNS:${CN},DNS:localhost
+subjectAltName=DNS:${CN},DNS:localhost,IP:127.0.0.1
 EOF
     )