feat: auto detecting local IP to use as hostname (#5314)

* feat: auto detecting hostname

* chore: update config.md

* chore: bring back hostname

* chore: apply suggestions from CR

* chore: use const

* chore: apply suggesions from CR

* fix: fix sqlness

tests-integration/src/cluster.rs

@@ -185,6 +185,7 @@ impl GreptimeDbClusterBuilder {
                 max_metadata_value_size: None,
             },
             wal: self.metasrv_wal_config.clone(),
+            server_addr: "127.0.0.1:3002".to_string(),
             ..Default::default()
         };
 

tests-integration/src/standalone.rs

@@ -45,6 +45,7 @@ use frontend::instance::builder::FrontendBuilder;
 use frontend::instance::{FrontendInstance, Instance, StandaloneDatanodeManager};
 use meta_srv::metasrv::{FLOW_ID_SEQ, TABLE_ID_SEQ};
 use query::stats::StatementStatistics;
+use servers::grpc::GrpcOptions;
 use servers::Mode;
 use snafu::ResultExt;
 
@@ -291,6 +292,7 @@ impl GreptimeDbStandaloneBuilder {
             procedure: procedure_config,
             metadata_store: kv_backend_config,
             wal: self.metasrv_wal_config.clone().into(),
+            grpc: GrpcOptions::default().with_hostname("127.0.0.1:4001"),
             ..StandaloneOptions::default()
         };
 

tests-integration/src/test_util.rs

@@ -349,7 +349,9 @@ pub(crate) fn create_datanode_opts(
             providers,
             store: default_store,
         },
-        grpc: GrpcOptions::default().with_addr(PEER_PLACEHOLDER_ADDR),
+        grpc: GrpcOptions::default()
+            .with_addr(PEER_PLACEHOLDER_ADDR)
+            .with_hostname(PEER_PLACEHOLDER_ADDR),
         mode,
         wal: wal_config,
         ..Default::default()

tests-integration/tests/http.rs

@@ -850,7 +850,7 @@ is_strict_mode = false
 
 [grpc]
 addr = "127.0.0.1:4001"
-hostname = "127.0.0.1"
+hostname = "127.0.0.1:4001"
 max_recv_message_size = "512MiB"
 max_send_message_size = "512MiB"
 runtime_size = 8