chore: correct example config file (#5105)

* chore: correct example config file

* fix: fix unit test

config/config.md

@@ -286,7 +286,7 @@
 | `data_home` | String | `/tmp/metasrv/` | The working home directory. |
 | `bind_addr` | String | `127.0.0.1:3002` | The bind address of metasrv. |
 | `server_addr` | String | `127.0.0.1:3002` | The communication server address for frontend and datanode to connect to metasrv,  "127.0.0.1:3002" by default for localhost. |
-| `store_addr` | String | `127.0.0.1:2379` | Store server address default to etcd store. |
+| `store_addrs` | Array | -- | Store server address default to etcd store. |
 | `selector` | String | `round_robin` | Datanode selector type.<br/>- `round_robin` (default value)<br/>- `lease_based`<br/>- `load_based`<br/>For details, please see "https://docs.greptime.com/developer-guide/metasrv/selector". |
 | `use_memory_store` | Bool | `false` | Store data in memory. |
 | `enable_telemetry` | Bool | `true` | Whether to enable greptimedb telemetry. |

config/metasrv.example.toml

@@ -8,7 +8,7 @@ bind_addr = "127.0.0.1:3002"
 server_addr = "127.0.0.1:3002"
 
 ## Store server address default to etcd store.
-store_addr = "127.0.0.1:2379"
+store_addrs = ["127.0.0.1:2379"]
 
 ## Datanode selector type.
 ## - `round_robin` (default value)

src/meta-srv/src/metasrv.rs

@@ -179,7 +179,7 @@ impl Default for MetasrvOptions {
 
 impl Configurable for MetasrvOptions {
     fn env_list_keys() -> Option<&'static [&'static str]> {
-        Some(&["wal.broker_endpoints"])
+        Some(&["wal.broker_endpoints", "store_addrs"])
     }
 }