feat(ingester): optional gossip configuration

Exposes configuration parameters (on the ingester only) for
configuration of the gossip sub-system.

clap_blocks/src/gossip.rs

@@ -0,0 +1,39 @@
+//! CLI config for cluster gossip communication.
+
+use crate::socket_addr::SocketAddr;
+
+/// Configuration parameters for the cluster gossip communication mechanism.
+#[derive(Debug, Clone, clap::Parser)]
+#[allow(missing_copy_implementations)]
+pub struct GossipConfig {
+    /// A comma-delimited set of seed gossip peer addresses.
+    ///
+    /// Example: "10.0.0.1:4242,10.0.0.2:4242"
+    ///
+    /// These seeds will be used to discover all other peers that talk to the
+    /// same seeds. Typically all nodes in the cluster should use the same set
+    /// of seeds.
+    #[clap(
+        long = "gossip-seed-list",
+        env = "INFLUXDB_IOX_GOSSIP_SEED_LIST",
+        required = false,
+        num_args=1..,
+        value_delimiter = ',',
+        requires = "gossip_bind_address", // Field name, not flag
+    )]
+    pub seed_list: Vec<String>,
+
+    /// The UDP socket address IOx will use for gossip communication between
+    /// peers.
+    ///
+    /// Example: "0.0.0.0:4242"
+    ///
+    /// If not provided, the gossip sub-system is disabled.
+    #[clap(
+        long = "gossip-bind-address",
+        env = "INFLUXDB_IOX_GOSSIP_BIND_ADDR",
+        requires = "seed_list", // Field name, not flag
+        action
+    )]
+    pub gossip_bind_address: Option<SocketAddr>,
+}

clap_blocks/src/ingester.rs

@@ -2,10 +2,16 @@
 
 use std::path::PathBuf;
 
+use crate::gossip::GossipConfig;
+
 /// CLI config for the ingester using the RPC write path
 #[derive(Debug, Clone, clap::Parser)]
 #[allow(missing_copy_implementations)]
 pub struct IngesterConfig {
+    /// Gossip config.
+    #[clap(flatten)]
+    pub gossip_config: GossipConfig,
+
     /// Where this ingester instance should store its write-ahead log files. Each ingester instance
     /// must have its own directory.
     #[clap(long = "wal-directory", env = "INFLUXDB_IOX_WAL_DIRECTORY", action)]

clap_blocks/src/lib.rs

@@ -22,6 +22,7 @@ pub mod catalog_dsn;
 pub mod compactor;
 pub mod compactor_scheduler;
 pub mod garbage_collector;
+pub mod gossip;
 pub mod ingester;
 pub mod ingester_address;
 pub mod object_store;

influxdb_iox/src/commands/run/all_in_one.rs

@@ -7,6 +7,7 @@ use clap_blocks::{
     catalog_dsn::CatalogDsnConfig,
     compactor::CompactorConfig,
     compactor_scheduler::CompactorSchedulerConfig,
+    gossip::GossipConfig,
     ingester::IngesterConfig,
     ingester_address::IngesterAddress,
     object_store::{make_object_store, ObjectStoreConfig},
@@ -476,6 +477,10 @@ impl Config {
             persist_queue_depth,
             persist_hot_partition_cost,
             rpc_write_max_incoming_bytes: 1024 * 1024 * 1024, // 1GiB
+            gossip_config: GossipConfig {
+                seed_list: vec![],
+                gossip_bind_address: None,
+            },
         };
 
         let router_config = RouterConfig {