node: Add a command 'graphman config provider'

chain/ethereum/src/network.rs

@@ -28,23 +28,30 @@ pub struct EthereumNetworkAdapters {
 }
 
 impl EthereumNetworkAdapters {
-    pub fn cheapest_with(
+    pub fn all_cheapest_with(
         &self,
         required_capabilities: &NodeCapabilities,
-    ) -> Result<Arc<EthereumAdapter>, Error> {
+    ) -> impl Iterator<Item = Arc<EthereumAdapter>> + '_ {
         let cheapest_sufficient_capability = self
             .adapters
             .iter()
             .find(|adapter| &adapter.capabilities >= required_capabilities)
             .map(|adapter| &adapter.capabilities);
 
-        // Select randomly from the cheapest adapters that have sufficent capabilities.
         self.adapters
             .iter()
-            .filter(|adapter| Some(&adapter.capabilities) == cheapest_sufficient_capability)
+            .filter(move |adapter| Some(&adapter.capabilities) == cheapest_sufficient_capability)
             .filter(|adapter| Arc::strong_count(&adapter.adapter) < adapter.limit)
-            .choose(&mut rand::thread_rng())
             .map(|adapter| adapter.adapter.cheap_clone())
+    }
+
+    pub fn cheapest_with(
+        &self,
+        required_capabilities: &NodeCapabilities,
+    ) -> Result<Arc<EthereumAdapter>, Error> {
+        // Select randomly from the cheapest adapters that have sufficent capabilities.
+        self.all_cheapest_with(required_capabilities)
+            .choose(&mut rand::thread_rng())
             .with_context(|| {
                 anyhow!(
                     "A matching Ethereum network with {:?} was not found.",

graph/src/lib.rs

@@ -39,6 +39,7 @@ pub use task_spawn::{
 
 pub use anyhow;
 pub use bytes;
+pub use itertools;
 pub use parking_lot;
 pub use petgraph;
 pub use prometheus;

node/src/bin/manager.rs

@@ -263,6 +263,16 @@ pub enum ConfigCommand {
         #[structopt(short, long)]
         shard: bool,
     },
+    /// Show eligible providers
+    ///
+    /// Prints the providers that can be used for a deployment on a given
+    /// network with the given features. Set the name of the node for which
+    /// to simulate placement with the toplevel `--node-id` option
+    Provider {
+        #[structopt(short, long, default_value = "")]
+        features: String,
+        network: String,
+    },
 }
 
 #[derive(Clone, Debug, StructOpt)]
@@ -481,6 +491,7 @@ impl From<Opt> for config::Opt {
         let mut config_opt = config::Opt::default();
         config_opt.config = Some(opt.config);
         config_opt.store_connection_pool_size = 5;
+        config_opt.node_id = opt.node_id;
         config_opt
     }
 }
@@ -807,6 +818,12 @@ async fn main() -> anyhow::Result<()> {
                 }
                 Check { print } => commands::config::check(&ctx.config, print),
                 Pools { nodes, shard } => commands::config::pools(&ctx.config, nodes, shard),
+                Provider { features, network } => {
+                    let logger = ctx.logger.clone();
+                    let registry = ctx.registry.clone();
+                    commands::config::provider(logger, &ctx.config, registry, features, network)
+                        .await
+                }
             }
         }
         Remove { name } => commands::remove::run(ctx.subgraph_store(), name),

node/src/manager/commands/config.rs

@@ -1,9 +1,16 @@
-use std::collections::BTreeMap;
+use std::{collections::BTreeMap, sync::Arc};
 
-use graph::prelude::{
-    anyhow::{anyhow, Error},
-    NodeId,
+use graph::{
+    anyhow::bail,
+    components::metrics::MetricsRegistry,
+    itertools::Itertools,
+    prelude::{
+        anyhow::{anyhow, Error},
+        NodeId,
+    },
+    slog::Logger,
 };
+use graph_chain_ethereum::{EthereumAdapterTrait, NodeCapabilities};
 use graph_store_postgres::DeploymentPlacer;
 
 use crate::config::Config;
@@ -89,3 +96,47 @@ pub fn pools(config: &Config, nodes: Vec<String>, shard: bool) -> Result<(), Err
     }
     Ok(())
 }
+
+pub async fn provider(
+    logger: Logger,
+    config: &Config,
+    registry: Arc<dyn MetricsRegistry>,
+    features: String,
+    network: String,
+) -> Result<(), Error> {
+    // Like NodeCapabilities::from_str but with error checking for typos etc.
+    fn caps_from_features(features: String) -> Result<NodeCapabilities, Error> {
+        let mut caps = NodeCapabilities {
+            archive: false,
+            traces: false,
+        };
+        for feature in features.split(',') {
+            match feature {
+                "archive" => caps.archive = true,
+                "traces" => caps.traces = true,
+                _ => bail!("unknown feature {}", feature),
+            }
+        }
+        Ok(caps)
+    }
+
+    let caps = caps_from_features(features)?;
+    let networks =
+        crate::manager::commands::run::create_ethereum_networks(logger, registry, config, &network)
+            .await?;
+    let adapters = networks
+        .networks
+        .get(&network)
+        .ok_or_else(|| anyhow!("unknown network {}", network))?;
+    let adapters = adapters.all_cheapest_with(&caps);
+    println!(
+        "deploy on network {} with features [{}] on node {}\neligible providers: {}",
+        network,
+        caps,
+        config.node.as_str(),
+        adapters
+            .map(|adapter| adapter.provider().to_string())
+            .join(", ")
+    );
+    Ok(())
+}

node/src/manager/commands/run.rs

@@ -346,7 +346,7 @@ fn create_ipfs_clients(logger: &Logger, ipfs_addresses: &Vec<String>) -> Vec<Ipf
 }
 
 /// Parses an Ethereum connection string and returns the network name and Ethereum adapter.
-async fn create_ethereum_networks(
+pub async fn create_ethereum_networks(
     logger: Logger,
     registry: Arc<dyn MetricsRegistryTrait>,
     config: &Config,