Ignore delinquent stake on exit (backport #20367) (#20612)

* Ignore delinquent stake on exit (#20367)

* add --ignore-delinquency flag to validator exit and wait-for-restart-window sub commands

* Fix a merge issue

* Add missing variable declaration

* Remove empty line to help CI checks pass

* run rustfmt

* Change argument wording for clarity and verbosity

* Change --ignore-delinquent-stake to --max-delinquent-stake

* cargo fmtgit add validator/src/main.rsgit add validator/src/main.rs

* Adjust per mvines

* Formatting

* Improve input validation

* Please automate cargo fmt somehow

(cherry picked from commit fc5dd7f3bc)

# Conflicts:
#	validator/src/main.rs

* Fixes cherry-pick conflict

Co-authored-by: Michael <68944931+michaelh-laine@users.noreply.github.com>
Co-authored-by: Steven Czabaniuk <steven@solana.com>

validator/src/main.rs

@@ -11,7 +11,7 @@ use {
         input_parsers::{keypair_of, keypairs_of, pubkey_of, value_of},
         input_validators::{
             is_keypair, is_keypair_or_ask_keyword, is_parsable, is_pubkey, is_pubkey_or_keypair,
-            is_slot,
+            is_slot, is_valid_percentage,
         },
         keypair::SKIP_SEED_PHRASE_VALIDATION_ARG,
     },
@@ -114,9 +114,9 @@ fn wait_for_restart_window(
     ledger_path: &Path,
     identity: Option<Pubkey>,
     min_idle_time_in_minutes: usize,
+    max_delinquency_percentage: u8,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let sleep_interval = Duration::from_secs(5);
-    let min_delinquency_percentage = 0.05;
 
     let min_idle_slots = (min_idle_time_in_minutes as f64 * 60. / DEFAULT_S_PER_SLOT) as Slot;
 
@@ -142,6 +142,11 @@ fn wait_for_restart_window(
         ),
     );
 
+    println!(
+        "Maximum permitted delinquency: {}%",
+        max_delinquency_percentage
+    );
+
     let mut current_epoch = None;
     let mut leader_schedule = VecDeque::new();
     let mut restart_snapshot = None;
@@ -287,7 +292,9 @@ fn wait_for_restart_window(
 
                         if restart_snapshot == snapshot_slot && !monitoring_another_validator {
                             "Waiting for a new snapshot".to_string()
-                        } else if delinquent_stake_percentage >= min_delinquency_percentage {
+                        } else if delinquent_stake_percentage
+                            >= (max_delinquency_percentage as f64 / 100.)
+                        {
                             style("Delinquency too high").red().to_string()
                         } else {
                             break; // Restart!
@@ -1958,6 +1965,15 @@ pub fn main() {
                     .default_value("10")
                     .help("Minimum time that the validator should not be leader before restarting")
             )
+            .arg(
+                Arg::with_name("max_delinquent_stake")
+                    .long("max-delinquent-stake")
+                    .takes_value(true)
+                    .validator(is_valid_percentage)
+                    .default_value("5")
+                    .value_name("PERCENT")
+                    .help("The maximum delinquent stake % permitted for an exit")
+            )
         )
         .subcommand(
             SubCommand::with_name("authorized-voter")
@@ -2028,6 +2044,15 @@ pub fn main() {
                     .validator(is_pubkey_or_keypair)
                     .help("Validator identity to monitor [default: your validator]")
             )
+            .arg(
+                Arg::with_name("max_delinquent_stake")
+                    .long("max-delinquent-stake")
+                    .takes_value(true)
+                    .validator(is_valid_percentage)
+                    .default_value("5")
+                    .value_name("PERCENT")
+                    .help("The maximum delinquent stake % permitted for a restart")
+            )
             .after_help("Note: If this command exits with a non-zero status \
                          then this not a good time for a restart")
         )
@@ -2094,9 +2119,12 @@ pub fn main() {
             let min_idle_time = value_t_or_exit!(subcommand_matches, "min_idle_time", usize);
             let force = subcommand_matches.is_present("force");
             let monitor = subcommand_matches.is_present("monitor");
+            let max_delinquent_stake =
+                value_t_or_exit!(subcommand_matches, "max_delinquent_stake", u8);
 
             if !force {
-                wait_for_restart_window(&ledger_path, None, min_idle_time).unwrap_or_else(|err| {
+                wait_for_restart_window(&ledger_path, None, min_idle_time, max_delinquent_stake)
+                    .unwrap_or_else(|err| {
                         println!("{}", err);
                         exit(1);
                     });
@@ -2134,7 +2162,11 @@ pub fn main() {
         ("wait-for-restart-window", Some(subcommand_matches)) => {
             let min_idle_time = value_t_or_exit!(subcommand_matches, "min_idle_time", usize);
             let identity = pubkey_of(subcommand_matches, "identity");
-            wait_for_restart_window(&ledger_path, identity, min_idle_time).unwrap_or_else(|err| {
+            let max_delinquent_stake =
+                value_t_or_exit!(subcommand_matches, "max_delinquent_stake", u8);
+
+            wait_for_restart_window(&ledger_path, identity, min_idle_time, max_delinquent_stake)
+                .unwrap_or_else(|err| {
                     println!("{}", err);
                     exit(1);
                 });