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light client : failsafe crate (circuit breaker) (#9790)

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* refactor(light) : N/W calls with `circuit breaker`

* fix(nits) : forgot to commit new files

* Add tests and change CLI args

* Address grumbles

* fix(failsafe-rs) : Santize input to prevent panics

* chore(failsafe) : bump failsafe, (parking_lot)

Bump failsafe to v0.3.0 to enable `parking_lot::Mutex` instead
`spin::Mutex`

* Remove `success_rate`

* feat(circuit_breaker logger)

* feat(CLI): separate CLI args request and response

* Fix tests

* Error response provide request kind

When a reponse `times-out` provide the actual request or requests that failed

* Update ethcore/light/src/on_demand/mod.rs

Co-Authored-By: niklasad1 <niklasadolfsson1@gmail.com>

* Update ethcore/light/src/on_demand/mod.rs

Co-Authored-By: niklasad1 <niklasadolfsson1@gmail.com>

* fix(grumbles): formatting nit

* fix(grumbles)

* Use second resolution on CLI args
* Use `consecutive failure policy` instead of `timeOverWindow`
* Add a couple of tests for `request_guard`

* fix(request_guard): off-by-one error, update tests
This commit is contained in:
Niklas Adolfsson
2018-12-05 10:36:53 +01:00
committed by Afri Schoedon
parent ec886ddefb
commit 7fb33796b1
13 changed files with 652 additions and 158 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
parity/cli/mod.rs
View File

@@ -579,13 +579,25 @@ usage! {
"Specify CORS header for IPFS API responses. Special options: \"all\", \"none\".",
["Light Client Options"]
ARG arg_on_demand_retry_count: (Option<usize>) = None, or |c: &Config| c.light.as_ref()?.on_demand_retry_count,
"--on-demand-retry-count=[RETRIES]",
"Specify the query retry count.",
ARG arg_on_demand_response_time_window: (Option<u64>) = None, or |c: &Config| c.light.as_ref()?.on_demand_response_time_window,
"--on-demand-time-window=[S]",
"Specify the maximum time to wait for a successful response",
ARG arg_on_demand_inactive_time_limit: (Option<u64>) = None, or |c: &Config| c.light.as_ref()?.on_demand_inactive_time_limit,
"--on-demand-inactive-time-limit=[MS]",
"Specify light client query inactive time limit. O for no limit.",
ARG arg_on_demand_request_backoff_start: (Option<u64>) = None, or |c: &Config| c.light.as_ref()?.on_demand_request_backoff_start,
"--on-demand-start-backoff=[S]",
"Specify light client initial backoff time for a request",
ARG arg_on_demand_request_backoff_max: (Option<u64>) = None, or |c: &Config| c.light.as_ref()?.on_demand_request_backoff_max,
"--on-demand-end-backoff=[S]",
"Specify light client maximum backoff time for a request",
ARG arg_on_demand_request_backoff_rounds_max: (Option<usize>) = None, or |c: &Config| c.light.as_ref()?.on_demand_request_backoff_rounds_max,
"--on-demand-max-backoff-rounds=[TIMES]",
"Specify light client maximum number of backoff iterations for a request",
ARG arg_on_demand_request_consecutive_failures: (Option<usize>) = None, or |c: &Config| c.light.as_ref()?.on_demand_request_consecutive_failures,
"--on-demand-consecutive-failures=[TIMES]",
"Specify light client the number of failures for a request until it gets exponentially backed off",
["Secret Store Options"]
FLAG flag_no_secretstore: (bool) = false, or |c: &Config| c.secretstore.as_ref()?.disable.clone(),
@@ -1402,8 +1414,11 @@ struct Whisper {
#[derive(Default, Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
struct Light {
on_demand_retry_count: Option<usize>,
on_demand_inactive_time_limit: Option<u64>,
on_demand_response_time_window: Option<u64>,
on_demand_request_backoff_start: Option<u64>,
on_demand_request_backoff_max: Option<u64>,
on_demand_request_backoff_rounds_max: Option<usize>,
on_demand_request_consecutive_failures: Option<usize>,
}
#[cfg(test)]
@@ -1820,8 +1835,11 @@ mod tests {
arg_snapshot_threads: None,
// -- Light options.
arg_on_demand_retry_count: Some(15),
arg_on_demand_inactive_time_limit: Some(15000),
arg_on_demand_response_time_window: Some(2000),
arg_on_demand_request_backoff_start: Some(9000),
arg_on_demand_request_backoff_max: Some(15000),
arg_on_demand_request_backoff_rounds_max: Some(100),
arg_on_demand_request_consecutive_failures: Some(1),
// -- Whisper options.
flag_whisper: false,
@@ -2075,8 +2093,11 @@ mod tests {
num_verifiers: None,
}),
light: Some(Light {
on_demand_retry_count: Some(12),
on_demand_inactive_time_limit: Some(20000),
on_demand_response_time_window: Some(2000),
on_demand_request_backoff_start: Some(9000),
on_demand_request_backoff_max: Some(15000),
on_demand_request_backoff_rounds_max: Some(10),
on_demand_request_consecutive_failures: Some(1),
}),
snapshots: Some(Snapshots {
disable_periodic: Some(true),

7
parity/cli/tests/config.full.toml
View File

@@ -157,8 +157,11 @@ scale_verifiers = true
num_verifiers = 6
[light]
on_demand_retry_count = 15
on_demand_inactive_time_limit = 15000
on_demand_response_time_window = 2000
on_demand_request_backoff_start = 9000
on_demand_request_backoff_max = 15000
on_demand_request_backoff_rounds_max = 100
on_demand_request_consecutive_failures = 1
[snapshots]
disable_periodic = false

7
parity/cli/tests/config.toml
View File

@@ -71,8 +71,11 @@ fat_db = "off"
scale_verifiers = false
[light]
on_demand_retry_count = 12
on_demand_inactive_time_limit = 20000
on_demand_response_time_window = 2000
on_demand_request_backoff_start = 9000
on_demand_request_backoff_max = 15000
on_demand_request_backoff_rounds_max = 10
on_demand_request_consecutive_failures = 1
[snapshots]
disable_periodic = true