diff options
Diffstat (limited to 'lib/gitlab/git/storage/circuit_breaker.rb')
-rw-r--r-- | lib/gitlab/git/storage/circuit_breaker.rb | 106 |
1 files changed, 4 insertions, 102 deletions
diff --git a/lib/gitlab/git/storage/circuit_breaker.rb b/lib/gitlab/git/storage/circuit_breaker.rb index 4328c0ea29b..898bb1b65be 100644 --- a/lib/gitlab/git/storage/circuit_breaker.rb +++ b/lib/gitlab/git/storage/circuit_breaker.rb @@ -4,22 +4,11 @@ module Gitlab class CircuitBreaker include CircuitBreakerSettings - FailureInfo = Struct.new(:last_failure, :failure_count) - attr_reader :storage, - :hostname, - :storage_path - - delegate :last_failure, :failure_count, to: :failure_info - - def self.reset_all! - Gitlab::Git::Storage.redis.with do |redis| - all_storage_keys = redis.zrange(Gitlab::Git::Storage::REDIS_KNOWN_KEYS, 0, -1) - redis.del(*all_storage_keys) unless all_storage_keys.empty? - end + :hostname - RequestStore.delete(:circuitbreaker_cache) - end + delegate :last_failure, :failure_count, :no_failures?, + to: :failure_info def self.for_storage(storage) cached_circuitbreakers = RequestStore.fetch(:circuitbreaker_cache) do @@ -46,9 +35,6 @@ module Gitlab def initialize(storage, hostname) @storage = storage @hostname = hostname - - config = Gitlab.config.repositories.storages[@storage] - @storage_path = config['path'] end def perform @@ -65,15 +51,6 @@ module Gitlab failure_count > failure_count_threshold end - def backing_off? - return false if no_failures? - - recent_failure = last_failure > failure_wait_time.seconds.ago - too_many_failures = failure_count > backoff_threshold - - recent_failure && too_many_failures - end - private # The circuitbreaker can be enabled for the entire fleet using a Feature @@ -86,88 +63,13 @@ module Gitlab end def failure_info - @failure_info ||= get_failure_info - end - - # Memoizing the `storage_available` call means we only do it once per - # request when the storage is available. - # - # When the storage appears not available, and the memoized value is `false` - # we might want to try again. - def storage_available? - return @storage_available if @storage_available - - if @storage_available = Gitlab::Git::Storage::ForkedStorageCheck - .storage_available?(storage_path, storage_timeout, access_retries) - track_storage_accessible - else - track_storage_inaccessible - end - - @storage_available + @failure_info ||= FailureInfo.load(cache_key) end def check_storage_accessible! if circuit_broken? raise Gitlab::Git::Storage::CircuitOpen.new("Circuit for #{storage} is broken", failure_reset_time) end - - if backing_off? - raise Gitlab::Git::Storage::Failing.new("Backing off access to #{storage}", failure_wait_time) - end - - unless storage_available? - raise Gitlab::Git::Storage::Inaccessible.new("#{storage} not accessible", failure_wait_time) - end - end - - def no_failures? - last_failure.blank? && failure_count == 0 - end - - def track_storage_inaccessible - @failure_info = FailureInfo.new(Time.now, failure_count + 1) - - Gitlab::Git::Storage.redis.with do |redis| - redis.pipelined do - redis.hset(cache_key, :last_failure, last_failure.to_i) - redis.hincrby(cache_key, :failure_count, 1) - redis.expire(cache_key, failure_reset_time) - maintain_known_keys(redis) - end - end - end - - def track_storage_accessible - @failure_info = FailureInfo.new(nil, 0) - - Gitlab::Git::Storage.redis.with do |redis| - redis.pipelined do - redis.hset(cache_key, :last_failure, nil) - redis.hset(cache_key, :failure_count, 0) - maintain_known_keys(redis) - end - end - end - - def maintain_known_keys(redis) - expire_time = Time.now.to_i + failure_reset_time - redis.zadd(Gitlab::Git::Storage::REDIS_KNOWN_KEYS, expire_time, cache_key) - redis.zremrangebyscore(Gitlab::Git::Storage::REDIS_KNOWN_KEYS, '-inf', Time.now.to_i) - end - - def get_failure_info - last_failure, failure_count = Gitlab::Git::Storage.redis.with do |redis| - redis.hmget(cache_key, :last_failure, :failure_count) - end - - last_failure = Time.at(last_failure.to_i) if last_failure.present? - - FailureInfo.new(last_failure, failure_count.to_i) - end - - def cache_key - @cache_key ||= "#{Gitlab::Git::Storage::REDIS_KEY_PREFIX}#{storage}:#{hostname}" end end end |