1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
require 'base64'
require 'gitaly'
module Gitlab
module GitalyClient
module MigrationStatus
DISABLED = 1
OPT_IN = 2
OPT_OUT = 3
end
SERVER_VERSION_FILE = 'GITALY_SERVER_VERSION'.freeze
MUTEX = Mutex.new
private_constant :MUTEX
def self.stub(name, storage)
MUTEX.synchronize do
@stubs ||= {}
@stubs[storage] ||= {}
@stubs[storage][name] ||= begin
klass = Gitaly.const_get(name.to_s.camelcase.to_sym).const_get(:Stub)
addr = address(storage)
addr = addr.sub(%r{^tcp://}, '') if URI(addr).scheme == 'tcp'
klass.new(addr, :this_channel_is_insecure)
end
end
end
def self.clear_stubs!
MUTEX.synchronize do
@stubs = nil
end
end
def self.address(storage)
params = Gitlab.config.repositories.storages[storage]
raise "storage not found: #{storage.inspect}" if params.nil?
address = params['gitaly_address']
unless address.present?
raise "storage #{storage.inspect} is missing a gitaly_address"
end
unless URI(address).scheme.in?(%w(tcp unix))
raise "Unsupported Gitaly address: #{address.inspect} does not use URL scheme 'tcp' or 'unix'"
end
address
end
# All Gitaly RPC call sites should use GitalyClient.call. This method
# makes sure that per-request authentication headers are set.
def self.call(storage, service, rpc, request)
metadata = request_metadata(storage)
metadata = yield(metadata) if block_given?
stub(service, storage).__send__(rpc, request, metadata) # rubocop:disable GitlabSecurity/PublicSend
end
def self.request_metadata(storage)
encoded_token = Base64.strict_encode64(token(storage).to_s)
{ metadata: { 'authorization' => "Bearer #{encoded_token}" } }
end
def self.token(storage)
params = Gitlab.config.repositories.storages[storage]
raise "storage not found: #{storage.inspect}" if params.nil?
params['gitaly_token'].presence || Gitlab.config.gitaly['token']
end
# Evaluates whether a feature toggle is on or off
def self.feature_enabled?(feature_name, status: MigrationStatus::OPT_IN)
# Disabled features are always off!
return false if status == MigrationStatus::DISABLED
feature = Feature.get("gitaly_#{feature_name}")
# If the feature has been set, always evaluate
if Feature.persisted?(feature)
if feature.percentage_of_time_value > 0
# Probabilistically enable this feature
return Random.rand() * 100 < feature.percentage_of_time_value
end
return feature.enabled?
end
# If the feature has not been set, the default depends
# on it's status
case status
when MigrationStatus::OPT_OUT
true
when MigrationStatus::OPT_IN
opt_into_all_features?
else
false
end
end
# opt_into_all_features? returns true when the current environment
# is one in which we opt into features automatically
def self.opt_into_all_features?
Rails.env.development? || ENV["GITALY_FEATURE_DEFAULT_ON"] == "1"
end
private_class_method :opt_into_all_features?
def self.migrate(feature, status: MigrationStatus::OPT_IN)
is_enabled = feature_enabled?(feature, status: status)
metric_name = feature.to_s
metric_name += "_gitaly" if is_enabled
Gitlab::Metrics.measure(metric_name) do
yield is_enabled
end
end
def self.expected_server_version
path = Rails.root.join(SERVER_VERSION_FILE)
path.read.chomp
end
def self.encode(s)
s.dup.force_encoding(Encoding::ASCII_8BIT)
end
end
end
|
