/
redis_store.rb
658 lines (550 loc) · 16.9 KB
/
redis_store.rb
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# frozen_string_literal: true
require 'json'
require 'logster/base_store'
require 'logster/redis_rate_limiter'
module Logster
class RedisStore < BaseStore
ENV_PREFIX = "logster-env-"
attr_accessor :redis, :max_backlog, :redis_raw_connection
attr_writer :redis_prefix
def initialize(redis = nil)
super()
@redis = redis || Redis.new
@max_backlog = 1000
@redis_prefix = nil
@redis_raw_connection = nil
end
def save(message)
if keys = message.solved_keys
keys.each do |solved|
return false if @redis.hget(solved_key, solved)
end
end
@redis.multi do
@redis.hset(grouping_key, message.grouping_key, message.key)
@redis.rpush(list_key, message.key)
update_message(message, save_env: true)
end
trim
check_rate_limits(message.severity)
true
end
def delete(msg)
groups = find_pattern_groups() { |pat| msg.message =~ pat }
@redis.multi do
groups.each do |group|
group.remove_message(msg)
save_pattern_group(group) if group.changed?
end
@redis.hdel(hash_key, msg.key)
delete_env(msg.key)
@redis.hdel(grouping_key, msg.grouping_key)
@redis.lrem(list_key, -1, msg.key)
end
end
def bulk_delete(message_keys, grouping_keys)
groups = find_pattern_groups(load_messages: true)
@redis.multi do
groups.each do |group|
group.messages = group.messages.reject { |m| message_keys.include?(m.key) }
save_pattern_group(group) if group.changed?
end
@redis.hdel(hash_key, message_keys)
@redis.hdel(grouping_key, grouping_keys)
message_keys.each do |k|
@redis.lrem(list_key, -1, k)
delete_env(k)
end
end
end
def replace_and_bump(message)
# TODO make it atomic
exists = @redis.hexists(hash_key, message.key)
return false unless exists
@redis.multi do
@redis.hset(hash_key, message.key, message.to_json(exclude_env: true))
push_env(message.key, message.env_buffer) if message.has_env_buffer?
@redis.lrem(list_key, -1, message.key)
@redis.rpush(list_key, message.key)
end
message.env_buffer = [] if message.has_env_buffer?
check_rate_limits(message.severity)
true
end
def similar_key(message)
@redis.hget(grouping_key, message.grouping_key)
end
def count
@redis.llen(list_key)
end
def solve(message_key)
if (message = get(message_key)) && (keys = message.solved_keys)
# add a time so we can expire it
keys.each do |s_key|
@redis.hset(solved_key, s_key, Time.now.to_f.to_i)
end
end
clear_solved
end
def latest(opts = {})
limit = opts[:limit] || 50
severity = opts[:severity]
before = opts[:before]
after = opts[:after]
search = opts[:search]
with_env = opts.key?(:with_env) ? opts[:with_env] : true
known_groups = opts[:known_groups]&.dup || []
start, finish = find_location(before, after, limit)
return [] unless start && finish
results = []
pattern_groups = find_pattern_groups(load_messages: true)
direction = after ? 1 : -1
begin
keys = @redis.lrange(list_key, start, finish) || []
break if !keys || keys.count <= 0
rows = bulk_get(keys, with_env: with_env).reverse
temp = []
rows.each do |row|
break if before && before == row.key
row = nil if severity && !severity.include?(row.severity)
row = filter_search(row, search)
if row
matches_pattern = pattern_groups.any? { |g| row.message =~ g.pattern }
group = pattern_groups.find { |g| g.messages_keys.include?(row.key) }
if group && !known_groups.include?(group.key)
known_groups << group.key
temp << serialize_group(group, row.key)
elsif !matches_pattern
temp << row
end
end
end
temp.reverse!
if direction == -1
results = temp + results
else
results += temp
end
start += limit * direction
finish += limit * direction
finish = -1 if finish > -1
end while rows.length > 0 && results.length < limit && start < 0
results
end
def clear
RedisRateLimiter.clear_all(@redis)
@redis.del(solved_key)
all_keys = @redis.lrange(list_key, 0, -1)
@redis.del(list_key)
protected_keys = @redis.smembers(protected_key) || []
if protected_keys.empty?
@redis.del(hash_key)
all_keys.each { |k| delete_env(k) }
@redis.del(pattern_groups_key)
@redis.del(grouping_key)
else
protected_messages = @redis.mapped_hmget(hash_key, *protected_keys)
@redis.del(hash_key)
@redis.mapped_hmset(hash_key, protected_messages)
(all_keys - protected_keys).each { |k| delete_env(k) }
sorted = protected_messages
.values
.map { |string|
Message.from_json(string) rescue nil
}
.compact
.sort
.map(&:key)
@redis.pipelined do
sorted.each do |message_key|
@redis.rpush(list_key, message_key)
end
end
find_pattern_groups(load_messages: true).each do |group|
group.messages = group.messages.select { |m| sorted.include?(m.key) }
save_pattern_group(group) if group.changed?
end
end
end
# Delete everything, included protected messages
# (use in tests)
def clear_all
@redis.lrange(list_key, 0, -1).each { |k| delete_env(k) }
@redis.del(list_key)
@redis.del(protected_key)
@redis.del(hash_key)
@redis.del(grouping_key)
@redis.del(solved_key)
@redis.del(ignored_logs_count_key)
@redis.del(pattern_groups_key)
Logster::Pattern.child_classes.each do |klass|
@redis.del(klass.set_name)
end
@redis.keys.each do |key|
@redis.del(key) if key.include?(Logster::RedisRateLimiter::PREFIX)
@redis.del(key) if key.start_with?(ip_rate_limit_key(""))
end
end
def get(message_key, load_env: true)
json = @redis.hget(hash_key, message_key)
return nil unless json
message = Message.from_json(json)
if load_env
message.env = get_env(message_key) || {}
end
message
end
def get_all_messages(with_env: true)
bulk_get(@redis.lrange(list_key, 0, -1), with_env: with_env)
end
BULK_ENV_GET_LUA = <<~LUA
local results = {};
for i = 1, table.getn(KEYS), 1 do
results[i] = { KEYS[i], redis.call('LRANGE', KEYS[i], 0, -1) };
end
return results;
LUA
def bulk_get(message_keys, with_env: true)
return [] if !message_keys || message_keys.size == 0
envs = nil
if with_env
envs = {}
@redis.eval(
BULK_ENV_GET_LUA,
keys: message_keys.map { |k| env_prefix(k) }
).to_h.each do |k, v|
next if v.size == 0
parsed = v.size == 1 ? JSON.parse(v[0]) : v.map { |e| JSON.parse(e) }
envs[env_unprefix(k)] = parsed
end
end
messages = @redis.hmget(hash_key, message_keys).map! do |json|
next if !json || json.size == 0
message = Message.from_json(json)
if with_env && envs
env = envs[message.key]
if !message.env || message.env.size == 0
message.env = env || {}
end
end
message
end
messages.compact!
messages
end
def get_env(message_key)
envs = @redis.lrange(env_prefix(message_key), 0, -1)
return if !envs || envs.size == 0
envs.size == 1 ? JSON.parse(envs[0]) : envs.map { |j| JSON.parse(j) }
end
def protect(message_key)
if message = get(message_key, load_env: false)
message.protected = true
update_message(message)
end
end
def unprotect(message_key)
if message = get(message_key, load_env: false)
message.protected = false
update_message(message)
else
raise "Message already deleted"
end
end
def solved
@redis.hkeys(solved_key) || []
end
def register_rate_limit_per_minute(severities, limit, &block)
register_rate_limit(severities, limit, 60, block)
end
def register_rate_limit_per_hour(severities, limit, &block)
register_rate_limit(severities, limit, 3600, block)
end
def redis_prefix
return 'default'.freeze if !@redis_prefix
@prefix_is_proc ||= @redis_prefix.respond_to?(:call)
@prefix_is_proc ? @redis_prefix.call : @redis_prefix
end
def rate_limits
@rate_limits ||= {}
end
def insert_pattern(set_name, pattern)
@redis.sadd(set_name, pattern)
end
def remove_pattern(set_name, pattern)
@redis.srem(set_name, pattern)
end
def get_patterns(set_name)
@redis.smembers(set_name)
end
def increment_ignore_count(pattern)
@redis.hincrby(ignored_logs_count_key, pattern, 1)
end
def remove_ignore_count(pattern)
@redis.hdel(ignored_logs_count_key, pattern)
end
def get_all_ignore_count
@redis.hgetall(ignored_logs_count_key)
end
def rate_limited?(ip_address, perform: false, limit: 60)
key = ip_rate_limit_key(ip_address)
limited = @redis.exists(key)
if perform && !limited
@redis.setex key, limit, ""
end
limited
end
def find_pattern_groups(load_messages: false)
patterns = @patterns_cache.fetch(Logster::GroupingPattern::CACHE_KEY) do
Logster::GroupingPattern.find_all(store: self)
end
patterns = patterns.select do |pattern|
if block_given?
yield(pattern)
else
true
end
end
return [] if patterns.size == 0
mapped = patterns.map(&:inspect)
jsons = @redis.hmget(pattern_groups_key, mapped)
jsons.map! do |json|
if json && json.size > 0
group = Logster::Group.from_json(json)
group.pattern = patterns[mapped.index(group.key)]
if load_messages
group.messages = bulk_get(group.messages_keys, with_env: false)
end
group
end
end
jsons.compact!
jsons
end
def save_pattern_group(group)
if group.messages_keys.size == 0
@redis.hdel(pattern_groups_key, group.key)
else
@redis.hset(pattern_groups_key, group.key, group.to_json)
end
end
def remove_pattern_group(pattern)
@redis.hdel(pattern_groups_key, pattern.inspect)
end
protected
def clear_solved
ignores = Set.new(@redis.hkeys(solved_key) || [])
if ignores.length > 0
message_keys = @redis.lrange(list_key, 0, -1) || []
bulk_get(message_keys).each do |message|
unless (ignores & (message.solved_keys || [])).empty?
delete message
end
end
end
end
def trim
if @redis.llen(list_key) > max_backlog
removed_keys = []
while removed_key = @redis.lpop(list_key)
unless @redis.sismember(protected_key, removed_key)
rmsg = get(removed_key, load_env: false)
delete(rmsg)
break
else
removed_keys << removed_key
end
end
removed_keys.reverse.each do |key|
@redis.lpush(list_key, key)
end
end
end
def update_message(message, save_env: false)
@redis.hset(hash_key, message.key, message.to_json(exclude_env: true))
push_env(message.key, message.env) if save_env
if message.protected
@redis.sadd(protected_key, message.key)
else
@redis.srem(protected_key, message.key)
end
end
def find_message(list, message_key)
limit = 50
start = 0
finish = limit - 1
found = nil
while found == nil
items = @redis.lrange(list, start, finish)
break unless items && items.length > 0
found = items.index(message_key)
break if found
start += limit
finish += limit
end
found
end
def find_location(before, after, limit)
start = -limit
finish = -1
return [start, finish] unless before || after
found = nil
find = before || after
while !found
items = @redis.lrange(list_key, start, finish)
break unless items && items.length > 0
found = items.index(find)
if items.length < limit
found += limit - items.length if found
break
end
break if found
start -= limit
finish -= limit
end
if found
if before
offset = -(limit - found)
else
offset = found + 1
end
start += offset
finish += offset
finish = -1 if finish > -1
return nil if start > -1
end
[start, finish]
end
def get_search(search)
exclude = false
if String === search && search[0] == "-"
exclude = true
search = search.sub("-", "")
end
[search, exclude]
end
def filter_search(row, search)
search, exclude = get_search(search)
return row unless row && search
if exclude
row if !(row =~ search) && filter_env!(row, search, exclude)
else
row if row =~ search || filter_env!(row, search)
end
end
def filter_env!(message, search, exclude = false)
if Array === message.env
array_env_matches?(message, search, exclude)
else
if exclude
!env_matches?(message.env, search)
else
env_matches?(message.env, search)
end
end
end
def env_matches?(env, search)
return false unless env && search
env.values.any? do |value|
if Hash === value
env_matches?(value, search)
else
case search
when Regexp
value.to_s =~ search
when String
value.to_s =~ Regexp.new(search, Regexp::IGNORECASE)
else
false
end
end
end
end
def array_env_matches?(message, search, exclude)
matches = message.env.select do |env|
if exclude
!env_matches?(env, search)
else
env_matches?(env, search)
end
end
return false if matches.empty?
message.env = matches
message.count = matches.size
true
end
def check_rate_limits(severity)
rate_limits_to_check = rate_limits[self.redis_prefix]
return if !rate_limits_to_check
rate_limits_to_check.each { |rate_limit| rate_limit.check(severity) }
end
def solved_key
@solved_key ||= "__LOGSTER__SOLVED_MAP"
end
def list_key
@list_key ||= "__LOGSTER__LATEST"
end
def hash_key
@hash_key ||= "__LOGSTER__MAP"
end
def env_key
@env_key ||= "__LOGSTER__ENV_MAP"
end
def protected_key
@protected_key ||= "__LOGSTER__SAVED"
end
def grouping_key
@grouping_key ||= "__LOGSTER__GMAP"
end
def ignored_logs_count_key
@ignored_logs_count_key ||= "__LOGSTER__IGNORED_LOGS_COUNT_KEY__MAP"
end
def ip_rate_limit_key(ip_address)
"__LOGSTER__IP_RATE_LIMIT_#{ip_address}"
end
def pattern_groups_key
@pattern_groups_key ||= "__LOGSTER__PATTERN_GROUPS_KEY__MAP"
end
private
def serialize_group(group, row_id)
# row_id should be the key of the most recent *message* that is
# included in the group.
# It's used by the client in the before (not after) query param
# when you hit load more and the first row is a group.
# The server uses this info (row_id) to know where it needs to
# start scanning messages when looking up older messages.
Logster::Group::GroupWeb.new(
group.key,
group.count,
group.timestamp,
group.messages,
row_id
)
end
def register_rate_limit(severities, limit, duration, callback)
severities = [severities] unless severities.is_a?(Array)
redis = (@redis_raw_connection && @redis_prefix) ? @redis_raw_connection : @redis
rate_limiter = RedisRateLimiter.new(
redis, severities, limit, duration, Proc.new { redis_prefix }, callback
)
rate_limits[self.redis_prefix] ||= []
rate_limits[self.redis_prefix] << rate_limiter
rate_limiter
end
def push_env(message_key, env)
prefixed = env_prefix(message_key)
env = [env] unless Array === env
@redis.lpush(prefixed, env.map(&:to_json).reverse)
@redis.ltrim(prefixed, 0, Logster.config.max_env_count_per_message - 1)
end
def delete_env(message_key)
@redis.del(env_prefix(message_key))
end
def env_unprefix(key)
key.sub(ENV_PREFIX, "")
end
def env_prefix(key)
ENV_PREFIX + key
end
end
end