1 # -*- encoding: binary -*-
3 # \MogileFS administration client, this has little real-world usage
4 # and is considered a work-in-progress
5 class MogileFS::Admin < MogileFS::Client
8 # Enumerates fids using #list_fids. Returns the number of valid fids
16 fids.each { |fid| yield fid }
18 end while last = fids[-1] and low = last["fid"]
23 # Returns an Array of host status Hashes. If +hostid+ is given only that
30 # [{"status"=>"alive",
31 # "http_get_port"=>nil,
35 # "hostname"=>"rur-1",
39 def get_hosts(hostid = nil)
40 to_i = %w(hostid http_port http_get_port)
41 clean('hosts', 'host',
42 @backend.get_hosts(hostid ? { :hostid => hostid } : {}), true, to_i)
46 # Returns an Array of device status Hashes. If devid is given only that
53 # [{"status"=>"alive",
59 # "mb_total"=>666666}]
61 def get_devices(devid = nil)
62 to_i = %w(mb_asof mb_free mb_used mb_total devid weight hostid)
63 rv = @backend.get_devices(devid ? { :devid => devid } : {})
64 rv = clean('devices', 'dev', rv, true, to_i)
66 u = row["utilization"] and
67 row["utilization"] = nil == u ? nil : u.to_f
68 case row["reject_bad_md5"]
70 row["reject_bad_md5"] = true
72 row["reject_bad_md5"] = false
78 # Returns an Array of fid Hashes from +from_fid+, limited to +count+
80 # admin.list_fids 0, 100
95 # "key"=>"new_new_key"}]
97 def list_fids(from_fid, count = 100)
98 to_i = %w(fid devcount length)
99 # :to is now :count internally in mogilefsd
100 clean('fid_count', 'fid_',
101 @backend.list_fids(:from => from_fid, :to => count), true, to_i)
105 # Returns a statistics structure representing the state of mogilefs.
107 # *** This command no longer works with recent versions of MogileFS ***
108 # *** Use mogstats(1) from the MogileFS::Utils package on CPAN ***
114 # {"fids"=>{"max"=>"99", "count"=>"2"},
116 # [{"status"=>"alive", "files"=>"2", "id"=>"1", "host"=>"rur-1"},
117 # {"status"=>"alive", "files"=>"2", "id"=>"2", "host"=>"rur-2"}],
119 # [{"files"=>"2", "class"=>"normal", "devcount"=>"2", "domain"=>"test"}],
120 # "file"=>[{"files"=>"2", "class"=>"normal", "domain"=>"test"}]}
122 def get_stats(type = 'all')
123 res = @backend.stats type => 1
126 stats['device'] = clean 'devicescount', 'devices', res, false
127 stats['file'] = clean 'filescount', 'files', res, false
128 stats['replication'] = clean 'replicationcount', 'replication', res, false
130 if res['fidmax'] or res['fidcount'] then
132 'max' => res['fidmax'].to_i,
133 'count' => res['fidcount'].to_i
137 stats.delete 'device' if stats['device'].empty?
138 stats.delete 'file' if stats['file'].empty?
139 stats.delete 'replication' if stats['replication'].empty?
145 # Returns the domains and classes, and their policies present in the mogilefs.
149 # Returns (on newer MogileFS servers):
153 # "mindevcount" => 2,
154 # "replpolicy" => "MultipleHosts()",
160 # Returns (on older MogileFS servers without replication policies):
162 # {"test"=>{"normal"=>3, "default"=>2}}
165 res = @backend.get_domains
166 have_replpolicy = false
169 to_i = %w(mindevcount)
170 want = %w(name replpolicy hashtype mindevcount)
171 (1..res['domains'].to_i).each do |i|
172 domain = clean("domain#{i}classes", "domain#{i}class", res, false, to_i,
174 tmp = domains[res["domain#{i}"]] = {}
176 tmp[d.delete("name")] = d
177 have_replpolicy ||= d.include?("replpolicy")
181 # only for MogileFS 1.x?, maybe we can drop support for this...
182 unless have_replpolicy
183 domains.each do |namespace, class_data|
184 class_data.each do |class_name, data|
185 class_data[class_name] = data["mindevcount"]
194 # Creates a new domain named +domain+. Returns nil if creation failed.
196 def create_domain(domain)
197 raise MogileFS::ReadOnlyError if readonly?
198 res = @backend.create_domain :domain => domain
199 res ? res['domain'] : nil
203 # Deletes +domain+. Returns true if successful, raises
204 # MogileFS::Backend::DomainNotFoundError if not
206 def delete_domain(domain)
207 raise MogileFS::ReadOnlyError if readonly?
208 ! @backend.delete_domain(:domain => domain).nil?
212 # Creates a new class in +domain+ named +klass+ with +policy+ for
213 # replication. Raises on failure.
215 def create_class(domain, klass, policy)
216 modify_class(domain, klass, policy, :create)
220 # Updates class +klass+ in +domain+ with +policy+ for replication.
223 def update_class(domain, klass, policy)
224 modify_class(domain, klass, policy, :update)
228 # Removes class +klass+ from +domain+. Returns true if successful.
231 def delete_class(domain, klass)
232 ! @backend.delete_class(:domain => domain, :class => klass).nil?
236 # Creates a new host named +host+. +args+ must contain :ip and :port.
237 # Returns true if successful, false if not.
239 def create_host(host, args = {})
240 raise ArgumentError, "Must specify ip and port" unless \
241 args.include? :ip and args.include? :port
243 modify_host(host, args, 'create')
247 # Updates +host+ with +args+. Returns true if successful, false if not.
249 def update_host(host, args = {})
250 modify_host(host, args, 'update')
254 # Deletes host +host+. Returns nil on failure.
256 def delete_host(host)
257 raise MogileFS::ReadOnlyError if readonly?
258 ! @backend.delete_host(:host => host).nil?
262 # Creates device with Integer +devid+ on +host+
263 # +host+ may be an integer for hostid or String for hostname
264 def create_device(host, devid, opts = {})
265 raise MogileFS::ReadOnlyError if readonly?
272 opts[:hostname] = host
274 raise ArgumentError, "host=#{host.inspect} is not a String or Integer"
278 ! @backend.create_device(opts).nil?
282 # Changes the device status of +device+ on +host+ to +state+ which can be
283 # 'alive', 'down', or 'dead'.
285 def change_device_state(host, device, state)
286 raise MogileFS::ReadOnlyError if readonly?
287 ! @backend.set_state(:host => host, :device => device, :state => state).nil?
291 # Changes the device weight of +device+ on +host+ to +weight+.
292 # +weight+ should be a non-negative Integer. Devices with higher
293 # +weight+ values are more likely to be chosen for reads and writes.
294 def change_device_weight(host, device, weight)
295 raise MogileFS::ReadOnlyError if readonly?
296 opts = { :host => host, :device => device, :weight => weight }
297 ! @backend.set_weight(opts).nil?
300 # reschedules all deferred replication, returns a hash with the number
301 # of files rescheduled:
303 # admin.replicate_now => { "count" => 5 }
305 rv = @backend.replicate_now
306 rv["count"] = rv["count"].to_i
310 # Clears the tracker caches. Not implemented in all versions of MogileFS
315 protected unless defined? $TESTING
318 # Modifies +klass+ on +domain+ to store files on +mindevcount+ devices via
319 # +action+. Returns the class name if successful, raises if not
321 def modify_class(domain, klass, policy, action)
322 raise MogileFS::ReadOnlyError if readonly?
323 args = { :domain => domain, :class => klass }
326 args[:mindevcount] = policy
328 args[:replpolicy] = policy
333 "policy=#{policy.inspect} not understood for #{action}_class"
335 @backend.__send__("#{action}_class", args)["class"]
339 # Modifies +host+ using +args+ via +action+. Returns true if successful,
342 def modify_host(host, args = {}, action = 'create')
344 ! @backend.__send__("#{action}_host", args).nil?
348 # Turns the response +res+ from the backend into an Array of Hashes from 1
349 # to res[+count+]. If +underscore+ is true then a '_' character is assumed
350 # between the prefix and the hash key value.
352 # res = {"host1_remoteroot"=>"/mnt/mogilefs/rur-1",
353 # "host1_hostname"=>"rur-1",
354 # "host1_hostid"=>"1",
355 # "host1_http_get_port"=>"",
358 # "host1_hostip"=>"",
359 # "host1_http_port"=>"",
360 # "host1_status"=>"alive",
361 # "host1_altmask"=>""}
362 # admin.clean 'hosts', 'host', res
366 # [{"status"=>"alive",
367 # "http_get_port"=>nil,
370 # "hostip"=>"192.168.1.3",
371 # "hostname"=>"rur-1",
375 def clean(count, prefix, res, underscore = true, to_i = [], want = nil)
377 underscore = underscore ? '_' : empty
379 # convert array to hash for O(1) lookups
380 to_i = to_i.inject({}) { |m,k| m[k] = m }
382 (1..res[count].to_i).map do |i|
385 v = res["#{prefix}#{i}#{underscore}#{k}"] or next
386 row[k] = to_i.include?(k) ? (empty == v ? nil : v.to_i) : v
392 (1..res[count].to_i).map do |i|
393 re = /^#{prefix}#{i}#{underscore}/
395 keys.grep(re).each do |k|
398 row[k] = to_i.include?(k) ? (empty == v ? nil : v.to_i) : v