2 # Copyright (C) The Arvados Authors. All rights reserved.
4 # SPDX-License-Identifier: AGPL-3.0
15 def ensure_dir(path, mode, owner, group)
22 FileUtils.chown(owner, group, path)
27 req_envs = %w(ARVADOS_API_HOST ARVADOS_API_TOKEN ARVADOS_VIRTUAL_MACHINE_UUID)
30 abort "Fatal: These environment vars must be set: #{req_envs}"
35 OptionParser.new do |parser|
36 parser.on('--exclusive', 'Manage SSH keys file exclusively.')
37 parser.on('--rotate-tokens', 'Force a rotation of all user tokens.')
38 parser.on('--skip-missing-users', "Don't try to create any local accounts.")
39 parser.on('--token-lifetime SECONDS', 'Create user tokens that expire after SECONDS.', Integer)
40 parser.on('--debug', 'Enable debug output')
41 end.parse!(into: options)
43 exclusive_banner = "#######################################################################################
44 # THIS FILE IS MANAGED BY #{$0} -- CHANGES WILL BE OVERWRITTEN #
45 #######################################################################################\n\n"
46 start_banner = "### BEGIN Arvados-managed keys -- changes between markers will be overwritten\n"
47 end_banner = "### END Arvados-managed keys -- changes between markers will be overwritten\n"
50 # These names correspond to the names in the cluster Users configuration.
51 # Managing everything was the original behavior.
52 SyncUserAccounts: true,
54 SyncUserSSHKeys: true,
55 SyncUserAPITokens: true,
65 arv = Arvados.new({ :suppress_ssl_warnings => false })
66 logincluster_host = ENV['ARVADOS_API_HOST']
67 logincluster_name = arv.cluster_config['Login']['LoginCluster'] or ''
68 # Requiring the fuse group was previous hardcoded behavior
69 minimum_groups = arv.cluster_config['Login']['SyncRequiredGroups'] || ['fuse']
70 actions.each_pair do |key, default|
71 actions[key] = arv.cluster_config['Login'].fetch(key.to_s, default)
74 if logincluster_name != '' and logincluster_name != arv.cluster_config['ClusterID']
75 logincluster_host = arv.cluster_config['RemoteClusters'][logincluster_name]['Host']
77 logincluster_arv = Arvados.new({ :api_host => logincluster_host,
78 :suppress_ssl_warnings => false })
80 vm_uuid = ENV['ARVADOS_VIRTUAL_MACHINE_UUID']
82 logins = arv.virtual_machine.logins(:uuid => vm_uuid)[:items]
83 logins = [] if logins.nil?
84 logins = logins.reject { |l| l[:username].nil? or l[:hostname].nil? or l[:virtual_machine_uuid] != vm_uuid }
88 open("/etc/login.defs", encoding: "utf-8") do |login_defs|
89 login_defs.each_line do |line|
90 next unless match = /^UID_MIN\s+(\S+)$/.match(line)
91 if match[1].start_with?("0x")
93 elsif match[1].start_with?("0")
98 new_uid_min = match[1].to_i(base)
99 uid_min = new_uid_min if (new_uid_min > 0)
104 logins.reject! do |l|
105 if not pwnam[l[:username]]
107 pwnam[l[:username]] = Etc.getpwnam(l[:username])
109 if options[:"skip-missing-users"]
110 STDERR.puts "Account #{l[:username]} not found. Skipping"
114 if pwnam[l[:username]].uid < uid_min
115 STDERR.puts "Account #{l[:username]} uid #{pwnam[l[:username]].uid} < uid_min #{uid_min}. Skipping" if debug
125 STDERR.puts("Considering #{l[:username]} ...") if debug
126 keys[l[:username]] = Array.new() if not keys.has_key?(l[:username])
129 # Handle putty-style ssh public keys
130 key.sub!(/^(Comment: "r[^\n]*\n)(.*)$/m,'ssh-rsa \2 \1')
131 key.sub!(/^(Comment: "d[^\n]*\n)(.*)$/m,'ssh-dss \2 \1')
135 keys[l[:username]].push(key) if not keys[l[:username]].include?(key)
142 current_user_groups = Hash.new { |hash, key| hash[key] = [] }
143 while (ent = Etc.getgrent()) do
144 all_groups << ent.name
145 ent.mem.each do |member|
146 current_user_groups[member] << ent.name
152 next if seen[l[:username]]
153 seen[l[:username]] = true
155 username = l[:username]
157 unless pwnam[l[:username]]
158 unless actions[:SyncUserAccounts]
159 STDERR.puts "User #{username} does not exist and SyncUserAccounts=false. Skipping."
162 STDERR.puts "Creating account #{l[:username]}"
164 out, st = Open3.capture2e("useradd", "-m",
168 if st.exitstatus != 0
169 STDERR.puts "Account creation failed for #{l[:username]}:\n#{out}"
173 pwnam[username] = Etc.getpwnam(username)
175 STDERR.puts "Created account but then getpwnam() failed for #{l[:username]}: #{e}"
180 user_gid = pwnam[username].gid
181 homedir = pwnam[l[:username]].dir
182 if !File.exist?(homedir)
183 STDERR.puts "Cannot set up user #{username} because their home directory #{homedir} does not exist. Skipping."
187 if actions[:SyncUserGroups]
188 have_groups = current_user_groups[username]
189 want_groups = l[:groups] || []
190 want_groups |= minimum_groups
191 want_groups &= all_groups
193 (want_groups - have_groups).each do |addgroup|
194 # User should be in group, but isn't, so add them.
195 STDERR.puts "Add user #{username} to #{addgroup} group"
196 out, st = Open3.capture2e("usermod", "-aG", addgroup, username)
197 if st.exitstatus != 0
198 STDERR.puts "Failed to add #{username} to #{addgroup} group:\n#{out}"
202 (have_groups - want_groups).each do |removegroup|
203 # User is in a group, but shouldn't be, so remove them.
204 STDERR.puts "Remove user #{username} from #{removegroup} group"
205 out, st = Open3.capture2e("gpasswd", "-d", username, removegroup)
206 if st.exitstatus != 0
207 STDERR.puts "Failed to remove user #{username} from #{removegroup} group:\n#{out}"
212 if actions[:SyncUserSSHKeys]
213 userdotssh = File.join(homedir, ".ssh")
214 ensure_dir(userdotssh, 0700, username, user_gid)
216 newkeys = "###\n###\n" + keys[l[:username]].join("\n") + "\n###\n###\n"
218 keysfile = File.join(userdotssh, "authorized_keys")
220 oldkeys = File.read(keysfile)
225 if options[:exclusive]
226 newkeys = exclusive_banner + newkeys
227 elsif oldkeys.start_with?(exclusive_banner)
228 newkeys = start_banner + newkeys + end_banner
229 elsif (m = /^(.*?\n|)#{start_banner}(.*?\n|)#{end_banner}(.*)/m.match(oldkeys))
230 newkeys = m[1] + start_banner + newkeys + end_banner + m[3]
232 newkeys = start_banner + newkeys + end_banner + oldkeys
235 if oldkeys != newkeys then
236 File.open(keysfile, 'w', 0600) do |f|
239 FileUtils.chown(username, user_gid, keysfile)
243 if actions[:SyncUserAPITokens]
244 userdotconfig = File.join(homedir, ".config")
245 ensure_dir(userdotconfig, 0755, username, user_gid)
246 configarvados = File.join(userdotconfig, "arvados")
247 ensure_dir(configarvados, 0700, username, user_gid)
249 tokenfile = File.join(configarvados, "settings.conf")
252 STDERR.puts "Processing #{tokenfile} ..." if debug
254 if File.exist?(tokenfile)
255 # check if the token is still valid
256 myToken = ENV["ARVADOS_API_TOKEN"]
257 userEnv = File.read(tokenfile)
258 if (m = /^ARVADOS_API_TOKEN=(.*?\n)/m.match(userEnv))
260 tmp_arv = Arvados.new({ :api_host => logincluster_host,
261 :api_token => (m[1]),
262 :suppress_ssl_warnings => false })
264 rescue Arvados::TransactionFailedError => e
265 if e.to_s =~ /401 Unauthorized/
266 STDERR.puts "Account #{l[:username]} token not valid, creating new token."
273 elsif !File.exist?(tokenfile) || options[:"rotate-tokens"]
274 STDERR.puts "Account #{l[:username]} token file not found, creating new token."
278 aca_params = {owner_uuid: l[:user_uuid], api_client_id: 0}
279 if options[:"token-lifetime"] && options[:"token-lifetime"] > 0
280 aca_params.merge!(expires_at: (Time.now + options[:"token-lifetime"]))
282 user_token = logincluster_arv.api_client_authorization.create(api_client_authorization: aca_params)
283 File.open(tokenfile, 'w', 0600) do |f|
284 f.write("ARVADOS_API_HOST=#{ENV['ARVADOS_API_HOST']}\n")
285 f.write("ARVADOS_API_TOKEN=v2/#{user_token[:uuid]}/#{user_token[:api_token]}\n")
287 FileUtils.chown(username, user_gid, tokenfile)
290 STDERR.puts "Error setting token for #{l[:username]}: #{e}"
295 rescue Exception => bang
296 puts "Error: " + bang.to_s
297 puts bang.backtrace.join("\n")