2 # Copyright (C) The Arvados Authors. All rights reserved.
4 # SPDX-License-Identifier: AGPL-3.0
15 req_envs = %w(ARVADOS_API_HOST ARVADOS_API_TOKEN ARVADOS_VIRTUAL_MACHINE_UUID)
18 abort "Fatal: These environment vars must be set: #{req_envs}"
23 OptionParser.new do |parser|
24 parser.on('--exclusive', 'Manage SSH keys file exclusively.')
25 parser.on('--rotate-tokens', 'Force a rotation of all user tokens.')
26 parser.on('--skip-missing-users', "Don't try to create any local accounts.")
27 parser.on('--token-lifetime SECONDS', 'Create user tokens that expire after SECONDS.', Integer)
28 parser.on('--debug', 'Enable debug output')
29 end.parse!(into: options)
31 exclusive_banner = "#######################################################################################
32 # THIS FILE IS MANAGED BY #{$0} -- CHANGES WILL BE OVERWRITTEN #
33 #######################################################################################\n\n"
34 start_banner = "### BEGIN Arvados-managed keys -- changes between markers will be overwritten\n"
35 end_banner = "### END Arvados-managed keys -- changes between markers will be overwritten\n"
44 arv = Arvados.new({ :suppress_ssl_warnings => false })
45 logincluster_host = ENV['ARVADOS_API_HOST']
46 logincluster_name = arv.cluster_config['Login']['LoginCluster'] or ''
48 if logincluster_name != '' and logincluster_name != arv.cluster_config['ClusterID']
49 logincluster_host = arv.cluster_config['RemoteClusters'][logincluster_name]['Host']
51 logincluster_arv = Arvados.new({ :api_host => logincluster_host,
52 :suppress_ssl_warnings => false })
54 vm_uuid = ENV['ARVADOS_VIRTUAL_MACHINE_UUID']
56 logins = arv.virtual_machine.logins(:uuid => vm_uuid)[:items]
57 logins = [] if logins.nil?
58 logins = logins.reject { |l| l[:username].nil? or l[:hostname].nil? or l[:virtual_machine_uuid] != vm_uuid }
62 open("/etc/login.defs", encoding: "utf-8") do |login_defs|
63 login_defs.each_line do |line|
64 next unless match = /^UID_MIN\s+(\S+)$/.match(line)
65 if match[1].start_with?("0x")
67 elsif match[1].start_with?("0")
72 new_uid_min = match[1].to_i(base)
73 uid_min = new_uid_min if (new_uid_min > 0)
79 if not pwnam[l[:username]]
81 pwnam[l[:username]] = Etc.getpwnam(l[:username])
83 if options[:"skip-missing-users"]
84 STDERR.puts "Account #{l[:username]} not found. Skipping"
88 if pwnam[l[:username]].uid < uid_min
89 STDERR.puts "Account #{l[:username]} uid #{pwnam[l[:username]].uid} < uid_min #{uid_min}. Skipping" if debug
99 STDERR.puts("Considering #{l[:username]} ...") if debug
100 keys[l[:username]] = Array.new() if not keys.has_key?(l[:username])
103 # Handle putty-style ssh public keys
104 key.sub!(/^(Comment: "r[^\n]*\n)(.*)$/m,'ssh-rsa \2 \1')
105 key.sub!(/^(Comment: "d[^\n]*\n)(.*)$/m,'ssh-dss \2 \1')
109 keys[l[:username]].push(key) if not keys[l[:username]].include?(key)
115 current_user_groups = Hash.new
116 while (ent = Etc.getgrent()) do
117 ent.mem.each do |member|
118 current_user_groups[member] ||= Array.new
119 current_user_groups[member].push ent.name
125 next if seen[l[:username]]
126 seen[l[:username]] = true
128 username = l[:username]
130 unless pwnam[l[:username]]
131 STDERR.puts "Creating account #{l[:username]}"
133 out, st = Open3.capture2e("useradd", "-m",
137 if st.exitstatus != 0
138 STDERR.puts "Account creation failed for #{l[:username]}:\n#{out}"
142 pwnam[username] = Etc.getpwnam(username)
144 STDERR.puts "Created account but then getpwnam() failed for #{l[:username]}: #{e}"
149 existing_groups = current_user_groups[username] || []
150 groups = l[:groups] || []
151 # Adding users to the FUSE group has long been hardcoded behavior.
154 groups.select! { |g| Etc.getgrnam(g) rescue false }
156 groups.each do |addgroup|
157 if existing_groups.index(addgroup).nil?
158 # User should be in group, but isn't, so add them.
159 STDERR.puts "Add user #{username} to #{addgroup} group"
160 out, st = Open3.capture2e("usermod", "-aG", addgroup, username)
161 if st.exitstatus != 0
162 STDERR.puts "Failed to add #{username} to #{addgroup} group:\n#{out}"
167 existing_groups.each do |removegroup|
168 if groups.index(removegroup).nil?
169 # User is in a group, but shouldn't be, so remove them.
170 STDERR.puts "Remove user #{username} from #{removegroup} group"
171 out, st = Open3.capture2e("gpasswd", "-d", username, removegroup)
172 if st.exitstatus != 0
173 STDERR.puts "Failed to remove user #{username} from #{removegroup} group:\n#{out}"
178 homedir = pwnam[l[:username]].dir
179 userdotssh = File.join(homedir, ".ssh")
180 Dir.mkdir(userdotssh) if !File.exist?(userdotssh)
182 newkeys = "###\n###\n" + keys[l[:username]].join("\n") + "\n###\n###\n"
184 keysfile = File.join(userdotssh, "authorized_keys")
186 if File.exist?(keysfile)
187 oldkeys = IO::read(keysfile)
192 if options[:exclusive]
193 newkeys = exclusive_banner + newkeys
194 elsif oldkeys.start_with?(exclusive_banner)
195 newkeys = start_banner + newkeys + end_banner
196 elsif (m = /^(.*?\n|)#{start_banner}(.*?\n|)#{end_banner}(.*)/m.match(oldkeys))
197 newkeys = m[1] + start_banner + newkeys + end_banner + m[3]
199 newkeys = start_banner + newkeys + end_banner + oldkeys
202 if oldkeys != newkeys then
203 f = File.new(keysfile, 'w')
208 userdotconfig = File.join(homedir, ".config")
209 if !File.exist?(userdotconfig)
210 Dir.mkdir(userdotconfig)
213 configarvados = File.join(userdotconfig, "arvados")
214 Dir.mkdir(configarvados) if !File.exist?(configarvados)
216 tokenfile = File.join(configarvados, "settings.conf")
219 STDERR.puts "Processing #{tokenfile} ..." if debug
221 if File.exist?(tokenfile)
222 # check if the token is still valid
223 myToken = ENV["ARVADOS_API_TOKEN"]
224 userEnv = IO::read(tokenfile)
225 if (m = /^ARVADOS_API_TOKEN=(.*?\n)/m.match(userEnv))
227 tmp_arv = Arvados.new({ :api_host => logincluster_host,
228 :api_token => (m[1]),
229 :suppress_ssl_warnings => false })
231 rescue Arvados::TransactionFailedError => e
232 if e.to_s =~ /401 Unauthorized/
233 STDERR.puts "Account #{l[:username]} token not valid, creating new token."
240 elsif !File.exist?(tokenfile) || options[:"rotate-tokens"]
241 STDERR.puts "Account #{l[:username]} token file not found, creating new token."
245 aca_params = {owner_uuid: l[:user_uuid], api_client_id: 0}
246 if options[:"token-lifetime"] && options[:"token-lifetime"] > 0
247 aca_params.merge!(expires_at: (Time.now + options[:"token-lifetime"]))
249 user_token = logincluster_arv.api_client_authorization.create(api_client_authorization: aca_params)
250 f = File.new(tokenfile, 'w')
251 f.write("ARVADOS_API_HOST=#{ENV['ARVADOS_API_HOST']}\n")
252 f.write("ARVADOS_API_TOKEN=v2/#{user_token[:uuid]}/#{user_token[:api_token]}\n")
256 STDERR.puts "Error setting token for #{l[:username]}: #{e}"
259 FileUtils.chown_R(l[:username], nil, userdotssh)
260 FileUtils.chown_R(l[:username], nil, userdotconfig)
261 File.chmod(0700, userdotssh)
262 File.chmod(0700, userdotconfig)
263 File.chmod(0700, configarvados)
264 File.chmod(0750, homedir)
265 File.chmod(0600, keysfile)
266 if File.exist?(tokenfile)
267 File.chmod(0600, tokenfile)
271 rescue Exception => bang
272 puts "Error: " + bang.to_s
273 puts bang.backtrace.join("\n")