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 #{$0} -- CHANGES WILL BE OVERWRITTEN #
45 #######################################################################################\n\n"
46 start_banner = "### BEGIN Arvados-managed keys -- changes between markers will be overwritten\n"
47 end_banner = "### END Arvados-managed keys -- changes between markers will be overwritten\n"
56 arv = Arvados.new({ :suppress_ssl_warnings => false })
57 logincluster_host = ENV['ARVADOS_API_HOST']
58 logincluster_name = arv.cluster_config['Login']['LoginCluster'] or ''
60 if logincluster_name != '' and logincluster_name != arv.cluster_config['ClusterID']
61 logincluster_host = arv.cluster_config['RemoteClusters'][logincluster_name]['Host']
63 logincluster_arv = Arvados.new({ :api_host => logincluster_host,
64 :suppress_ssl_warnings => false })
66 vm_uuid = ENV['ARVADOS_VIRTUAL_MACHINE_UUID']
68 logins = arv.virtual_machine.logins(:uuid => vm_uuid)[:items]
69 logins = [] if logins.nil?
70 logins = logins.reject { |l| l[:username].nil? or l[:hostname].nil? or l[:virtual_machine_uuid] != vm_uuid }
74 open("/etc/login.defs", encoding: "utf-8") do |login_defs|
75 login_defs.each_line do |line|
76 next unless match = /^UID_MIN\s+(\S+)$/.match(line)
77 if match[1].start_with?("0x")
79 elsif match[1].start_with?("0")
84 new_uid_min = match[1].to_i(base)
85 uid_min = new_uid_min if (new_uid_min > 0)
91 if not pwnam[l[:username]]
93 pwnam[l[:username]] = Etc.getpwnam(l[:username])
95 if options[:"skip-missing-users"]
96 STDERR.puts "Account #{l[:username]} not found. Skipping"
100 if pwnam[l[:username]].uid < uid_min
101 STDERR.puts "Account #{l[:username]} uid #{pwnam[l[:username]].uid} < uid_min #{uid_min}. Skipping" if debug
111 STDERR.puts("Considering #{l[:username]} ...") if debug
112 keys[l[:username]] = Array.new() if not keys.has_key?(l[:username])
115 # Handle putty-style ssh public keys
116 key.sub!(/^(Comment: "r[^\n]*\n)(.*)$/m,'ssh-rsa \2 \1')
117 key.sub!(/^(Comment: "d[^\n]*\n)(.*)$/m,'ssh-dss \2 \1')
121 keys[l[:username]].push(key) if not keys[l[:username]].include?(key)
127 current_user_groups = Hash.new
128 while (ent = Etc.getgrent()) do
129 ent.mem.each do |member|
130 current_user_groups[member] ||= Array.new
131 current_user_groups[member].push ent.name
137 next if seen[l[:username]]
138 seen[l[:username]] = true
140 username = l[:username]
142 unless pwnam[l[:username]]
143 STDERR.puts "Creating account #{l[:username]}"
145 out, st = Open3.capture2e("useradd", "-m",
149 if st.exitstatus != 0
150 STDERR.puts "Account creation failed for #{l[:username]}:\n#{out}"
154 pwnam[username] = Etc.getpwnam(username)
156 STDERR.puts "Created account but then getpwnam() failed for #{l[:username]}: #{e}"
161 user_gid = pwnam[username].gid
162 homedir = pwnam[l[:username]].dir
163 if !File.exist?(homedir)
164 STDERR.puts "Cannot set up user #{username} because their home directory #{homedir} does not exist. Skipping."
168 existing_groups = current_user_groups[username] || []
169 groups = l[:groups] || []
170 # Adding users to the FUSE group has long been hardcoded behavior.
173 groups.select! { |g| Etc.getgrnam(g) rescue false }
175 groups.each do |addgroup|
176 if existing_groups.index(addgroup).nil?
177 # User should be in group, but isn't, so add them.
178 STDERR.puts "Add user #{username} to #{addgroup} group"
179 out, st = Open3.capture2e("usermod", "-aG", addgroup, username)
180 if st.exitstatus != 0
181 STDERR.puts "Failed to add #{username} to #{addgroup} group:\n#{out}"
186 existing_groups.each do |removegroup|
187 if groups.index(removegroup).nil?
188 # User is in a group, but shouldn't be, so remove them.
189 STDERR.puts "Remove user #{username} from #{removegroup} group"
190 out, st = Open3.capture2e("gpasswd", "-d", username, removegroup)
191 if st.exitstatus != 0
192 STDERR.puts "Failed to remove user #{username} from #{removegroup} group:\n#{out}"
197 userdotssh = File.join(homedir, ".ssh")
198 ensure_dir(userdotssh, 0700, username, user_gid)
200 newkeys = "###\n###\n" + keys[l[:username]].join("\n") + "\n###\n###\n"
202 keysfile = File.join(userdotssh, "authorized_keys")
204 oldkeys = File.read(keysfile)
209 if options[:exclusive]
210 newkeys = exclusive_banner + newkeys
211 elsif oldkeys.start_with?(exclusive_banner)
212 newkeys = start_banner + newkeys + end_banner
213 elsif (m = /^(.*?\n|)#{start_banner}(.*?\n|)#{end_banner}(.*)/m.match(oldkeys))
214 newkeys = m[1] + start_banner + newkeys + end_banner + m[3]
216 newkeys = start_banner + newkeys + end_banner + oldkeys
219 if oldkeys != newkeys then
220 File.open(keysfile, 'w', 0600) do |f|
223 FileUtils.chown(username, user_gid, keysfile)
226 userdotconfig = File.join(homedir, ".config")
227 ensure_dir(userdotconfig, 0755, username, user_gid)
228 configarvados = File.join(userdotconfig, "arvados")
229 ensure_dir(configarvados, 0700, username, user_gid)
231 tokenfile = File.join(configarvados, "settings.conf")
234 STDERR.puts "Processing #{tokenfile} ..." if debug
236 if File.exist?(tokenfile)
237 # check if the token is still valid
238 myToken = ENV["ARVADOS_API_TOKEN"]
239 userEnv = File.read(tokenfile)
240 if (m = /^ARVADOS_API_TOKEN=(.*?\n)/m.match(userEnv))
242 tmp_arv = Arvados.new({ :api_host => logincluster_host,
243 :api_token => (m[1]),
244 :suppress_ssl_warnings => false })
246 rescue Arvados::TransactionFailedError => e
247 if e.to_s =~ /401 Unauthorized/
248 STDERR.puts "Account #{l[:username]} token not valid, creating new token."
255 elsif !File.exist?(tokenfile) || options[:"rotate-tokens"]
256 STDERR.puts "Account #{l[:username]} token file not found, creating new token."
260 aca_params = {owner_uuid: l[:user_uuid], api_client_id: 0}
261 if options[:"token-lifetime"] && options[:"token-lifetime"] > 0
262 aca_params.merge!(expires_at: (Time.now + options[:"token-lifetime"]))
264 user_token = logincluster_arv.api_client_authorization.create(api_client_authorization: aca_params)
265 File.open(tokenfile, 'w', 0600) do |f|
266 f.write("ARVADOS_API_HOST=#{ENV['ARVADOS_API_HOST']}\n")
267 f.write("ARVADOS_API_TOKEN=v2/#{user_token[:uuid]}/#{user_token[:api_token]}\n")
269 FileUtils.chown(username, user_gid, tokenfile)
272 STDERR.puts "Error setting token for #{l[:username]}: #{e}"
276 rescue Exception => bang
277 puts "Error: " + bang.to_s
278 puts bang.backtrace.join("\n")