require 'socket' module LeapCli module Commands desc "Compile generated files." command [:compile, :c] do |c| c.desc 'Compiles node configuration files into hiera files used for deployment.' c.arg_name 'ENVIRONMENT', :optional => true c.command :all do |all| all.action do |global_options,options,args| environment = args.first compile_command(environment) end end c.desc "Prints a DNS zone file for your provider." c.command :zone do |zone| zone.action do |global_options, options, args| compile_command(nil) compile_zone_file(global_options[:yes] || global_options[:force]) end end c.desc "Print entries suitable for an /etc/hosts file, useful for testing your provider." c.command :hosts do |hosts| hosts.action do |global_options, options, args| compile_command(nil) compile_hosts_file end end c.desc "Compile provider.json bootstrap files for your provider." c.command 'provider.json' do |provider| provider.action do |global_options, options, args| compile_command(nil) compile_provider_json end end c.desc "Prints a list of firewall rules. These rules are already "+ "implemented on each node, but you might want the list of all "+ "rules in case you also have a restrictive network firewall." c.command :firewall do |zone| zone.action do |global_options, options, args| compile_command(nil) compile_firewall end end c.default_command :all end protected def compile_command(environment) if !LeapCli.leapfile.environment.nil? && !environment.nil? && environment != LeapCli.leapfile.environment bail! "You cannot specify an ENVIRONMENT argument while the environment is pinned." end if environment if manager.environment_names.include?(environment) compile_hiera_files(manager.filter([environment]), false) else bail! "There is no environment named `#{environment}`." end else clean_export = LeapCli.leapfile.environment.nil? compile_hiera_files(manager.filter, clean_export) end if file_exists?(:static_web_readme) compile_provider_json(environment) end end # # a "clean" export of secrets will also remove keys that are no longer used, # but this should not be done if we are not examining all possible nodes. # def compile_hiera_files(nodes, clean_export) update_certificates(nodes) # \ must come first so that output will update_compiled_ssh_configs # / get included in compiled hiera files. sanity_check(nodes) manager.export_nodes(nodes) manager.export_secrets(clean_export) end def update_compiled_ssh_configs generate_monitor_ssh_keys update_authorized_keys update_known_hosts end def sanity_check(nodes) # confirm that every node has a unique ip address ips = {} nodes.pick_fields('ip_address').each do |name, ip_address| if ips.key?(ip_address) bail! { log(:fatal_error, "Every node must have its own IP address.") { log "Nodes `#{name}` and `#{ips[ip_address]}` are both configured with `#{ip_address}`." } } else ips[ip_address] = name end end # confirm that the IP address of this machine is not also used for a node. Socket.ip_address_list.each do |addrinfo| if !addrinfo.ipv4_private? && ips.key?(addrinfo.ip_address) ip = addrinfo.ip_address name = ips[ip] bail! { log(:fatal_error, "Something is very wrong. The `leap` command must only be run on your sysadmin machine, not on a provider node.") { log "This machine has the same IP address (#{ip}) as node `#{name}`." } } end end end ## ## SSH ## # # generates a ssh key pair that is used only by remote monitors # to connect to nodes and run certain allowed commands. # # every node has the public monitor key added to their authorized # keys, and every monitor node has a copy of the private monitor key. # def generate_monitor_ssh_keys priv_key_file = path(:monitor_priv_key) pub_key_file = path(:monitor_pub_key) unless file_exists?(priv_key_file, pub_key_file) ensure_dir(File.dirname(priv_key_file)) ensure_dir(File.dirname(pub_key_file)) cmd = %(ssh-keygen -N '' -C 'monitor' -t rsa -b 4096 -f '%s') % priv_key_file assert_run! cmd if file_exists?(priv_key_file, pub_key_file) log :created, priv_key_file log :created, pub_key_file else log :failed, 'to create monitor ssh keys' end end end # # Compiles the authorized keys file, which gets installed on every during init. # Afterwards, puppet installs an authorized keys file that is generated differently # (see authorized_keys() in macros.rb) # def update_authorized_keys buffer = StringIO.new keys = Dir.glob(path([:user_ssh, '*'])) if keys.empty? bail! "You must have at least one public SSH user key configured in order to proceed. See `leap help add-user`." end if file_exists?(path(:monitor_pub_key)) keys << path(:monitor_pub_key) end keys.sort.each do |keyfile| ssh_type, ssh_key = File.read(keyfile).strip.split(" ") buffer << ssh_type buffer << " " buffer << ssh_key buffer << " " buffer << Path.relative_path(keyfile) buffer << "\n" end write_file!(:authorized_keys, buffer.string) end # # generates the known_hosts file. # # we do a 'late' binding on the hostnames and ip part of the ssh pub key record in order to allow # for the possibility that the hostnames or ip has changed in the node configuration. # def update_known_hosts buffer = StringIO.new buffer << "#\n" buffer << "# This file is automatically generated by the command `leap`. You should NOT modify this file.\n" buffer << "# Instead, rerun `leap node init` on whatever node is causing SSH problems.\n" buffer << "#\n" manager.nodes.keys.sort.each do |node_name| node = manager.nodes[node_name] hostnames = [node.name, node.domain.internal, node.domain.full, node.ip_address].join(',') pub_key = read_file([:node_ssh_pub_key,node.name]) if pub_key buffer << [hostnames, pub_key].join(' ') buffer << "\n" end end write_file!(:known_hosts, buffer.string) end ## ## provider.json ## # # generates static provider.json files that can put into place # (e.g. https://domain/provider.json) for the cases where the # webapp domain does not match the provider's domain. # def compile_provider_json(environments=nil) webapp_nodes = manager.nodes[:services => 'webapp'] write_file!(:static_web_readme, STATIC_WEB_README) environments ||= manager.environment_names environments.each do |env| node = webapp_nodes[:environment => env].values.first if node env ||= 'default' write_file!( [:static_web_provider_json, env], node['definition_files']['provider'] ) write_file!( [:static_web_htaccess, env], HTACCESS_FILE % {:min_version => manager.env(env).provider.client_version['min']} ) end end end HTACCESS_FILE = %[ <Files provider.json> Header set X-Minimum-Client-Version %{min_version} </Files> ] STATIC_WEB_README = %[ This directory contains statically rendered copies of the `provider.json` file used by the client to "bootstrap" configure itself for use with your service provider. There is a separate provider.json file for each environment, although you should only need 'production/provider.json' or, if you have no environments configured, 'default/provider.json'. To clarify, this is the public `provider.json` file used by the client, not the `provider.json` file that is used to configure the provider. The provider.json file must be available at `https://domain/provider.json` (unless this provider is included in the list of providers which are pre- seeded in client). This provider.json file can be served correctly in one of three ways: (1) If the property webapp.domain is not configured, then the web app will be installed at https://domain/ and it will handle serving the provider.json file. (2) If one or more nodes have the 'static' service configured for the provider's domain, then these 'static' nodes will correctly serve provider.json. (3) Otherwise, you must copy the provider.json file to your web server and make it available at '/provider.json'. The example htaccess file shows what header options should be sent by the web server with the response. This directory is needed for method (3), but not for methods (1) or (2). This directory has been created by the command `leap compile provider.json`. Once created, it will be kept up to date everytime you compile. You may safely remove this directory if you don't use it. ] ## ## ## ZONE FILE ## def relative_hostname(fqdn, provider) @domain_regexp ||= /\.?#{Regexp.escape(provider.domain)}$/ fqdn.sub(@domain_regexp, '') end # # serial is any number less than 2^32 (4294967296) # def compile_zone_file(force=false) # note: we use the default provider for all nodes, because we use it # to generate hostnames that are relative to the default domain. provider = manager.env('default').provider hosts_seen = {} lines = [] # # header # lines << ZONE_HEADER % { :domain => provider.domain, :ns => provider.domain, :contact => provider.contacts.default.first.sub('@','.'), :serial => generate_zone_serial } # # common records # lines << ORIGIN_HEADER # 'A' records for primary domain manager.nodes[:environment => '!local'].each_node do |node| if node.dns['aliases'] && node.dns.aliases.include?(provider.domain) lines << ["@", "IN A #{node.ip_address}"] end end # NS records if provider['dns'] && provider.dns['nameservers'] unless provider.dns.nameservers.is_a?(Array) # TODO: remove me once we have JSON schema working bail! {log :error, 'dns.nameservers must be an array' } end provider.dns.nameservers.each do |ns| lines << ["@", "IN NS #{ns}."] end elsif !force log :warning, "Property dns.nameservers is not configured in provider.json." do log "This will produce a zone file without any NS records." log "Use --force to skip this warning." end return unless agree("Continue? ") end # environment records manager.environment_names.each do |env| next if env == 'local' nodes = manager.nodes[:environment => env] next unless nodes.any? spf = nil dkim = nil lines << ENV_HEADER % (env.nil? ? 'default' : env) nodes.each_node do |node| if node.dns.public lines << [relative_hostname(node.domain.full, provider), "IN A #{node.ip_address}"] end if node.dns['aliases'] node.dns.aliases.each do |host_alias| if host_alias != node.domain.full && host_alias != provider.domain lines << [relative_hostname(host_alias, provider), "IN A #{node.ip_address}"] end end end if node.services.include? 'mx' mx_domain = relative_hostname(node.domain.full_suffix, provider) lines << [mx_domain, "IN MX 10 #{relative_hostname(node.domain.full, provider)}"] spf ||= [mx_domain, spf_record(node)] dkim ||= dkim_record(node, provider) end end lines << spf if spf lines << dkim if dkim end # print the lines max_width = lines.inject(0) {|max, line| line.is_a?(Array) ? [max, line[0].length].max : max} max_width = [max_width, 24].min lines.each do |host, line| if line.nil? puts(host) else host = '@' if host == '' puts("%-#{max_width}s %s" % [host, line]) end end end # # outputs entries suitable for an /etc/hosts file # def compile_hosts_file manager.environment_names.each do |env| nodes = manager.nodes[:environment => env] next unless nodes.any? puts puts "## environment '#{env || 'default'}'" nodes.each do |name, node| puts "%s %s" % [ node.ip_address, [name, node.get('domain.full'), node.get('dns.aliases')].compact.join(' ') ] end end end private # # allow mail from any mx node, plus the webapp nodes. # # TODO: ipv6 # def spf_record(node) ips = node.nodes_like_me['services' => 'webapp'].values.collect {|n| "ip4:" + n.ip_address } # TXT strings may not be longer than 255 characters, although # you can chain multiple strings together. strings = "v=spf1 MX #{ips.join(' ')} -all".scan(/.{1,255}/).join('" "') %(IN TXT "#{strings}") end # # for example: # # selector._domainkey IN TXT "v=DKIM1;h=sha256;k=rsa;s=email;p=MIGfMA0GCSq...GSIb3DQ" # # specification: http://dkim.org/specs/rfc4871-dkimbase.html#rfc.section.7.4 # def dkim_record(node, provider) # PEM encoded public key (base64), without the ---PUBLIC KEY--- armor parts. assert_files_exist! :dkim_pub_key dkim_pub_key = Path.named_path(:dkim_pub_key) public_key = File.readlines(dkim_pub_key).grep(/^[^\-]+/).join host = relative_hostname( node.mx.dkim.selector + "._domainkey." + node.domain.full_suffix, provider) attrs = [ "v=DKIM1", "h=sha256", "k=rsa", "s=email", "p=" + public_key ] return [host, "IN TXT " + txt_wrap(attrs.join(';'))] end # # DNS TXT records cannot be longer than 255 characters. # # However, multiple responses will be concatenated together. # It looks like this: # # IN TXT "v=spf1 .... first" "second string..." # def txt_wrap(str) '"' + str.scan(/.{1,255}/).join('" "') + '"' end # # For zone serial number, we want something that will be # different each time you deploy but also will be greater # than any prior likely serial that was prefixed by the # year, such as 2016040600. # # so, we use time_t of right now, modified with first # digit incremented by one. # # this will work until Time.at(2**32 - 1_000_000_000) # aka 2074-05-31 04:41:36 UTC. # def generate_zone_serial Time.now.utc.to_i + 1_000_000_000 end ENV_HEADER = %[ ;; ;; ENVIRONMENT %s ;; ] ZONE_HEADER = %[ ;; ;; BIND data file for %{domain} ;; $TTL 600 $ORIGIN %{domain}. @ IN SOA %{ns}. %{contact}. ( %{serial} ; serial 7200 ; refresh ( 24 hours) 3600 ; retry ( 2 hours) 1209600 ; expire (1000 hours) 600 ) ; minimum ( 2 days) ; ] ORIGIN_HEADER = %[ ;; ;; ZONE ORIGIN ;; ] ## ## FIREWALL ## public def compile_firewall manager.nodes.each_node(&:evaluate) rules = [["ALLOW TO", "PORTS", "ALLOW FROM"]] manager.nodes[:environment => '!local'].values.each do |node| next unless node['firewall'] node.firewall.each do |name, rule| if rule.is_a? Hash rules << add_rule(rule) elsif rule.is_a? Array rule.each do |r| rules << add_rule(r) end end end end max_to = rules.inject(0) {|max, r| [max, r[0].length].max} max_port = rules.inject(0) {|max, r| [max, r[1].length].max} max_from = rules.inject(0) {|max, r| [max, r[2].length].max} rules.each do |rule| puts "%-#{max_to}s %-#{max_port}s %-#{max_from}s" % rule end end private def add_rule(rule) [rule["to"], [rule["port"]].compact.join(','), rule["from"]] end end end