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Diffstat (limited to 'lib/leap_cli/commands/compile.rb')
| -rw-r--r-- | lib/leap_cli/commands/compile.rb | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/lib/leap_cli/commands/compile.rb b/lib/leap_cli/commands/compile.rb new file mode 100644 index 00000000..f9079279 --- /dev/null +++ b/lib/leap_cli/commands/compile.rb @@ -0,0 +1,531 @@ +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
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