Puppet Class: tripleo::firewall

Defined in:
manifests/firewall.pp

Overview

Copyright © 2015 eNovance SAS <licensing@enovance.com>

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Class: tripleo

Configure the TripleO firewall

Parameters:

manage_firewall

(optional) Completely enable or disable firewall settings (false means disabled, and true means enabled) Defaults to false

firewall_chains

(optional) Manage firewall chains Default to {}

firewall_rules

(optional) Allow to add custom firewall rules Should be an hash. Default to {}

purge_firewall_chains

(optional) Boolean, purge all firewalli rules in a given chain Defaults to false

purge_firewall_rules

(optional) Boolean, purge all firewall resources Defaults to false

firewall_pre_extras

(optional) Allow to add custom parameters to firewall rules (pre stage) Should be an hash. Default to {}

firewall_post_extras

(optional) Allow to add custom parameters to firewall rules (post stage) Should be an hash. Default to {}

Parameters:

  • manage_firewall (Any) (defaults to: false)
  • firewall_chains (Any) (defaults to: {})
  • firewall_rules (Any) (defaults to: {})
  • purge_firewall_chains (Any) (defaults to: false)
  • purge_firewall_rules (Any) (defaults to: false)
  • firewall_pre_extras (Any) (defaults to: {})
  • firewall_post_extras (Any) (defaults to: {}) 


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# File 'manifests/firewall.pp', line 54

class tripleo::firewall(
  $manage_firewall       = false,
  $firewall_chains       = {},
  $firewall_rules        = {},
  $purge_firewall_chains = false,
  $purge_firewall_rules  = false,
  $firewall_pre_extras   = {},
  $firewall_post_extras  = {},
) {

  if $manage_firewall {

    if $purge_firewall_chains {
      resources { 'firewallchain':
        purge => true
      }
    }

    # Only purges IPv4 rules
    if $purge_firewall_rules {
      resources { 'firewall':
        purge => true
      }
    }

    # To manage the chains they must be named in specific ways
    # https://github.com/puppetlabs/puppetlabs-firewall#type-firewallchain
    # Example Hiera:
    # tripleo::firewall::firewall_chains:
    #   'FORWARD:filter:IPv4':
    #     ensure: present
    #     policy: accept
    #     purge: false
    #
    create_resources('firewallchain', $firewall_chains)

    # anyone can add your own rules
    # example with Hiera:
    #
    # tripleo::firewall::firewall_rules:
    #   '300 allow custom application 1':
    #     port: 999
    #     proto: udp
    #     action: accept
    #   '301 allow custom application 2':
    #     port: 8081
    #     proto: tcp
    #     action: accept
    #
    create_resources('tripleo::firewall::rule', $firewall_rules)

    ensure_resource('class', 'tripleo::firewall::pre', {
      'firewall_settings' => $firewall_pre_extras,
    })

    ensure_resource('class', 'tripleo::firewall::post', {
      'firewall_settings' => $firewall_post_extras,
    })

    # Ensure we don't get any unmanaged rules in the firewall.
    #
    # iptables-services package pushes some rules we don't want to see in the
    # firewall, as they conflict with the ones we are actually managing:
    # - opens ssh to the world (see https://review.openstack.org/632468)
    # - reject connections (and this reject happens before the logging we push,
    #   preventing logging to happen)
    # - some repetitions like RELATED,ESTABLISHED, and ICMP related rules
    #
    # See https://bugzilla.redhat.com/show_bug.cgi?id=1667887
    # for more context and detail.
    exec {'save ipv4 rules':
      command => '/usr/sbin/iptables-save > /etc/sysconfig/iptables',
      before  => Service[$::firewall::params::service_name, $::firewall::params::service_name_v6],
    }
    exec {'save ipv6 rules':
      command => '/usr/sbin/ip6tables-save > /etc/sysconfig/ip6tables',
      before  => Service[$::firewall::params::service_name, $::firewall::params::service_name_v6],
    }

    Class['tripleo::firewall::pre']
      -> Firewall<|tag == 'tripleo-firewall-rule'|>
        -> Class['tripleo::firewall::post']

    Service<||> -> Class['tripleo::firewall::post']

    # Allow composable services to load their own custom
    # example with Hiera.
    # NOTE(dprince): In the future when we have a better hiera
    # heat hook we might refactor this to use hiera's merging
    # capabilities instead. Until then rolling up the flat service
    # keys and dynamically creating firewall rules for each service
    # will allow us to compose and should work fine.
    #
    # Each service can load its rules by using this form:
    #
    # tripleo.<service name with underscores>.firewall_rules:
    #   '300 allow custom application 1':
    #     dport: 999
    #     proto: udp
    #     action: accept
    $service_names = hiera('service_names', [])
    tripleo::firewall::service_rules { $service_names: }


    # puppetlabs-firewall only manages the current state of iptables
    # rules and writes out the rules to a file to ensure they are
    # persisted. We are specifically running the following commands after the
    # iptables rules to ensure the persisted file does not contain any
    # ephemeral neutron rules. Neutron assumes the iptables rules are not
    # persisted so it may cause an issue if the rule is loaded on boot
    # (or via iptables restart). If an operator needs to reload iptables
    # for any reason, they may need to manually reload the appropriate
    # neutron agent to restore these iptables rules.
    # https://bugzilla.redhat.com/show_bug.cgi?id=1541528
    exec { 'nonpersistent_v4_rules_cleanup':
      command => '/bin/sed -i /neutron-/d /etc/sysconfig/iptables',
      onlyif  => '/bin/test -f /etc/sysconfig/iptables && /bin/grep -q neutron- /etc/sysconfig/iptables',
    }
    exec { 'nonpersistent_v6_rules_cleanup':
      command => '/bin/sed -i /neutron-/d /etc/sysconfig/ip6tables',
      onlyif  => '/bin/test -f /etc/sysconfig/ip6tables && /bin/grep -q neutron- /etc/sysconfig/ip6tables',
    }

    # Do not persist ephemeral firewall rules mananged by ironic-inspector
    # pxe_filter 'iptables' driver.
    # https://bugs.launchpad.net/tripleo/+bug/1765700
    # https://storyboard.openstack.org/#!/story/2001890
    exec { 'nonpersistent_ironic_inspector_pxe_filter_v4_rules_cleanup':
      command => '/bin/sed -i "/-m comment --comment.*ironic-inspector/p;/ironic-inspector/d" /etc/sysconfig/iptables',
      onlyif  => [
          '/bin/test -f /etc/sysconfig/iptables',
          '/bin/grep -v "\-m comment \--comment" /etc/sysconfig/iptables | /bin/grep -q ironic-inspector'
      ]
    }
    exec { 'nonpersistent_ironic_inspector_pxe_filter_v6_rules_cleanup':
      command => '/bin/sed -i "/-m comment --comment.*ironic-inspector/p;/ironic-inspector/d" /etc/sysconfig/ip6tables',
      onlyif  => [
          '/bin/test -f /etc/sysconfig/ip6tables',
          '/bin/grep -v "\-m comment \--comment" /etc/sysconfig/ip6tables | /bin/grep -q ironic-inspector'
      ]
    }

    Exec['save ipv4 rules'] -> Firewall<| |>
    Exec['save ipv6 rules'] -> Firewall<| |>
    Firewall<| |> -> Exec['nonpersistent_v4_rules_cleanup']
    Firewall<| |> -> Exec['nonpersistent_v6_rules_cleanup']
    Firewall<| |> -> Exec['nonpersistent_ironic_inspector_pxe_filter_v4_rules_cleanup']
    Firewall<| |> -> Exec['nonpersistent_ironic_inspector_pxe_filter_v6_rules_cleanup']
  }
}