Ansible

Collection of ansible roles and playbooks I have found to be useful.

Roles are tested on Debian Jessie.

Requires python package on remote host.

Credits

• Antti Jaakkola (Annttu)
• Joonas Järveläinen (jonttu)
• Veli-Matti Leppänen (velzi)

Modules

Ferm

Combined with ferm_service module, ferm provides easy to use firewall.

Variables

Currently none.

Ferm_service

This module opens ports to ferm-firewall. Useful when service requires open ports.

Usage

Add to role's meta/main.yml

 dependencies:
  - { role: ferm_service, name: someservice, chain: input, saddr: "source-ip-here", dport: someport, proto: tcp }

Variables

name	description	example
name	name for service	someservice
interface	Interface for incoming traffic	eth0
daddr	Destination address	10.0.0.1
saddr	Source address	10.0.0.0/24
dport	Destination port	5555
sport	source port	5555
proto	Protocol, tcp, udp, icmp	tcp
chain	Firewall chain, input, output, forward, input6, output6, forward6	input

virsh-console

Setup libvirt virtual to have getty on virtual serial console ttyS0.

ldap_users

Setup pam authentication against ldap and nscd and nslcd to use ldap.

Variables

name	description	example
ca_crt	Local path to ca file	/etc/ca.crt
ldap_ca	Remote path to ca file	/etc/ldap/ca.crt (default)
ldap_server	LDAP server(s) URI	ldaps://ldap.example.com
ldap_base	LDAP base dn	dc=example,dc=com
login_groups	List of groups allowed to login	sysadmin

fail2ban

Install and setup fail2ban.

Currently only ssh service is supported.

Variables

Example config

fail2ban:
  ignored_hosts:
     - 127.0.0.0/8
     - x.y.z.i/24
  bantime: 3600
  maxretry: 10
  destemail: root@localhost
  banaction: iptables-multiport

  services:
   - ssh:
     port: ssh
     logpath: /var/log/auth.log
     filter: sshd

nagios-nrpe

Install and configure nagios-nrpe service. Uses quite a dynamic plugin configuration via host_vars or group_vars.

Variables

name	type	description	example	required
server_port	int	Port where nrpe server listens	5666 ( default )	no
user_groups	list	Groups which nagios user should have	Debian-exim	no
plugins	list	a list of plugin entries	see below	yes
sudo_plugins	list	a list of plugin entries which requires sudo	see below	no

Plugin variables

name	type	description	default	example	required
name	string	Name of plugin, automatically prefixed with "check_"		disk	yes
path	string	partial or full path to plugin	/usr/lib/nagios/plugins/check_{{ name }}	/usr/lib/nagios/plugins/check_disk or disk	no
warning	string	warning limit		10%	no
critical	string	critical limit		20%	no
args	string	plugin arguments		-p /dev/sda1	no

Example config

nagios_nrpe:
 server_port: 5555
 allowed_hosts:
  - 10.0.0.1
 user_groups:
  - Debian-exim
 plugins:
  - name: users
    critical: 30
    warning: 10
  - name: mailq
    args: -M exim
    critical: 100
    warning: 10
 sudo_plugins:
  - name: apt
    args: -u -t 60

munin-node

Install and configure munin-node

variables

In munin block

name	type	description	default	example	required
master_address	ip-address	master ip-address without netmask		10.0.0.2	yes

Example usage

munin:
 master_address: 10.0.0.2

NTP

Install and configure a ntp server for host.

Variables

name	type	description	default	example	required
servers	list of servers	list of servers, see server variables	4 pool.ntp.org servers		no
peers	list of peers	list of peers, see server variables		no
restrict	list of restrictons	see restrict variables	allow local, deny others		no

ntp server variables

name	type	description	default	example	required
address	ip or hostname	peer or server address		10.0.0.1	yes
iburst	boolean	use iburst	false	false	no
burst	boolean	use iburst	false	false	no
true	boolean	Force the association to assume truechimer status	false	false	no
xleave	boolean	Operate in interleaved mode	false	false	no
key	string	key string	no		no
autokey	boolean	use autokey option	false	false	no
minpoll	int	minimum polling interval, in seconds as a power of two		10	no
maxpoll	int	maximum polling interval, in seconds as a power of two		20	no
mode	string	Pass option to a reference clock driver			no
noselect	boolean	only display peer/server but don't use	false	false	no
preempt	boolean	Preempt server/peer	false	false	no
ttl	int	ttl used in broadcast and anycast mode			no
version	string	specify allowed version			no

More information on:

man 5 ntp.conf

ntp restrict variables

name	type	description	default	example	required
address	ip or hostname	Client ip or hostname.		10.0.0.1	yes
mask	hostmask	Optional hostmask if ip is a network.		255.255.255.0	no
kod	boolean	send kiss of death packet to denied host.	false	true	no
noquery	boolean	Don't allow queries.	false	false	no
nomodify	boolean	Don't allow modifications.	false	false	no
notrap	boolean	Don't allow control message traps.	false	false	no
noserve	boolean	Don't provide time service.	false	false	no
nopeer	boolean	Provide stateless service but don't accept as peer.	false	false	no
notrust	boolean	Don't allow unauthenticated packages.	false	false	no
limited	boolean	see doc	false	false	no
ntpport	boolean	Accept only queries from port NTP port (123)	false	false	no
version	boolean	Ignore these hosts if not the current NTP version.	false	false	no
ignore	boolean	Ignore all packets from hosts.	false	false	no
lowpriotrap	boolean		false	false	no

More information in doc.ntp.org

Sudo

Install sudo package and provide per user or per app sudo permissions using dependencies.

example usage

Add to your role's meta/main.yml

dependencies:
 - { role: sudo, name: somename, user: someuser, command: "somecommand", nopasswd: true }

Variables

name	type	description	default	example	required
name	string	name for file		apt-dater-sudo	yes
user	string	username for sudo permission		someuser	yes
command	string	allow sudo only for this command		/usr/bin/apt-get	no
nopasswd	boolean	enable sudo without password	false	true	no

apt-dater-host

Install and configure remote for apt-dater. Uses separate apt-dater user for ssh.

Variables

Variables are prefixed with apt_dater_host.

name	type	description	default	example	required
username	string	name of the user in remote system	apt-dater	apt-dater	no
home	string	home dir path of the user	/var/lib/apt-dater	/home/apt-dater	no
ssh_key	string	public key for apt-dater		ssh-rsa AAA...	yes

example usage

In site.yml

- role apt-dater-host

in host_vars or group_vars

apt_dater_host:
 ssh_key: ssh-rsa AAAA...

network

Configure /etc/networking/interfaces etc.

Variables

name	type	description	default	example	required
interfaces	list	list of interfaces		see interface variables	yes
dns_servers	list	list of dns-server addresses			no
domain	string	Domain name			no

interface variables

name	type	description	default	example	required
interface	string	Interface name		eth0	yes
ip	ipv4 address	Interface IPv4 address		10.0.0.2	yes
mask	integer or hostmask	IPv4 address mask		24 or 255.255.255.0	yes
gateway	IPv4 address	gateway address		10.0.0.1	no
dhcp	boolean	Use dhcp to acquire address, if true ip, netmask and gateway are ignored	false	true	no
mtu	integer	Interface mtu			no
boardcast	ipv4 address	IPv4 broadcast address		10.0.0.255	no
boardcast	ipv4 address	IPv4 network address		10.0.0.0	no
auto6	ipv6 autoconf
ip6	ipv6 address	Interface IPv6 address		2001:DB8::10:2	no
mask6	integer	Interface IPv6 address mask	64	64	no
gateway6	ipv6 address	gateway IPv6 address	2001:DB8::1	no
accept_ra	boolean, integer	accept router advertisements	true, false, 0, 1 2	no
autoconf	boolean	IPv6 autoconf	true, false	no
privext	boolean, integer	Use IPv6 privacy extension (RFC3041)	true, false, 0, 1, 2	no

TODO

• lldpd
• munin master
• icinga ( master )
• icinga2

License

The MIT License (MIT)

Copyright (c) 2015 Antti Jaakkola

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.