Ansible eht1 ipv4 address in j2 template - ansible

Question

I'm currently working on a school assignment where i have to configure HAProxy to loadbalance between my two webservers.
I'm deploying the machines via Vagrant in Virtualbox. After this, my Ansible playbook will run and starts off with configuring the webservers. After the webservers are done, it will configure the loadbalancer.
Sadly, i can't manage to get the ipv4 address of both eth1 adapters added to the HAproxy.conf. I'm repeatedly getting the message that ansible can't find the variable inside the hostvars.
TASK [Configuring haproxy]
fatal: [HDVLD-TEST-LB01]: FAILED! => {"changed": false, "msg":
"AnsibleUndefinedVariable: 'ansible.vars.hostvars.HostVarsVars object'
has no attribute 'ansible_eth1'"}
Adding up to this, HAProxy is not responding on 10.2.2.20:8080 -> Chrome gives me an
ERR_CONNECTION_REFUSED
I hope someone over here can help me out..
I'll paste my code down here.
Vagrantfile
# -*- mode: ruby -*-
# vi: set ft=ruby :
# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure("2") do |config|
# config.ssh.insert_key = false
#webserver
(1..2).each do |i|
config.vm.define "HDVLD-TEST-WEB0#{i}" do |webserver|
webserver.vm.box = "ubuntu/trusty64"
webserver.vm.hostname = "HDVLD-TEST-WEB0#{i}"
webserver.vm.network :private_network, ip: "10.2.2.1#{i}"
webserver.vm.provider :virtualbox do |vb|
vb.memory = "524"
vb.customize ["modifyvm", :id, "--nested-hw-virt", "on"]
end
webserver.vm.provision "shell" do |shell|
ssh_pub_key = File.readlines("#{Dir.home}/.ssh/id_rsa.pub")
shell.inline = <<-SHELL
echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
echo #{ssh_pub_key} >> /root/.ssh/authorized_keys
SHELL
end
end
# config.vm.define "HDVLD-TEST-DB01" do|db_server|
# db_server.vm.box = "ubuntu/trusty64"
# db_server.vm.hostname = "HDVLD-TEST-DB01"
# db_server.vm.network :private_network, ip: "10.2.2.30"
# end
config.vm.define "HDVLD-TEST-LB01" do |lb_server|
lb_server.vm.box = "ubuntu/trusty64"
lb_server.vm.hostname = "HDVLD-TEST-LB01"
lb_server.vm.network :private_network, ip: "10.2.2.20"
lb_server.vm.provider :virtualbox do |vb|
vb.memory = "524"
vb.customize ["modifyvm", :id, "--nested-hw-virt", "on"]
end
lb_server.vm.provision "shell" do |shell|
ssh_pub_key = File.readlines("#{Dir.home}/.ssh/id_rsa.pub")
shell.inline = <<-SHELL
echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
echo #{ssh_pub_key} >> /root/.ssh/authorized_keys
SHELL
end
end
config.vm.provision :ansible do |ansible|
ansible.playbook = "webserver_test.yml"
ansible.groups = {
"webservers" => ["HDVLD-TEST-WEB01", "HDVLD-TEST-WEB02"],
"loadbalancer" => ["HDVLD-TEST-LB01"]
}
end
end
end
Playbook.yml
- hosts: webservers
become: true
vars_files: vars/default.yml
gather_facts: True
tasks:
# Getting the IP address of eth0 interface
- name: Gather facts from new server
delegate_facts: True
setup:
filter: ansible_eth1.ipv4.address
- name: Debug facts from Server
delegate_facts: True
debug:
var: ansible_eth1.ipv4.address
- name: UPurge
apt: purge=yes
- name: Install latest version of Apache
apt: name=apache2 update_cache=yes state=latest
- name: Install latest version of Facter
apt: name=facter state=latest
- name: Create document root for your domain
file:
path: /var/www/{{ http_host }}
state: directory
mode: '0755'
- name: Copy your index page
template:
src: "files/index.html.j2"
dest: "/var/www/{{ http_host }}/index.html"
- name: Set up virtuahHost
template:
src: "files/apache.conf.j2"
dest: "/etc/apache2/sites-available/{{ http_conf }}"
notify: restart-apache
- name: Enable new site {{ http_host }}
command: a2ensite {{ http_host }}
- name: Disable default site
command: a2dissite 000-default
when: disable_default
notify: restart-apache
- name: "UFW firewall allow HTTP on port {{ http_port }}"
ufw:
rule: allow
port: "{{ http_port }}"
proto: tcp
handlers:
- name: restart-apache
service:
name: apache2
state: restarted
- hosts: loadbalancer
become: true
vars_files: vars/default.yml
gather_facts: true
tasks:
- name: "Installing haproxy"
package:
name: "haproxy"
state: present
- name: "Starting haproxy"
service:
name: "haproxy"
state: started
enabled: yes
- name: "Configuring haproxy"
template:
src: "files/haproxy.conf.j2"
dest: "/etc/haproxy/haproxy.cfg"
notify: restart-haproxy
- name: "UFW firewall allow Proxy on port {{ proxy_port }}"
ufw:
rule: allow
port: "{{ proxy_port }}"
proto: tcp
- name: "UFW firewall allow static port on port {{ staticlb_port }}"
ufw:
rule: allow
port: "{{ staticlb_port }}"
proto: tcp
- name: Gather facts from new Server
setup:
filter: ansible_default_ipv4.address
handlers:
- name: restart-haproxy
service:
name: haproxy
state: restarted
Haproxy.conf.j2
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# https://www.haproxy.org/download/1.8/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 1000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
# utilize system-wide crypto-policies
ssl-default-bind-ciphers PROFILE=SYSTEM
ssl-default-server-ciphers PROFILE=SYSTEM
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
listen haproxy-monitoring *:{{ proxy_port }}
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend main
bind *:{{ http_port }}
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js
use_backend static if url_static
default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
balance roundrobin
server static 127.0.0.1:{{ staticlb_port }} check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance roundrobin
{% for host in groups['webservers'] %}
{{ hostvars[host].ansible_eth1.ipv4.address }}:{{ http_port }} check
{% endfor %}`
defaults (vars file)
http_host: "hdvld"
http_conf: "hdvld.conf"
http_port: "80"
proxy_port: "8080"
disable_default: true
staticlb_port: "4331"
I'm doing something wrong, but i can't find the issue.. Yesterday I have been searching and trying the whole day so there are some quoted pieces off code inside the files, please ignore it..
** Added the inventory file
This is the inventory file
# Generated by Vagrant
HDVLD-TEST-LB01 ansible_host=127.0.0.1 ansible_port=2200 ansible_user='vagrant' ansible_ssh_private_key_file='/home/web01/VM2022/template/.vagrant/machines/HDVLD-TEST-LB01/virtualbox/private_key'
HDVLD-TEST-WEB02 ansible_host=127.0.0.1 ansible_port=2201 ansible_user='vagrant' ansible_ssh_private_key_file='/home/web01/VM2022/template/.vagrant/machines/HDVLD-TEST-WEB02/virtualbox/private_key'
HDVLD-TEST-WEB01 ansible_host=127.0.0.1 ansible_port=2222 ansible_user='vagrant' ansible_ssh_private_key_file='/home/web01/VM2022/template/.vagrant/machines/HDVLD-TEST-WEB01/virtualbox/private_key'
[webservers]
HDVLD-TEST-WEB01
HDVLD-TEST-WEB02
[loadbalancer]
HDVLD-TEST-LB01

Answer 1

in the first play: (you could replace the first 2 tasks)
- name: N1
hosts: webservers
tasks:
- name: get eth1 adress
set_fact:
ips: "{{ ips | d({}) | combine({_ho: _ip}) }}"
loop: "{{ ansible_play_hosts }}"
vars:
_ho: "{{ item }}"
_ip: "{{ ansible_eth1.ipv4.address }}"
- name: add variables to dummy host
add_host:
name: "variable_holder"
shared_variable: "{{ ips }}"
:
in the second play:
- name: N2
hosts: loadbalancer
gather_facts: true
vars:
ips: "{{ hostvars['variable_holder']['shared_variable'] }}"
tasks:
- name: check the value of ips
debug:
var: ips
:
:
in the j2.file change:
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance roundrobin
{% for host in groups['webservers'] if ips[host] is defined %}
{{ ips[host] }}:{{ http_port }} check
{% endfor %}`