Posts Vagrant con LXC
Post
Cancel

Vagrant con LXC

Posted Feb 20, 2020 2020-02-20T17:00:00+01:00 by Ernesto Vázquez García

Explica los pasos necesarios para configurar Vagrant para que utilice LXC como proveedor y una vez configurado el sistema crea un Vagrantfile que lance dos contenedores sobre LXC en los que se instale una aplicación web en dos capas (contenedor1 con servidor web y contenedor2 con servidor de BBDD).

La configuración completa de la aplicación se realizará utilizando ansible como sistema de aprovisionamiento de Vagrant

Voy a utilizar una máquina vagrant para realizar la instalación.

Instalación de Vagrant-LXC

Lo primero que tenemos que hacer es instalar vagrant-lxc.

Para instalar vagrant-lxc en debian ejecutaremos el siguiente comando:

ernesto@honda:~$ sudo apt install vagrant-lxc

Configuraciones y paquetes necesarios para la red.

1
2
3
4
5
6
7

ernesto@honda:~$ sudo nano /etc/lxc/default.conf 

lxc.net.0.type = veth
lxc.net.0.link = virbr0
lxc.net.0.flags = up
lxc.apparmor.profile = generated
lxc.apparmor.allow_nesting = 1

Paquetes necesarios

1
2

ernesto@honda:~$ sudo apt-get install -qy libvirt-clients libvirt-daemon-system iptables ebtables dnsmasq-base
ernesto@honda:~$ sudo virsh net-start default

Vagrantfile

Agregamos lo siguiente al Vagranfile:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

ernesto@honda:~/Documentos/vagrant/lxc$ nano Vagrantfile 

Vagrant.configure("2") do |config|
  config.vm.define "db" do |ubun|
  ubun.vm.box = "sagiru/buster-amd64"
  ubun.vm.network "private_network", ip: "192.168.122.100", lxc__bridge_name: 'virbr0'
  ubun.vm.provider :lxc do |lxc|
    lxc.container_name = "servidordb"
  end
 end

  config.vm.define "servidorweb" do |ubun|
  ubun.vm.box = "sagiru/buster-amd64"
  ubun.vm.network "private_network", ip: "192.168.122.101", lxc__bridge_name: 'virbr0'
  ubun.vm.provider :lxc do |lxc|
    lxc.container_name = "servidorweb"
  end
 end
end

Ansible

Instalamos ansible en la máquina.

1

ernesto@honda:~$ sudo apt install ansible

Creamos la receta: Receta ansible

Tendremos que cambiar los siguientes ficheros de configuración del mismo repositorio para que pueda tener conexión entre ellos:

1
2
3
4
5
6
7

ernesto@honda:~/GitHub/lxc-ansible$ nano hosts 

[servidores_web]
nodo1 ansible_ssh_host=192.168.122.101 ansible_ssh_private_key_file="../.vagrant/machines/servidorweb/lxc/private_key"

[db]
nodo2 ansible_ssh_host=192.168.122.100 ansible_ssh_private_key_file="../.vagrant/machines/db/lxc/private_key"

1
2
3
4
5
6
7

ernesto@honda:~/GitHub/lxc-ansible$ nano group_vars/all 

wordpress_bd: wordpress_bd
wordpress_user: userwp
wordpress_pass: userwp
wordpress_host: 192.168.122.100
mariadb_host: '%'

Clonamos la receta

1
2
3
4
5
6
7
8
9
10
11
12

ernesto@honda:~/Documentos/vagrant/lxc$ git clone git@github.com:ernestovazquez/lxc-ansible.git
Clonando en 'lxc-ansible'...
remote: Enumerating objects: 44, done.
remote: Counting objects: 100% (44/44), done.
remote: Compressing objects: 100% (27/27), done.
remote: Total 44 (delta 2), reused 43 (delta 1), pack-reused 0
Recibiendo objetos: 100% (44/44), 7.13 KiB | 3.57 MiB/s, listo.
Resolviendo deltas: 100% (2/2), listo.
ernesto@honda:~/Documentos/vagrant/lxc$ cd lxc-ansible/

ernesto@honda:~/Documentos/vagrant/lxc/lxc-ansible$ ls
ansible.cfg  group_vars  hosts  README.md  roles  site.yaml

Ahora solamente tendremos que ejecutar la instrucción de ansible para que lo lance.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

ernesto@honda:~/Documentos/vagrant/lxc/lxc-ansible$ ansible-playbook -b site.yaml 

PLAY [all] *******************************************************************************************************************************************

TASK [Gathering Facts] *******************************************************************************************************************************
ok: [nodo2]
ok: [nodo1]

TASK [commons : Ensure system is updated] ************************************************************************************************************
 [WARNING]: Could not find aptitude. Using apt-get instead.

ok: [nodo2]
ok: [nodo1]

PLAY [servidores_web] ********************************************************************************************************************************

TASK [Gathering Facts] *******************************************************************************************************************************
ok: [nodo1]

TASK [apache2 : install apache2+php] *****************************************************************************************************************
ok: [nodo1]

TASK [apache2 : Copy index.html] *********************************************************************************************************************
ok: [nodo1]

TASK [apache2 : Copy info.php] ***********************************************************************************************************************
ok: [nodo1]

PLAY [db] ********************************************************************************************************************************************

TASK [Gathering Facts] *******************************************************************************************************************************
ok: [nodo2]

TASK [mariadb : ensure mariadb is installed] *********************************************************************************************************
ok: [nodo2]

TASK [mariadb : create database wordpress] ***********************************************************************************************************
ok: [nodo2]

TASK [mariadb : create user mysql wordpress] *********************************************************************************************************
ok: [nodo2]

TASK [mariadb : ensure mariadb binds to internal interface] ******************************************************************************************
ok: [nodo2]

PLAY [servidores_web] ********************************************************************************************************************************

TASK [Gathering Facts] *******************************************************************************************************************************
ok: [nodo1]

TASK [wordpress : install unzip] *********************************************************************************************************************
ok: [nodo1]

TASK [wordpress : download wordpress] ****************************************************************************************************************
ok: [nodo1]

TASK [wordpress : unzip wordpress] *******************************************************************************************************************
changed: [nodo1]

TASK [wordpress : copy wp-config.php] ****************************************************************************************************************
ok: [nodo1]

PLAY RECAP *******************************************************************************************************************************************
nodo1                      : ok=11   changed=1    unreachable=0    failed=0   
nodo2                      : ok=7    changed=0    unreachable=0    failed=0

Ansible en el Vagrantfile

Para que se inicie con el Vagrantfile solamente tendremos que añadir los siguiente al fichero de configuración:

1
2
3

  config.vm.provision "ansible" do |ansible|
    ansible.playbook = "lxc-ansible/site.yaml"
  end

Tambien he tenido que cambiar el nombre de la máquina a servidores_web.

Quedaria de la siguiente forma:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

Vagrant.configure("2") do |config|
  config.vm.define "db" do |ubun|
  ubun.vm.box = "sagiru/buster-amd64"
  ubun.vm.network "private_network", ip: "192.168.122.100", lxc__bridge_name: 'virbr0'
  ubun.vm.provider :lxc do |lxc|
    lxc.container_name = "servidordb"
  end
 end
  config.vm.define "servidores_web" do |ubun|
  ubun.vm.box = "sagiru/buster-amd64"
  ubun.vm.network "private_network", ip: "192.168.122.101", lxc__bridge_name: 'virbr0'
  ubun.vm.provider :lxc do |lxc|
    lxc.container_name = "servidores_web"
  end
 end
  config.vm.provision "ansible" do |ansible|
    ansible.playbook = "lxc-ansible/site.yaml"
  end
end

Vamos a ver como realizaria el despligue:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149

ernesto@honda:~/Documentos/vagrant/lxc$ vagrant up
Bringing machine 'db' up with 'lxc' provider...
Bringing machine 'servidores_web' up with 'lxc' provider...
==> db: Importing base box 'sagiru/buster-amd64'...
==> servidores_web: Importing base box 'sagiru/buster-amd64'...
==> servidores_web: Checking if box 'sagiru/buster-amd64' version '0.2' is up to date...
==> db: Checking if box 'sagiru/buster-amd64' version '0.2' is up to date...
==> db: Fixed port collision for 22 => 2222. Now on port 2200.
==> servidores_web: Setting up mount entries for shared folders...
==> db: Setting up mount entries for shared folders...
    servidores_web: /vagrant => /home/ernesto/Documentos/vagrant/lxc
    db: /vagrant => /home/ernesto/Documentos/vagrant/lxc
==> servidores_web: Starting container...
==> db: Starting container...
==> servidores_web: Waiting for machine to boot. This may take a few minutes...
==> db: Waiting for machine to boot. This may take a few minutes...
    servidores_web: SSH address: 192.168.122.43:22
    servidores_web: SSH username: vagrant
    servidores_web: SSH auth method: private key
    db: SSH address: 192.168.122.123:22
    db: SSH username: vagrant
    db: SSH auth method: private key
    servidores_web: 
    servidores_web: Vagrant insecure key detected. Vagrant will automatically replace
    servidores_web: this with a newly generated keypair for better security.
    db: 
    db: Vagrant insecure key detected. Vagrant will automatically replace
    db: this with a newly generated keypair for better security.
    db: 
    db: Inserting generated public key within guest...
    servidores_web: 
    servidores_web: Inserting generated public key within guest...
    db: Removing insecure key from the guest if it's present...
    servidores_web: Removing insecure key from the guest if it's present...
    db: Key inserted! Disconnecting and reconnecting using new SSH key...
    servidores_web: Key inserted! Disconnecting and reconnecting using new SSH key...
==> servidores_web: Machine booted and ready!
==> servidores_web: Setting up private networks...
==> db: Machine booted and ready!
==> db: Setting up private networks...
==> servidores_web: Running provisioner: ansible...
==> db: Running provisioner: ansible...
Vagrant has automatically selected the compatibility mode '2.0'
according to the Ansible version installed (2.7.7).

Alternatively, the compatibility mode can be specified in your Vagrantfile:
https://www.vagrantup.com/docs/provisioning/ansible_common.html#compatibility_mode

Vagrant has automatically selected the compatibility mode '2.0'
according to the Ansible version installed (2.7.7).

Alternatively, the compatibility mode can be specified in your Vagrantfile:
https://www.vagrantup.com/docs/provisioning/ansible_common.html#compatibility_mode

    servidores_web: Running ansible-playbook...
    db: Running ansible-playbook...

PLAY [all] *********************************************************************

TASK [Gathering Facts] *********************************************************

PLAY [all] *********************************************************************

TASK [Gathering Facts] *********************************************************
ok: [servidores_web]

TASK [commons : Ensure system is updated] **************************************
ok: [db]

TASK [commons : Ensure system is updated] **************************************
 [WARNING]: Could not find aptitude. Using apt-get instead.

changed: [servidores_web]

PLAY [servidores_web] **********************************************************

TASK [Gathering Facts] *********************************************************
 [WARNING]: Could not find aptitude. Using apt-get instead.

changed: [db]

PLAY [servidores_web] **********************************************************
skipping: no hosts matched

PLAY [db] **********************************************************************

TASK [Gathering Facts] *********************************************************
ok: [servidores_web]

TASK [apache2 : install apache2+php] *******************************************
ok: [db]

TASK [mariadb : ensure mariadb is installed] ***********************************
changed: [db]

TASK [mariadb : create database wordpress] *************************************
changed: [db]

TASK [mariadb : create user mysql wordpress] ***********************************
changed: [db]

TASK [mariadb : ensure mariadb binds to internal interface] ********************
changed: [db]

RUNNING HANDLER [mariadb : restart mariadb] ************************************
changed: [servidores_web]

TASK [apache2 : Copy index.html] ***********************************************
changed: [servidores_web]

TASK [apache2 : Copy info.php] *************************************************
changed: [servidores_web]

RUNNING HANDLER [apache2 : restart apache2] ************************************
changed: [servidores_web]

PLAY [db] **********************************************************************
skipping: no hosts matched

PLAY [servidores_web] **********************************************************

TASK [Gathering Facts] *********************************************************
ok: [servidores_web]

TASK [wordpress : install unzip] ***********************************************
changed: [db]

PLAY [servidores_web] **********************************************************
skipping: no hosts matched

PLAY RECAP *********************************************************************
db                         : ok=8    changed=6    unreachable=0    failed=0   

changed: [servidores_web]

TASK [wordpress : download wordpress] ******************************************
changed: [servidores_web]

TASK [wordpress : unzip wordpress] *********************************************
changed: [servidores_web]

TASK [wordpress : copy wp-config.php] ******************************************
changed: [servidores_web]

RUNNING HANDLER [wordpress : restart apache2] **********************************
changed: [servidores_web]

PLAY RECAP *********************************************************************
servidores_web             : ok=13   changed=10   unreachable=0    failed=0

Cloud
LXC Vagrant
This post is licensed under CC BY 4.0 by the author.

Contenido

Proxy, proxy inverso y balanceadores de carga

Movimiento de datos