first commit

.gitignore

+backup
+test
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README.md

+# TP 3 : Ansible
+Inès MAYA
+## Fonctionnement
+cmd : ansible-playbook -i inv.yml ansible.yml
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ansible.cfg

+[defaults]
+invetory = hosts
+remote_user = root
+host_key_checking = false
+
+[privilege_escalation]
+become = true
+become_method = sudo
+become_user = root
+become_ask_pass = false
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ansible.yml

+- hosts: all
+  vars:
+    # Variables pour les interfaces
+    interfaces:
+      H1:
+        eth0:
+          address: 192.168.1.10
+          netmask: 255.255.255.0
+          gateway: 192.168.1.1
+      H2:
+        eth0:
+          address: 192.168.2.10
+          netmask: 255.255.255.0
+          gateway: 192.168.2.1
+      R1:
+        eth0:
+          address: 192.168.1.1
+          netmask: 255.255.255.0
+        eth1:
+          address: 10.0.0.1
+          netmask: 255.255.255.0
+      R2:
+        eth0:
+          address: 192.168.2.1
+          netmask: 255.255.255.0
+        eth1:
+          address: 10.0.0.2
+          netmask: 255.255.255.0
+
+  tasks:
+    - name: Restart interfaces hostss"
+      template:
+        src: interfaces.j2
+        dest: /etc/network/interfaces.d/{{ item.key }}-{{ item.value.key }}
+      loop: "{{ interfaces | dict2items | subelements('value') }}"
+      notify: restart networking
+
+    - name: Configurer les routes statiques pour H1 et H2
+      lineinfile:
+        path: /etc/network/interfaces.d/{{ item }}-eth0
+        line: "    post-up route add default gw {{ interfaces[item].eth0.gateway }}"
+      loop:
+        - H1
+        - H2
+
+  handlers:
+    - name: restart networking
+      service:
+        name: networking
+        state: restarted

hosts

+[py3-hosts]
+H1
+R1
+H2
+
+[py3-hosts:vars]
+ansible_python_interpreter=/usr/bin/python3
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interfaces.j2

+# Loop over all the variables that start with inventory_hostname followed by "_ifname" (e.g., H1_ifname, R1_ifname1, etc.)
+{% for var in vars if var.startswith(inventory_hostname + '_ifname') %}
+
+# Get the interface name from the variable value (e.g., eth0, eth1, etc.)
+iface {{ vars[var] }} inet static
+
+# Get the IP address from another variable that has the same suffix as the current variable (e.g., H1_ipaddr, R1_ipaddr1, etc.)
+address {{ vars[inventory_hostname + '_ipaddr' + var[-1]] }}
+
+# If the host belongs to the hosts group, add a default gateway from another variable that has the same suffix as well (e.g., H1_gwaddr, H2_gwaddr, etc.)
+{% if inventory_hostname in groups['hosts'] %}
+gateway {{ vars[inventory_hostname + '_gwaddr' + var[-1]] }}
+{% endif %}
+
+# If the host belongs to the routers group, add a static route to reach the other subnet via another variable that has an incremented suffix (e.g., R1_ipaddr2, R2_ipaddr2, etc.)
+{% if inventory_hostname in groups['routers'] %}
+post-up ip route add {{ '192.168.' + ('10' if '20' in vars[inventory_hostname + '_ipaddr' + var[-1]] else '20') + '.0/24' }} via {{ vars[inventory_hostname + '_ipaddr' + str(int(var[-1]) + 1)] }}
+{% endif %}
+
+{% endfor %}
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inv.yml

+H1
+H2
+R1
+R1

inventory.ini

+[routers]
+R1
+R2
+
+[hosts]
+H1
+H2
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templates/interfaces.j2

+# templates/interfaces.j2
+auto {{ item.value.key }}
+iface {{ item.value.key }} inet static
+    address {{ item.value.value.address }}
+    netmask {{ item.value.value.netmask }}
+{% if item.value.value.gateway is defined %}
+    gateway {{ item.value.value.gateway }}
+{% endif %}
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v2.yml

+---
+- name: Configure network interfaces
+  hosts: all
+  become: true
+
+  vars:
+    # Interface configuration
+    h1_eth0:
+      ip_address: "192.168.1.1"
+      netmask: "255.255.255.0"
+      gateway: "192.168.1.254"
+    h2_eth0:
+      ip_address: "192.168.2.1"
+      netmask: "255.255.255.0"
+      gateway: "192.168.2.254"
+    r1_eth0:
+      ip_address: "192.168.1.254"
+      netmask: "255.255.255.0"
+    r1_eth1:
+      ip_address: "192.168.3.1"
+      netmask: "255.255.255.0"
+      gateway: "192.168.3.254"
+    r2_eth0:
+      ip_address: "192.168.2.254"
+      netmask: "255.255.255.0"
+    r2_eth1:
+      ip_address: "192.168.3.254"
+      netmask: "255.255.255.0"
+
+  tasks:
+    # Configure H1 interface
+    - name: Configure H1 interface
+      template:
+        src: interfaces.j2
+        dest: /etc/network/interfaces.d/eth0.cfg
+      vars:
+        ifname: "eth0"
+        iface: "iface {{ ifname }} inet static"
+        address: "{{ h1_eth0.ip_address }}"
+        netmask: "{{ h1_eth0.netmask }}"
+        gateway: "{{ h1_eth0.gateway }}"
+      when: inventory_hostname == "H1"
+      # notify: restart networking
+
+    # Configure H2 interface
+    - name: Configure H2 interface
+      template:
+        src: interfaces.j2
+        dest: /etc/network/interfaces.d/eth0.cfg
+      vars:
+        ifname: "eth0"
+        iface: "iface {{ ifname }} inet static"
+        address: "{{ h2_eth0.ip_address }}"
+        netmask: "{{ h2_eth0.netmask }}"
+        gateway: "{{ h2_eth0.gateway }}"
+      when: inventory_hostname == "H2"
+      # notify: restart networking
+
+    # Configure R1 interfaces
+    - name: Configure R1 interface eth0
+      template:
+        src: interfaces.j2
+        dest: /etc/network/interfaces.d/eth0.cfg
+      vars:
+        ifname: "eth0"
+        iface: "iface {{ ifname }} inet static"
+        address: "{{ r1_eth0.ip_address }}"
+        netmask: "{{ r1_eth0.netmask }}"
+      when: inventory_hostname == "R1"
+      # notify: restart networking
+
+    - name: Configure R1 interface eth1
+      template:
+        src: interfaces.j2
+        dest: /etc/network/interfaces.d/eth1.cfg
+      vars:
+        ifname: "eth1"
+        iface: "iface {{ ifname }} inet static"
+        address: "{{ r1_eth1.ip_address }}"
+        netmask: "{{ r1_eth1.netmask }}"
+        gateway: "{{ r1_eth1.gateway }}"