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--- ansible:ansible_cmd [2021/11/10 15:11]
manu
+++ ansible:ansible_cmd [2024/04/19 12:26] (current)
manu [All ansible commands]
@@ Line 1: / Line 1: @@
 ====== Ansible command examples ======
+===== All ansible commands =====
+https://docs.ansible.com/ansible/latest/command_guide/command_line_tools.html
+**ansible-rulebook** : start a playbook based on a specific event
+  https://blog.stephane-robert.info/post/ansible-event-driven/
+**ansible-pull** : opposite to ansible is based on the push mode, offering a central management, the pull mode can be use in specific cases
+  https://blog.octo.com/ansible-pull-killer-feature
+**ansible-galaxy** : get collections of playbooks
+**ansible** : Define and run a single task ‘playbook’ against a set of hosts
+**ansible-playbook** : Define and run a single task ‘playbook’ against a set of hosts
+**ansible-config** : View ansible configuration
+**ansible-console** : REPL console for executing Ansible tasks
+**ansible-doc** : plugin documentation tool
+**ansible-galaxy** : Perform various Role and Collection related operations
+**ansible-inventory** : Show Ansible inventory information, by default it uses the inventory script JSON format
+**ansible-vault** : encryption/decryption utility for Ansible data files
+**ansible-lint** : check playbook syntax
 ===== cmd =====
-<cli>
+<cli prompt='#'>
-ansible all -m ping
+# ansible all -m ping
-ansible foo.example.com -m yum -a "name=httpd state=installed"
+# ansible -vvv -i "node1," all -u user1 -m ping       # debug
-ansible -i hosts all -m yum -a 'name=ncdu state=present'
+# ansible foo.example.com -m yum -a "name=httpd state=installed"
-ansible -i hosts all -m yum -a 'name=ncdu state=absent'
+# ansible -i hosts all -m yum -a 'name=ncdu state=present'
-ansible foo.example.com -a "/usr/sbin/reboot"
+# ansible -i hosts all -m yum -a 'name=ncdu state=absent'
+# ansible foo.example.com -a "/usr/sbin/reboot"
+# ansible aix1 -m script -a "./myscript.sh"
 </cli>
+Commands modules for **ansible**
+  command
+  expect
+  psexec (for windows)
+  raw
+  script
+  shell
+  telnet
 Only way to pass a command on target without python installed
 <cli prompt='#'>
@@ Line 35: / Line 78: @@
 aix01 | SUCCESS => {"changed": false,"ping": "pong"}
 aix20 | SUCCESS => {"changed": false,"ping": "pong"}
+</cli>
+<cli prompt='$'>
+$ ANSIBLE_REMOTE_USER=user01 ansible all -k -K -m ping
+SSH password:
+BECOME password[defaults to SSH password]:
+.16.120.155 | FAILED! => {
+    "msg": "Using a SSH password instead of a key is not
+    possible because Host Key checking is enabled and sshpass
+    does not support this.  Please add this host's fingerprint
+    to your known_hosts file to manage this host."
+    }
+.16.120.122 | FAILED! => {
+    "msg": "Using a SSH password instead of a key is not
+    possible because Host Key checking is enabled and sshpass
+    does not support this.  Please add this host's fingerprint
+    to your known_hosts file to manage this host."
+}
+.16.120.123 | SUCCESS => {
+    "ansible_facts": {
+        "discovered_interpreter_python": "/usr/libexec/
+        platform-python"
+    },
+    "changed": false,
+    "ping": "pong"
+}
+</cli>
+File conversion:
+<cli prompt='#'>
+[root@srv1]/usr/bdl/ansible# ansible-inventory -i inventory/hosts --list
+{
+    "ALL": {
+        "children": [
+            "cluster",
+            "test1"
+        ]
+    },
+    "_meta": {
+        "hostvars": {}
+    },
+    "all": {
+        "children": [
+            "ALL",
+            "empty",
+            "managedClients",
+            "ungrouped"
+        ]
+    },
+    "cluster": {
+        "hosts": [
+            "cl1labo",
+            "cltest"
+        ]
+    },
+    "test1": {
+        "hosts": [
+            "laboh"
+        ]
+    }
+}
+</cli>
+<cli prompt='#'>
+[root@srv1]/usr/bdl/ansible# ansible-inventory -i inventory/hosts --list --yaml
+all:
+  children:
+    ALL:
+      children:
+        cluster:
+          hosts:
+            cl1labo: {}
+            cltest: {}
+        test1:
+          hosts:
+            laboh: {}
+    empty: {}
+    managedClients: {}
+    ungrouped: {}
 </cli>
@@ Line 106: / Line 230: @@
        - 'rule forward-port port=8080 protocol=tcp to-port=80 family=ipv4'
 </cli>
+==== Security ====
+<cli prompt='#'>
+---
+- hosts: all
+  become: true
+  handlers:
+    - name: restart ssh
+      service: name=sshd state=restarted
+  tasks:
+    # Use secure and encrypted communication.
+    - name: Allow sshd to listen on tcp port 2849.
+      seport:
+        ports: 2849
+        proto: tcp
+        setype: ssh_port_t
+        state: present
+      when: ansible_selinux.status == 'enabled'
+    - name: Update SSH configuration to be more secure.
+      lineinfile:
+        dest: /etc/ssh/sshd_config
+        regexp: "{{ item.regexp }}"
+        line: "{{ item.line }}"
+        state: present
+        validate: 'sshd -t -f %s'
+      with_items:
+        - regexp: "^PasswordAuthentication"
+          line: "PasswordAuthentication no"
+        - regexp: "^PermitRootLogin"
+          line: "PermitRootLogin no"
+        - regexp: "^Port"
+          line: "Port 2849"
+      notify: restart ssh
+    # User account configuration.
+    - name: Add a deployment user.
+      user:
+        name: johndoe
+        state: present
+    # Disable root login and use `sudo`.
+    - name: Add sudo rights for deployment user.
+      lineinfile:
+        dest: /etc/sudoers
+        regexp: '^johndoe'
+        line: 'johndoe ALL=(ALL) NOPASSWD: ALL'
+        state: present
+        validate: 'visudo -cf %s'
+    # Remove unused software, open only required ports.
+    - name: Remove unused packages.
+      package:
+        name:
+          - nano
+          - sendmail
+        state: absent
+    # File permissions.
+    - name: Configure the permissions for the messages log.
+      file:
+        path: /var/log/messages
+        owner: root
+        group: root
+        mode: 0600
+    # Automating updates for RHEL systems.
+    - name: Install dnf-automatic.
+      yum:
+        name: dnf-automatic
+        state: present
+    - name: Ensure dnf-automatic is running and enabled on boot.
+      service:
+        name: dnf-automatic-install.timer
+        state: started
+        enabled: yes
+    # Automating updates for Debian systems.
+    - name: Install unattended upgrades package.
+      apt:
+        name: unattended-upgrades
+        state: present
+      when: ansible_os_family == 'Debian'
+    - name: Copy unattended-upgrades configuration files in place.
+      template:
+        src: "../templates/{{ item }}.j2"
+        dest: "/etc/apt/apt.conf.d/{{ item }}"
+        owner: root
+        group: root
+        mode: 0644
+      with_items:
+        - 20auto-upgrades
+        - 50unattended-upgrades
+      when: ansible_os_family == 'Debian'
+    # Configuring a firewall with `firewalld` on RHEL.
+    - name: Ensure firewalld is running.
+      service:
+        name: firewalld
+        state: started
+    - name: Configure open ports with firewalld.
+      firewalld:
+        state: "{{ item.state }}"
+        port: "{{ item.port }}"
+        zone: external
+        immediate: yes
+        permanent: yes
+      with_items:
+        - { state: 'enabled', port: '22/tcp' }
+        - { state: 'enabled', port: '80/tcp' }
+        - { state: 'enabled', port: '123/udp' }
+    # Monitor logins and block suspect IP addresses.
+    - name: Ensure EPEL repo is present.
+      yum:
+        name: epel-release
+        state: present
+      when: ansible_os_family == 'RedHat'
+    - name: Install fail2ban (RedHat).
+      yum:
+        name: fail2ban
+        state: present
+        enablerepo: epel
+      when: ansible_os_family == 'RedHat'
+    - name: Install fail2ban (Debian).
+      apt:
+        name: fail2ban
+        state: present
+      when: ansible_os_family == 'Debian'
+    - name: Ensure fail2ban is running and enabled on boot.
+      service:
+        name: fail2ban
+        state: started
+        enabled: yes
+    # Use SELinux (Security-Enhanced Linux).
+    - name: Install Python SELinux library.
+      yum:
+        name: python3-libselinux
+        state: present
+    - name: Ensure SELinux is enabled in `targeted` mode.
+      selinux:
+        policy: targeted
+        state: enforcing
+    - name: Ensure httpd can connect to the network.
+      seboolean:
+        name: httpd_can_network_connect
+        state: yes
+        persistent: yes
+      when: ansible_selinux.status == 'enabled'
+</cli>
+==== change /etc/rc.tcpip ====
+<cli prompt='#'>
+# cat update_rc_tcpip.yml
+- name: Update /etc/rc.tcpip
+  gather_facts: no
+  hosts: ALL
+#########################################################################################################
+# Latest version date 06/10/2022
+#########################################################################################################
+# Playbook will comment line "sendmail ..."
+#########################################################################################################
+  tasks:
+  - name: Comment line begining with time_last_login
+    ansible.builtin.lineinfile:
+      path: /etc/rc.tcpip
+      regexp: '^start /usr/lib/sendmail'
+      line: '#start /usr/lib/sendmail "$src_running" "-bd -q${qpi}"'
+      backup: yes
+      firstmatch: yes
+      backrefs: yes
+    register: results
+  - name: Restart tcpip demon group if file modified
+    shell: "/usr/sbin/refresh -g tcpip"
+    when: results.changed == true
+</cli>

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