Using Ansible with a Jump Server via SSH
Ansible is an open-source automation tool that is designed to automate tasks by configuring systems, deploying applications, and orchestrating complex workflows. When working with remote servers that are not directly accessible over the internet, a jump server or bastion host is often used to provide secure access. In this article, we will explore how to configure Ansible to use a jump server via SSH, allowing you to manage remote servers that are not directly accessible.
Prerequisites
Before we begin, it is assumed that you have the following:
- Ansible installed on your local machine
- Access to a jump server that can access the target servers
- SSH access to the jump server
Configuring Ansible to Use a Jump Server
To configure Ansible to use a jump server, you need to modify the Ansible configuration file, which is typically located at /etc/ansible/ansible.cfg or ~/.ansible.cfg.
Add the following lines to the configuration file:
[ssh_connection]
ssh_args = -o ProxyCommand="ssh -W %h:%p -q user@jump-server"Replace user@jump-server with your jump server SSH credentials, and %h and %p with the target host and port, respectively.
With this configuration in place, Ansible will automatically use the jump server to access the target servers.
Example Playbook
Here is an example Ansible playbook that demonstrates how to use a jump server:
- name: Manage remote servers using a jump server
hosts: target-servers
gather_facts: false
connection: local
serial: 1
tasks:
- name: Ensure package is installed
apt:
name: nginx
state: present
In this example, the hosts parameter specifies the target servers, and the connection parameter is set to local, indicating that Ansible should use the local connection plugin. The serial parameter specifies that Ansible should run the tasks serially, one host at a time.
In this article, we have explored how to configure Ansible to use a jump server via SSH, allowing you to manage remote servers that are not directly accessible. By modifying the Ansible configuration file and specifying the jump server SSH credentials, Ansible will automatically use the jump server to access the target servers.