Ansible: check if a package is installed on a remote system

Arseny Zinchenko - Mar 10 '19 - - Dev Community

Have a self-written letsencrypt role (see the Prometheus: RTFM blog monitoring set up with Ansible – Grafana, Loki, and promtail post).

Before running the Let’s Encrypt client to obtain a new certificate – need to check if NGINX is installed on a remote host.

Let’s use the package_facts module:



...
- name: "Check if NGINX is installed"
  package_facts:
    manager: "auto"
...
Enter fullscreen mode Exit fullscreen mode

And add a conditional check with when using the ansible_facts.packages array:



...
- name: "NGINX test result"
  debug: 
    msg: "NGINX found"
  when: "'nginx' in ansible_facts.packages"

- name: "NGINX test result"
  debug: 
    msg: "NGINX NOT found"
  when: "'nginx' not in ansible_facts.packages"
Enter fullscreen mode Exit fullscreen mode

Check:



...
TASK [test : Check if NGINX is installed] ****
ok: [ssh.dev.rtfm.co.ua]

TASK [test : NGINX test result] ****
ok: [ssh.dev.rtfm.co.ua] => {
  "msg": "NGINX found"
}

TASK [test : NGINX test result] ****
skipping: [ssh.dev.rtfm.co.ua]

PLAY RECAP ****
ssh.dev.rtfm.co.ua      : ok=3    changed=0    unreachable=0    failed=0
...
Enter fullscreen mode Exit fullscreen mode

Remove NGINX:



root@rtfm-do-dev:~# apt purge nginx
Enter fullscreen mode Exit fullscreen mode

Run again:



...
TASK [test : Check if NGINX is installed] ****
ok: [ssh.dev.rtfm.co.ua]

TASK [test : NGINX test result] ****
skipping: [ssh.dev.rtfm.co.ua]

TASK [test : NGINX test result] ****
ok: [ssh.dev.rtfm.co.ua] => {
  "msg": "NGINX NOT found"
}

PLAY RECAP ****

ssh.dev.rtfm.co.ua      : ok=3    changed=0    unreachable=0    failed=0
Enter fullscreen mode Exit fullscreen mode

Done.

Similar posts

Image
Optimizing RAG Context: Chunking and Summarization for Technical Docs

rag, ai, llm, development
Image
Java JVM, JRE and JDK
Image
40 Days Of Kubernetes (8/40)

kubernetes
Image
Dealing with Rejection After Applying to Hundreds of Jobs

career, mindset, productivity, growth
Image
My Journey into Web Development: From the Basics to Building Real Projects
Image
All About JavaScript Function
Image
Day 28 - Secure Your Kubernetes Deployments: A Beginner's Guide to Anchore
Image
Here are ten YouTube channels that focus on teaching about artificial intelligence:
Image
Exploring Concurrency and Parallelism in PHP: Hands-On Tutorials and Tips
Image
Best Practices for Managing EKS Clusters: Security, Scalability, and GitOps
Image
Mastering Git: A Curated List of Must-Know Commands for Efficient Version Control
Image
Steps for installing a local AI copilot in Visual Studio Code
Image
Optimizing Cloud Resources: Best Practices for Cost, Performance, and Scalability
Image
Power set

java, leetcode, bitmanipulation, dsa
Image
BrownEyeBeauty Css
Image
Understanding Streams in Node.js — Efficient Data Handling
Image
Benefits of Next.js Compared to React.js
Image
Nixos the better way of system management !
Image
Is Docker Desktop Just a GUI?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terabox Video Player