Ansible: Quick Start - Run from Mac to Install Apache on AWS/EC2

In this post, I am going to use Ansible on mac to install apache web server on an EC2 instance.


what is Ansible?

Ansible is a configuration management tool of servers.

Similar technologies include Chef and Puppet. Two biggest different from these tools are:

  1. Ansible is in yaml vs Chef & Puppet are in Ruby
  2. Ansible is agentless and executed over ssh


install

brew install ansible


create test server

You can use Terraform to create an EC2 instance. https://web-quickstart.blogspot.com/2021/04/terraform-ec2-instance-with-ssh-setup.html

Make sure you can ssh into the server using the private key, like:

ssh -i test ec2-user@54.88.121.94


hello world

Prepare three files:

hosts

[webservers]
54.88.121.94

ansible.cfg

[defaults]
inventory = hosts
private_key_file = test
remote_user = ec2-user

playbook.yml 

---
- name: update web servers
  hosts: webservers

  tasks:
  - name: test message
    debug:
      msg: "Hello, World!"

 and run the ansible-playbook command to display the message:

% ansible-playbook playbook.yml 
PLAY [update web servers] ********************************************************************************************************

TASK [Gathering Facts] ***********************************************************************************************************
[WARNING]: Platform linux on host 54.88.121.94 is using the discovered Python interpreter at /usr/bin/python, but future
installation of another Python interpreter could change the meaning of that path. See
https://docs.ansible.com/ansible/2.10/reference_appendices/interpreter_discovery.html for more information.
ok: [54.88.121.94]

TASK [test message] **************************************************************************************************************
ok: [54.88.121.94] => {
    "msg": "Hello, World!"
}

PLAY RECAP ***********************************************************************************************************************
54.88.121.94               : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   


install apache

Modify the playbook to run sudo yum install httpd.

playbook.yml

---
- name: update web servers
  hosts: webservers
  become: yes

  tasks:
  - name: test message
    debug:
      msg: "Hello, World!"
  - name: 
    yum:
      name: httpd
      state: present
% ansible-playbook playbook.yml
PLAY [update web servers] ********************************************************************************************************

TASK [Gathering Facts] ***********************************************************************************************************
[WARNING]: Platform linux on host 54.88.121.94 is using the discovered Python interpreter at /usr/bin/python, but future
installation of another Python interpreter could change the meaning of that path. See
https://docs.ansible.com/ansible/2.10/reference_appendices/interpreter_discovery.html for more information.
ok: [54.88.121.94]

TASK [test message] **************************************************************************************************************
ok: [54.88.121.94] => {
    "msg": "Hello, World!"
}

TASK [yum] ***********************************************************************************************************************
changed: [54.88.121.94]

PLAY RECAP ***********************************************************************************************************************
54.88.121.94               : ok=3    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

Comments

Post a Comment

Popular posts from this blog

Minikube Installation for M1 Mac

Image
In this post, I am going to try Minikube on Mac with M1 Chip. what is minikube Minikube is k8s tool running on a local machine. See also kind  for multi cluster implementation for local k8s. install % curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-arm64 % install minikube-darwin-arm64 /usr/local/bin/minikube % minikube version  minikube version: v1.20.0  Note: Installing with brew fails due to a different binary as of 2021-05-24. % brew install minikube % minikube version ❌  Exiting due to MK_WRONG_BINARY_M1: You are trying to run amd64 binary on M1 system. Please use darwin/arm64 binary instead (Download at https://github.com/kubernetes/minikube/releases/download/v1.20.0/minikube-darwin-amd64.) % brew uninstall minikube start The default driver 'virtualbox' is not supported on M1, but you can use 'docker' driver:  https://minikube.sigs.k8s.io/docs/drivers/docker/  . Make sure docker is running, and then specify the driver when starting
Read more

Selenide: Quick Start

Selenide is a Selenium wrapper in Java for testing.   This post describes how you can start using Selenide (using Gradle). 1. Setup Java Application # keep pressing enters to choose default values gradle init --type java-application # confirm that test succeeds gradle test 2. Add Selenide Dependency open build.gradle and edit as: dependencies {   ...   testImplementation 'com.codeborne:selenide:5.13.0' } 3. Write Test (replace the existing test with selenide code) src/test/java/selenide/AppTest.java package selenide; import static com.codeborne.selenide.Condition.text; import static com.codeborne.selenide.Selenide.$; import static com.codeborne.selenide.Selenide.open; import org.junit.Test;   public class AppTest { @Test public void test() { open("https://www.google.ca/"); $("input[type=text]").val("test").pressEnter(); $("body").shouldHave(text("test")); } } 4. Run Selenide gradle test This will open a browser t
Read more

PyCharm: Quick Start

Image
PyCharm is IDE for Python developed by JetBrains. In this post, I am going to show you how I installed it on Mac, did hello world, and used the debugging feature. 1. install You can install the Community Edition, which is free. $ brew install pycharm-ce 2. setup & create project Open the application: $ open /Applications/PyCharm\ CE.app/ and follow the instructions. Then, create a test project. 3. hello world (Hi, PyCharm) Click on the run button on the upper right. 4. debug Replace the code to test the debugging feature. add a breakpoint, then press the debug button. You will see that it stops at the breakpoint, and values in the variables are displayed.
Read more