This is to demo the generic usage of Ansible.
Install Ansible, boto3 and botocore via pip3. We install boto3 because it's required by Ansible Inventory EC2 plugin.
pip3 install ansible boto3 botocore
Validate by executing ansible --version and check it's using python3.
You may need to add export PATH=$HOME/.local/bin:$PATH to your ~/.bashrc or ~/.zshrc
Alternatively, you can follow https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html
- Please create a ssh key in AWS. Suggest to import your ssh public key below directly.
cat ~/.ssh/id_rsa.pub
Make sure aws cli is configures
aws configure
aws sts get-caller-identity
You need the key name and VPC id for the next step.
Use terraform to create EC2 instances
cd ${your_repo_path}/WK7_CM_Ansible_Packer/terraform
terraform init
terraform validate
# change your key_name and vpc_id variable in main.tf
terraform apply
Check created instances.
Get the value from your AWS console.
export AWS_ACCESS_KEY=YOUR_AWS_ACCESS_KEY
export AWS_SECRET_KEY=YOUR_AWS_SECRET_KEY
export ANSIBLE_HOST_KEY_CHECKING=False
Edit hosts file to add all host names.
ssh-add ~/.ssh/your_privatekey
cd ${your_repo_path}/WK7_CM_Ansible_Packer/ansible-playbooks/ansible-simple
ansible all -i hosts -u ubuntu -m ping
ansible web -i hosts -u ubuntu -m ping
# plugin aws
ansible all -i ../inventory.aws_ec2.yaml -u ubuntu -m ping
# inspect groups
ansible all -i ../inventory.aws_ec2.yaml -u ubuntu -m debug -a 'var=groups.keys()'
# ping one group
ansible tag_web -i ../inventory.aws_ec2.yaml -u ubuntu -m ping
ansible tag_web -i ../inventory.aws_ec2.yaml -u ubuntu -m command -a "df -h"
ansible tag_redis -i ../inventory.aws_ec2.yaml -u ubuntu -a "df -h" # command is the default module
ansible tag_redis -i ../inventory.aws_ec2.yaml -u ubuntu -m ansible.builtin.copy -a "src=/etc/hosts dest=/tmp/hosts"
ansible tag_redis -i ../inventory.aws_ec2.yaml -u ubuntu -a "cat /tmp/hosts"
about inventory: https://docs.ansible.com/ansible/latest/user_guide/intro_inventory.html
about ping module: https://docs.ansible.com/ansible/latest/collections/ansible/builtin/ping_module.html
about ansible plugins: https://docs.ansible.com/ansible/latest/plugins/plugins.html
about aws-ec2 plugin: https://docs.ansible.com/ansible/2.6/plugins/inventory/aws_ec2.html
all modules: https://docs.ansible.com/ansible/latest/collections/index_module.html
Let's write a playbook to do the following
- install redis (apt-get update && apt-get install redis)
- start redis server (systemtcl start redis.service)
ansible-playbook -i ../inventory.aws_ec2.yaml site.yaml
ansible tag_redis -i ../inventory.aws_ec2.yaml -u ubuntu -a "systemctl status redis"
cd ${your_repo_path}/WK7_CM_Ansible_Packer/ansible-playbooks/ansible-playbook-plain
# get all facts ansible_distribution_release
ansible tag_redis -i inventory.aws_ec2.yaml -u ubuntu -m ansible.builtin.setup
ansible-galaxy install geerlingguy.docker
ansible-galaxy install geerlingguy.pip
More about galaxy: https://docs.ansible.com/ansible/latest/galaxy/user_guide.html
Alternatively, you can use ansible-galaxy install -r requirements.yaml
Read site.yaml under ansible-playbook-plain.
ansible-playbook -i ../inventory.aws_ec2.yaml site.yaml
More about play book: https://docs.ansible.com/ansible/latest/user_guide/playbooks.html
apt_repository module: https://docs.ansible.com/ansible/latest/collections/ansible/builtin/apt_repository_module.html
conditions: https://docs.ansible.com/ansible/latest/user_guide/playbooks_conditionals.html
variables: https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html
special variables: https://docs.ansible.com/ansible/latest/reference_appendices/special_variables.html
Read site.yaml under ansible-playbook-roles.
ansible-playbook -i ../inventory.aws_ec2.yaml site.yaml
roles: https://docs.ansible.com/ansible/latest/user_guide/playbooks_reuse_roles.html
Install sth like Jenkins, Kubernetes, wordpress, nginx etc.
Learn packer and run packer examples in the packer folder.
Don't forget to delete.
terraform apply -destroy
```# ansible
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