ansible

This folder contains playbooks for :

• AWS EC2 provisioning (Security group and launch instances)
• Install MySQL server
• Install Memcached

There are always three scripts (dev / stage / prod) for each roles

##AWS EC2 provisioning

###Usage :

• Run ec2_provisioning role (Create a security group)

ansible-playbook -i inventory_name aws_ec2_[dev/stage/prod].yml --extra-vars="hosts=local connection=local keypair=keypair_name" --private-key=/path/to/keypair.pem --tags "ec2_provisionning"

• Run ec2_launch_instances

ansible-playbook -i inventory_name aws_ec2_[dev/stage/prod].yml --extra-vars="hosts=local connection=local keypair=keypair_name" --private-key=/path/to/keypair.pem --tags "ec2_launch_instances"

You can run both roles, without --tags options in the cmd line

###Extra vars :

For ec2_provisioning (Create a security group)

• hosts : hosts groupname

• Type : string
• No default, it must be specifiy in cmd => local or 127.0.0.1 should be a good choice

• connection :

• Type : string
• No default, it must be specifiy in cmd => local or 127.0.0.1 should be a good choice

• security_group : Security group name (will be created with this name)

• Type : string
• Default : my_security_group_[dev/prod/stage]

• region : Region name on AWS

• Type : string
• Default : eu-west-1

• server_env : Environment name (development, production, staging...)

• Type : string
• Default : dev, prod or consistent

CMD :

ansible-playbook -i inventory_name aws_ec2_[dev/stage/prod].yml --extra-vars="hosts=local connection=local security_group=security_groupname region=region_name server_env=environment_name" --private-key=/path/to/keypair.pem --tags "ec2_provisionning"

For ec2_launch_instances

• hosts : hosts groupname

• Type : string
• No default, it must be specifiy in cmd => local or 127.0.0.1 should be a good choice

• connection :

• Type : string
• No default, it must be specifiy in cmd => local or 127.0.0.1 should be a good choice

• security_group : Security group name (will be created with this name)

• Type : string
• Default : my_security_group_[dev/prod/stage]

• region : Region name on AWS

• Type : string
• Default : eu-west-1

• server_env : Environment name (development, production, staging...)

• Type : string
• Default : dev, prod or consistent

• keypair: keypair name (not the path and without .pem)

• Type : String
• Must be specify in extra vars

• group:

• Type : String
• Default : my-security-group-[dev/stage/prod]

• instance_type:

• Type : String
• Default : t2.micro (Free on AWS)

• image: (It could be a custom image)

• Type : String
• Default : ami-234ecc54 (Free on AWS)

• count: Number of instances to launch

• Type : Integer
• Default : 1

• tag_name

• Type : String
• Default : Dev / Consistent / Prod

ansible-memcached

The playbook install memcached with a custom /etc/memcached.conf

Vars :

• hosts : hosts groupname

• Type : string
• No default, it must be specifiy in cmd

• remote_user : the remote user on AWS

• Type : string
• No default, it must be specify in cmd

• listen : the listening ip address

• Type : string
• Default : 127.0.0.1

• user : the user who launch the memcached deamon

• Type : string
• Default : root

• memory : the maximum memory used (Mb)

• Type : integer
• Default : 64

• max_connections : the maximum simultaneous connections

• Type : integer
• Default : 1024

group_vars :

Variables which can be configure (group_vars/all) => for the when condition (default : true)

Usage :

###With default vars :

ansible-playbook -i hosts  memcached.yml --extra-vars "hosts=launched remote_user=ubuntu" --private-key=/path/to/keypair 

###With extra_vars :

ansible-playbook -i hosts  memcached.yml --extra-vars "hosts=launched remote_user=ubuntu listen=127.0.0.1 user=root memory=66 max_connections=1026" --private-key=/path/to/keypair

#MySQL

##Vars

• hosts : hosts groupname

• Type : string
• No default, it must be specifiy in cmd

• remote_user : the remote user on AWS

• Type : string
• No default, it must be specify in cmd

• update_apt_cache :

• Type : String
• Default : yes

• mysql_root_password : Password for the MySQL root user

• String
• Must be specify in extra vars

Others vars :

kernel_shmmax: 5368709120
shared_buffers: 3840MB
effective_cache_size: 7680MB
work_mem: 32MB
maintenance_work_mem: 1024MB
checkpoint_segments: 32
checkpoint_completion_target: 0.9
innodb_buffer_pool_size: 10G
innodb_buffer_pool_instances: 5

##Usage

CMD

 ansible-playbook -i hosts_[dev/stage/consistent] mysql_[dev/stage/prod].yml --extra-vars="hosts=hosts_groupname remote_user=remote_username mysql_root_password=root_user_password db_name=db_name_to_create db_user=db_username db_password=custom_pass" --private-key=/path/to/keypair.pem

##Bug fixed

There was a bug with innodb_buffer, MAX 8G for a t2.micro instance_type on AWS EC2