20-cluster

Ansible Lab #20 - Cluster

實習重點

Topology

• main: 10.0.0.10
• db: 10.0.0.20

Identify service dependencies

Identify hard-coded or hidden assumptions

• IP address
• Port number
• Path
• Network interface (e.g., 127.0.0.1 vs. 0.0.0.0)

Separation of configuration

Separated by...

• variables and when conditions;
• various playbook files;
• various tags.

用到的 module(s)

• File modules / lineinfile: Ensure a particular line is in a file, or replace an existing line using a back-referenced regular expression.

• Database modules / mysql_user: Adds or removes a user from a MySQL database.

想接受挑戰嗎？

• Avoid the "all hosts" % setting in the MySQL GRANT PRIVILEGES statement.

• Use Docker Compose to simplify the testing job.