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44 lines
2.1 KiB
Markdown
44 lines
2.1 KiB
Markdown
# defaults/
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This directory contains default variable definition files for the `docker-mariadb` Ansible role. It centralizes all configurable values related to MariaDB deployment and can be adjusted without modifying task logic.
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---
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## files and their purpose
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### `main.yml`
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Defines default values for how the MariaDB database should be created.
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* **`database_encoding`** (string):
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* **Default:** `"utf8mb4"`
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* **Reasoning:**
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* **Full Unicode support**: `utf8mb4` is the only MySQL/MariaDB character set that fully implements 4‑byte UTF‑8, allowing storage of emojis, supplementary symbols, and all global scripts without data loss.
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* **Future‑proof:** Modern applications and standards have converged on UTF‑8; using `utf8mb4` avoids migration challenges later.
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* **Performance trade‑off:** While slightly more storage might be used compared to `latin1`, the universality of `utf8mb4` outweighs the cost for most deployments.
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* **`database_collation`** (string):
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* **Default:** `"utf8mb4_unicode_ci"`
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* **Reasoning:**
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* **Accurate sorting & comparison:** This collation uses full Unicode algorithm rules, ensuring linguistically correct comparisons across many languages.
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* **Case‑insensitive (`ci`):** Most web apps expect case‑insensitive matching for usernames, emails, and search queries, improving usability.
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* **Neutral choice:** Unlike language‑specific collations, `unicode_ci` works robustly in multilingual contexts without bias.
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> **Tip:** If you have a legacy application requiring a different charset or collation (e.g., for backward compatibility with existing data), simply override `database_encoding` and `database_collation` in your playbook-level variables.
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## Overriding default variables
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To customize any of these values without editing role defaults:
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1. Create or update a playbook-level vars file (e.g. `group_vars/all/docker-mariadb.yml`).
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2. Set the desired values, for example:
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```yaml
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database_encoding: "latin1"
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database_collation: "latin1_swedish_ci"
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```
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3. Run your playbook—Ansible’s variable precedence ensures your overrides take effect. |