BigW Consortium Gitlab

database_mysql.md 2.92 KB
Newer Older
1
# Database MySQL
2

3 4
## Note

5
We do not recommend using MySQL due to various issues. For example, case [(in)sensitivity](https://dev.mysql.com/doc/refman/5.0/en/case-sensitivity.html) and [problems](https://bugs.mysql.com/bug.php?id=65830) that [suggested](https://bugs.mysql.com/bug.php?id=50909) [fixes](https://bugs.mysql.com/bug.php?id=65830) [have](https://bugs.mysql.com/bug.php?id=63164).
6 7 8

## MySQL

9 10
    # Install the database packages
    sudo apt-get install -y mysql-server mysql-client libmysqlclient-dev
Robert Speicher committed
11

12 13
    # Ensure you have MySQL version 5.5.14 or later
    mysql --version
14

15 16
    # Pick a MySQL root password (can be anything), type it and press enter
    # Retype the MySQL root password and press enter
17

18
    # Secure your installation
19
    sudo mysql_secure_installation
20

21 22
    # Login to MySQL
    mysql -u root -p
23

24
    # Type the MySQL root password
25

26 27 28 29
    # Create a user for GitLab
    # do not type the 'mysql>', this is part of the prompt
    # change $password in the command below to a real password you pick
    mysql> CREATE USER 'git'@'localhost' IDENTIFIED BY '$password';
30

31
    # Ensure you can use the InnoDB engine which is necessary to support long indexes
32 33
    # If this fails, check your MySQL config files (e.g. `/etc/mysql/*.cnf`, `/etc/mysql/conf.d/*`) for the setting "innodb = off"
    mysql> SET storage_engine=INNODB;
Robert Speicher committed
34

35 36
    # Create the GitLab production database
    mysql> CREATE DATABASE IF NOT EXISTS `gitlabhq_production` DEFAULT CHARACTER SET `utf8` COLLATE `utf8_unicode_ci`;
37

38
    # Grant the GitLab user necessary permissions on the database
39
    mysql> GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, CREATE TEMPORARY TABLES, DROP, INDEX, ALTER, LOCK TABLES ON `gitlabhq_production`.* TO 'git'@'localhost';
40

41 42
    # Quit the database session
    mysql> \q
43

44 45
    # Try connecting to the new database with the new user
    sudo -u git -H mysql -u git -p -D gitlabhq_production
46

47
    # Type the password you replaced $password with earlier
48

49
    # You should now see a 'mysql>' prompt
50

51 52
    # Quit the database session
    mysql> \q
53

54
    # You are done installing the database and can go back to the rest of the installation.
55 56 57

## MySQL strings limits

Robert Speicher committed
58
After installation or upgrade, remember to run the `add_limits_mysql` Rake task:
59 60 61 62 63

```
bundle exec rake add_limits_mysql
```

Robert Speicher committed
64 65 66
The `text` type in MySQL has a different size limit than the `text` type in
PostgreSQL. In MySQL `text` columns are limited to ~65kB, whereas in PostgreSQL
`text` columns are limited up to ~1GB!
67

Robert Speicher committed
68 69 70
The `add_limits_mysql` Rake task converts some important `text` columns in the
GitLab database to `longtext` columns, which can persist values of up to 4GB
(sometimes less if the value contains multibyte characters).
71

Robert Speicher committed
72 73
Details can be found in the [PostgreSQL][postgres-text-type] and
[MySQL][mysql-text-types] manuals.
74 75 76

[postgres-text-type]: http://www.postgresql.org/docs/9.1/static/datatype-character.html
[mysql-text-types]: http://dev.mysql.com/doc/refman/5.7/en/string-type-overview.html