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Commit fc8ae32b by Kamil Trzcinski
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Update migration guide

parent 62c0e5ab
Showing with 22 additions and 130 deletions
doc/migrate_ci_to_ce/README.md
......@@ -9,14 +9,14 @@ into your GitLab CE or EE installation.
### Before we begin
**You need to have a working installation of GitLab CI version 7.14 to perform
**You need to have a working installation of GitLab CI version 8.0 to perform
this migration. The older versions are not supported and will most likely break
this migration procedure.**
This migration cannot be performed online and takes a significant amount of
time. Make sure to plan ahead.
If you are running a version of GitLab CI prior to 7.14 please follow the
If you are running a version of GitLab CI prior to 8.0 please follow the
appropriate [update guide](https://gitlab.com/gitlab-org/gitlab-ci/blob/master/doc/update/).
The migration is divided into three parts:
......@@ -42,123 +42,29 @@ cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec backup:create RAILS_ENV=production
```
#### 3. Rename database tables
If your GitLab CI installation uses **MySQL** and your GitLab CE uses **PostgreSQL**
you need to convert database data with **MYSQL_TO_POSTGRESQL**.
To prevent naming conflicts with database tables in GitLab CE or EE, we need to
rename CI's tables to begin with a `ci_` prefix:
```sh
cat <<EOF | bundle exec rails dbconsole production
ALTER TABLE application_settings RENAME TO ci_application_settings;
ALTER TABLE builds RENAME TO ci_builds;
ALTER TABLE commits RENAME TO ci_commits;
ALTER TABLE events RENAME TO ci_events;
ALTER TABLE jobs RENAME TO ci_jobs;
ALTER TABLE projects RENAME TO ci_projects;
ALTER TABLE runner_projects RENAME TO ci_runner_projects;
ALTER TABLE runners RENAME TO ci_runners;
ALTER TABLE services RENAME TO ci_services;
ALTER TABLE tags RENAME TO ci_tags;
ALTER TABLE taggings RENAME TO ci_taggings;
ALTER TABLE trigger_requests RENAME TO ci_trigger_requests;
ALTER TABLE triggers RENAME TO ci_triggers;
ALTER TABLE variables RENAME TO ci_variables;
ALTER TABLE web_hooks RENAME TO ci_web_hooks;
EOF
```
#### 4. Remove cronjob
```
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec whenever --clear-crontab
```
#### 5. Create a database dump
In this step, you will need to know information about both your CI and CE (or
EE) databases, such as the server types, hosts, and ports, and the usernames and
passwords.
We can obtain the necessary information from the `config/database.yml` files for
each installation.
1. Get the information for the CI database:
You can check that by looking into GitLab CI and GitLab CE (or EE) database configuration file:
```sh
cat /home/gitlab_ci/gitlab-ci/config/database.yml
```
1. Then for the CE (or EE) database:
```sh
cat /home/git/gitlab/config/database.yml
```
1. The output of each command should look something like this:
```yml
production:
adapter: postgresql (or mysql2)
encoding: utf8
reconnect: false
database: GITLAB_CI_DATABASE
pool: 5
username: DB_USERNAME
password: DB_PASSWORD
host: DB_HOSTNAME
port: DB_PORT
# socket: /tmp/mysql.sock
```
1. Depending on the values for `adapter`, you will have to use one of three
different commands to perform the database dump.
To create backup with database conversion (MySQL -> PostgreSQL) execute:
**NOTE:** For any of the commands below, you'll need to substitute the
values `IN_UPPERCASE` with the corresponding values from your **CI
installation's** `config/database.yml` files above.
1. If both your CI and CE (or EE) installations use **mysql2** as the `adapter`, use
`mysqldump`:
```sh
mysqldump --default-character-set=utf8 --complete-insert --no-create-info \
--host=DB_USERNAME --port=DB_PORT --user=DB_HOSTNAME -p GITLAB_CI_DATABASE \
ci_application_settings ci_builds ci_commits ci_events ci_jobs ci_projects \
ci_runner_projects ci_runners ci_services ci_tags ci_taggings ci_trigger_requests \
ci_triggers ci_variables ci_web_hooks > gitlab_ci.sql
```
1. If both your CI and CE (or EE) installations use **postgresql** as the
`adapter`, use `pg_dump`:
```sh
pg_dump -h DB_HOSTNAME -U DB_USERNAME -p DB_PORT \
--data-only GITLAB_CI_DATABASE -t "ci_*" > gitlab_ci.sql
```
1. If your CI installation uses **mysql2** as the `adapter` and your CE (or
EE) installation uses **postgresql**, use `mysqldump` to dump the
database and then convert it to PostgreSQL using [mysql-postgresql-converter]:
```sh
# Dump existing MySQL database first
mysqldump --default-character-set=utf8 --compatible=postgresql --complete-insert \
--host=DB_USERNAME --port=DB_PORT --user=DB_HOSTNAME -p GITLAB_CI_DATABASE \
ci_application_settings ci_builds ci_commits ci_events ci_jobs ci_projects \
ci_runner_projects ci_runners ci_services ci_tags ci_taggings ci_trigger_requests \
ci_triggers ci_variables ci_web_hooks > gitlab_ci.sql.tmp
# Convert database to be compatible with PostgreSQL
git clone https://github.com/gitlabhq/mysql-postgresql-converter.git -b gitlab
python mysql-postgresql-converter/db_converter.py gitlab_ci.sql.tmp gitlab_ci.sql.tmp2
ed -s gitlab_ci.sql.tmp2 < mysql-postgresql-converter/move_drop_indexes.ed
```bash
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec backup:create RAILS_ENV=production MYSQL_TO_POSTGRESQL=1
```
# Filter to only include INSERT statements
grep "^\(START\|SET\|INSERT\|COMMIT\)" gitlab_ci.sql.tmp2 > gitlab_ci.sql
```
#### 3. Remove cronjob
[mysql-postgresql-converter]: https://github.com/gitlabhq/mysql-postgresql-converter
```
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec whenever --clear-crontab
```
### Part II: GitLab CE (or EE)
......@@ -203,33 +109,19 @@ git diff origin/7-14-stable:config/gitlab.yml.example origin/8-0-stable:config/g
The new options include configuration settings for GitLab CI.
#### 6. Copy build logs
#### 6. Copy backup from GitLab CI
You need to copy the contents of GitLab CI's `builds/` directory to the
corresponding directory in GitLab CE or EE:
sudo cp -v /home/gitlab_ci/gitlab-ci/tmp/backups/*_gitlab_ci_backup.tar /home/git/gitlab/tmp/backups
sudo chown git:git /home/git/gitlab/tmp/backups/*_gitlab_ci_backup.tar
sudo rsync -av /home/gitlab_ci/gitlab-ci/builds /home/git/gitlab/builds
sudo chown -R git:git /home/git/gitlab/builds
The build logs are usually quite big so it may take a significant amount of
time.
#### 7. Import GitLab CI database
#### 7. Import GitLab CI backup
Now you'll import the GitLab CI database dump that you [created
earlier](#5-create-a-database-dump) into the GitLab CE or EE database:
sudo mv /home/gitlab_ci/gitlab-ci/gitlab_ci.sql /home/git/gitlab/gitlab_ci.sql
sudo chown git:git /home/git/gitlab/gitlab_ci.sql
sudo -u git -H bundle exec rake ci:migrate CI_DUMP=/home/git/gitlab/gitlab_ci.sql RAILS_ENV=production
This task will:
1. Delete data from all existing CI tables
1. Import data from database dump
1. Fix database auto-increments
1. Fix tags assigned to Builds and Runners
1. Fix services used by CI
sudo -u git -H bundle exec rake ci:migrate RAILS_ENV=production
This task will take some time.
#### 8. Start GitLab
......
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