Commit dc91bf07 authored by Dark Dragon's avatar Dark Dragon

Add instructions for source installation to mysql_to_postgresql.md

parent dbb934c8
--- ---
last_updated: 2017-10-05 last_updated: 2018-02-07
--- ---
# Migrating from MySQL to PostgreSQL # Migrating from MySQL to PostgreSQL
> **Note:** This guide assumes you have a working Omnibus GitLab instance with > **Note:** This guide assumes you have a working GitLab instance with
> MySQL and want to migrate to bundled PostgreSQL database. > MySQL and want to migrate to bundled PostgreSQL database.
## Prerequisites ## Omnibus installation
### Prerequisites
First, we'll need to enable the bundled PostgreSQL database with up-to-date First, we'll need to enable the bundled PostgreSQL database with up-to-date
schema. Next, we'll use [pgloader](http://pgloader.io) to migrate the data schema. Next, we'll use [pgloader](http://pgloader.io) to migrate the data
...@@ -19,7 +21,7 @@ Here's what you'll need to have installed: ...@@ -19,7 +21,7 @@ Here's what you'll need to have installed:
- Omnibus GitLab - Omnibus GitLab
- MySQL - MySQL
## Enable bundled PostgreSQL database ### Enable bundled PostgreSQL database
1. Stop GitLab: 1. Stop GitLab:
...@@ -65,7 +67,7 @@ Here's what you'll need to have installed: ...@@ -65,7 +67,7 @@ Here's what you'll need to have installed:
After these steps, you'll have a fresh PostgreSQL database with up-to-date schema. After these steps, you'll have a fresh PostgreSQL database with up-to-date schema.
## Migrate data from MySQL to PostgreSQL ### Migrate data from MySQL to PostgreSQL
Now, you can use pgloader to migrate the data from MySQL to PostgreSQL: Now, you can use pgloader to migrate the data from MySQL to PostgreSQL:
...@@ -104,122 +106,9 @@ the following: ...@@ -104,122 +106,9 @@ the following:
----------------------------------------------- --------- --------- --------- -------------- ----------------------------------------------- --------- --------- --------- --------------
public.abuse_reports 0 0 0 0.490s public.abuse_reports 0 0 0 0.490s
public.appearances 0 0 0 0.488s public.appearances 0 0 0 0.488s
public.approvals 0 0 0 0.273s .
public.application_settings 1 1 0 0.266s .
public.approvers 0 0 0 0.339s .
public.approver_groups 0 0 0 0.357s
public.audit_events 1 1 0 0.410s
public.award_emoji 0 0 0 0.441s
public.boards 0 0 0 0.505s
public.broadcast_messages 0 0 0 0.498s
public.chat_names 0 0 0 0.576s
public.chat_teams 0 0 0 0.617s
public.ci_builds 0 0 0 0.611s
public.ci_group_variables 0 0 0 0.620s
public.ci_pipelines 0 0 0 0.599s
public.ci_pipeline_schedules 0 0 0 0.622s
public.ci_pipeline_schedule_variables 0 0 0 0.573s
public.ci_pipeline_variables 0 0 0 0.594s
public.ci_runners 0 0 0 0.533s
public.ci_runner_projects 0 0 0 0.584s
public.ci_sources_pipelines 0 0 0 0.564s
public.ci_stages 0 0 0 0.595s
public.ci_triggers 0 0 0 0.569s
public.ci_trigger_requests 0 0 0 0.596s
public.ci_variables 0 0 0 0.565s
public.container_repositories 0 0 0 0.605s
public.conversational_development_index_metrics 0 0 0 0.571s
public.deployments 0 0 0 0.607s
public.emails 0 0 0 0.602s
public.deploy_keys_projects 0 0 0 0.557s
public.events 160 160 0 0.677s
public.environments 0 0 0 0.567s
public.features 0 0 0 0.639s
public.events_for_migration 160 160 0 0.582s
public.feature_gates 0 0 0 0.579s
public.forked_project_links 0 0 0 0.660s
public.geo_nodes 0 0 0 0.686s
public.geo_event_log 0 0 0 0.626s
public.geo_repositories_changed_events 0 0 0 0.677s
public.geo_node_namespace_links 0 0 0 0.618s
public.geo_repository_renamed_events 0 0 0 0.696s
public.gpg_keys 0 0 0 0.704s
public.geo_repository_deleted_events 0 0 0 0.638s
public.historical_data 0 0 0 0.729s
public.geo_repository_updated_events 0 0 0 0.634s
public.index_statuses 0 0 0 0.746s
public.gpg_signatures 0 0 0 0.667s
public.issue_assignees 80 80 0 0.769s
public.identities 0 0 0 0.655s
public.issue_metrics 80 80 0 0.781s
public.issues 80 80 0 0.720s
public.labels 0 0 0 0.795s
public.issue_links 0 0 0 0.707s
public.label_priorities 0 0 0 0.793s
public.keys 0 0 0 0.734s
public.lfs_objects 0 0 0 0.812s
public.label_links 0 0 0 0.725s
public.licenses 0 0 0 0.813s
public.ldap_group_links 0 0 0 0.751s
public.members 52 52 0 0.830s
public.lfs_objects_projects 0 0 0 0.738s
public.merge_requests_closing_issues 0 0 0 0.825s
public.lists 0 0 0 0.769s
public.merge_request_diff_commits 0 0 0 0.840s
public.merge_request_metrics 0 0 0 0.837s
public.merge_requests 0 0 0 0.753s
public.merge_request_diffs 0 0 0 0.771s
public.namespaces 30 30 0 0.874s
public.merge_request_diff_files 0 0 0 0.775s
public.notes 0 0 0 0.849s
public.milestones 40 40 0 0.799s
public.oauth_access_grants 0 0 0 0.979s
public.namespace_statistics 0 0 0 0.797s
public.oauth_applications 0 0 0 0.899s
public.notification_settings 72 72 0 0.818s
public.oauth_access_tokens 0 0 0 0.807s
public.pages_domains 0 0 0 0.958s
public.oauth_openid_requests 0 0 0 0.832s
public.personal_access_tokens 0 0 0 0.965s
public.projects 8 8 0 0.987s
public.path_locks 0 0 0 0.925s
public.plans 0 0 0 0.923s
public.project_features 8 8 0 0.985s
public.project_authorizations 66 66 0 0.969s
public.project_import_data 8 8 0 1.002s
public.project_statistics 8 8 0 1.001s
public.project_group_links 0 0 0 0.949s
public.project_mirror_data 0 0 0 0.972s
public.protected_branch_merge_access_levels 0 0 0 1.017s
public.protected_branches 0 0 0 0.969s
public.protected_branch_push_access_levels 0 0 0 0.991s
public.protected_tags 0 0 0 1.009s
public.protected_tag_create_access_levels 0 0 0 0.985s
public.push_event_payloads 0 0 0 1.041s
public.push_rules 0 0 0 0.999s
public.redirect_routes 0 0 0 1.020s
public.remote_mirrors 0 0 0 1.034s
public.releases 0 0 0 0.993s
public.schema_migrations 896 896 0 1.057s
public.routes 38 38 0 1.021s
public.services 0 0 0 1.055s
public.sent_notifications 0 0 0 1.003s
public.slack_integrations 0 0 0 1.022s
public.spam_logs 0 0 0 1.024s
public.snippets 0 0 0 1.058s
public.subscriptions 0 0 0 1.069s
public.taggings 0 0 0 1.099s
public.timelogs 0 0 0 1.104s
public.system_note_metadata 0 0 0 1.038s
public.tags 0 0 0 1.034s
public.trending_projects 0 0 0 1.140s
public.uploads 0 0 0 1.129s
public.todos 80 80 0 1.085s
public.users_star_projects 0 0 0 1.153s
public.u2f_registrations 0 0 0 1.061s
public.web_hooks 0 0 0 1.179s
public.users 26 26 0 1.163s
public.user_agent_details 0 0 0 1.068s
public.web_hook_logs 0 0 0 1.080s public.web_hook_logs 0 0 0 1.080s
----------------------------------------------- --------- --------- --------- -------------- ----------------------------------------------- --------- --------- --------- --------------
COPY Threads Completion 4 4 0 2.008s COPY Threads Completion 4 4 0 2.008s
...@@ -240,9 +129,9 @@ the following: ...@@ -240,9 +129,9 @@ the following:
Now, you can verify that everything worked by visiting GitLab. Now, you can verify that everything worked by visiting GitLab.
## Troubleshooting ### Troubleshooting
### Permissions #### Permissions
Note that the PostgreSQL user that you use for the above MUST have **superuser** privileges. Otherwise, you may see Note that the PostgreSQL user that you use for the above MUST have **superuser** privileges. Otherwise, you may see
a similar message to the following: a similar message to the following:
...@@ -256,7 +145,7 @@ debugger invoked on a CL-POSTGRES-ERROR:INSUFFICIENT-PRIVILEGE in thread ...@@ -256,7 +145,7 @@ debugger invoked on a CL-POSTGRES-ERROR:INSUFFICIENT-PRIVILEGE in thread
QUERY: ALTER TABLE approver_groups DISABLE TRIGGER ALL; QUERY: ALTER TABLE approver_groups DISABLE TRIGGER ALL;
``` ```
### Experiencing 500 errors after the migration #### Experiencing 500 errors after the migration
If you experience 500 errors after the migration, try to clear the cache: If you experience 500 errors after the migration, try to clear the cache:
...@@ -265,3 +154,130 @@ sudo gitlab-rake cache:clear ...@@ -265,3 +154,130 @@ sudo gitlab-rake cache:clear
``` ```
[reconfigure GitLab]: ../administration/restart_gitlab.md#omnibus-gitlab-reconfigure [reconfigure GitLab]: ../administration/restart_gitlab.md#omnibus-gitlab-reconfigure
## Source installation
### Prerequisites
#### Install PostgreSQL and create database
See [installation guide](../install/installation.md#6-database).
#### Install [pgloader](http://pgloader.io) 3.4.1+
Install directly from your distro:
``` bash
sudo apt-get install pgloader
```
If this version is too old, use PostgreSQL's repository:
``` bash
# add repository
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
# add key
sudo apt-get install wget ca-certificates
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
# install package
sudo apt-get update
sudo apt-get install pgloader
```
### Enable bundled PostgreSQL database
1. Stop GitLab:
``` bash
sudo service gitlab stop
```
1. Switch database from MySQL to PostgreSQL
``` bash
cd /home/git/gitlab
sudo -u git mv config/database.yml config/database.yml.bak
sudo -u git cp config/database.yml.postgresql config/database.yml
sudo -u git -H chmod o-rwx config/database.yml
```
1. Run the following commands to prepare the schema:
``` bash
sudo -u git -H bundle exec rake db:create db:migrate RAILS_ENV=production
```
After these steps, you'll have a fresh PostgreSQL database with up-to-date schema.
### Migrate data from MySQL to PostgreSQL
Now, you can use pgloader to migrate the data from MySQL to PostgreSQL:
1. Save the following snippet in a `commands.load` file, and edit with your
MySQL `username`, `password` and `host`:
```
LOAD DATABASE
FROM mysql://username:password@host/gitlabhq_production
INTO postgresql://postgres@unix://var/run/postgresql:/gitlabhq_production
WITH include no drop, truncate, disable triggers, create no tables,
create no indexes, preserve index names, no foreign keys,
data only
ALTER SCHEMA 'gitlabhq_production' RENAME TO 'public'
;
```
1. Start the migration:
``` bash
sudo -u postgres pgloader commands.load
```
1. Once the migration finishes, you should see a summary table that looks like
the following:
```
table name read imported errors total time
----------------------------------------------- --------- --------- --------- --------------
fetch meta data 119 119 0 0.388s
Truncate 119 119 0 1.134s
----------------------------------------------- --------- --------- --------- --------------
public.abuse_reports 0 0 0 0.490s
public.appearances 0 0 0 0.488s
.
.
.
public.web_hook_logs 0 0 0 1.080s
----------------------------------------------- --------- --------- --------- --------------
COPY Threads Completion 4 4 0 2.008s
Reset Sequences 113 113 0 0.304s
Install Comments 0 0 0 0.000s
----------------------------------------------- --------- --------- --------- --------------
Total import time 1894 1894 0 12.497s
```
If there is no output for more than 30 minutes, it's possible pgloader encountered an error. See
the [troubleshooting guide](#Troubleshooting) for more details.
1. Start GitLab:
``` bash
sudo service gitlab start
```
Now, you can verify that everything worked by visiting GitLab.
### Troubleshooting
#### Experiencing 500 errors after the migration
If you experience 500 errors after the migration, try to clear the cache:
``` bash
sudo -u git -H bundle exec rake cache:clear RAILS_ENV=production
```
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