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# Troubleshooting
This is to troubleshoot https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/245
But it might contain useful commands for other cases as well.
The configuration to add the postgres log in vim is:
postgresql['log_directory'] = '/var/log/gitlab/postgresql'
# Commands
```bash
sudo docker build --tag gitlab/gitlab-ce:latest docker/
sudo docker rm -f gitlab
sudo docker exec -it gitlab vim /etc/gitlab/gitlab.rb
sudo docker exec gitlab tail -f /var/log/gitlab/reconfigure.log
sudo docker exec gitlab tail -f /var/log/gitlab/postgresql/current
sudo docker exec gitlab cat /var/opt/gitlab/postgresql/data/postgresql.conf | grep shared_buffers
sudo docker exec gitlab cat /etc/gitlab/gitlab.rb
```
# Interactively
```bash
# First start a GitLab container without starting GitLab
# This is almost the same as starting the GitLab container except:
# - we run interactively (-t -i)
# - we define TERM=linux because it allows to use arrow keys in vi (!!!)
# - we choose another startup command (bash)
sudo docker run --ti \
-e TERM=linux
--publish 80443:443 --publish 8080:80 --publish 2222:22 \
--name gitlab \
--restart always \
--volume /srv/gitlab/config:/etc/gitlab \
--volume /srv/gitlab/logs:/var/log/gitlab \
--volume /srv/gitlab/data:/var/opt/gitlab \
gitlab/gitlab-ce:latest \
bash
# Configure GitLab to redirect PostgreSQL logs
echo "postgresql['log_directory'] = '/var/log/gitlab/postgresql'" >> /etc/gitlab/gitlab.rb
# Prevent Postgres from allocating 25% of total memory
echo "postgresql['shared_buffers'] = '1MB'" >> /etc/gitlab/gitlab.rb
# You can now start GitLab manually from Bash (in the background)
# Maybe the command below is still missing something to run in the background
gitlab-ctl reconfigure > /var/log/gitlab/reconfigure.log & /opt/gitlab/embedded/bin/runsvdir-start &
# Inspect PostgreSQL config
cat /var/opt/gitlab/postgresql/data/postgresql.conf | grep shared_buffers
# And tail the logs (PostgreSQL log may not exist immediately)
tail -f /var/log/gitlab/reconfigure.log /var/log/gitlab/postgresql/current
# And get the memory
cat /proc/meminfo
head /proc/sys/kernel/shmmax /proc/sys/kernel/shmall
free -m
```
# Cleanup
Remove ALL docker containers and images (also non GitLab ones).
**Be careful, because the `-v` also removes volumes attached to the images.**
```bash
# Remove all containers with attached volumes
docker rm -v $(docker ps -a -q)
# Remove all images
docker rmi $(docker images -q)
# Remove GitLab persistent data
rm -rf /srv/gitlab
```
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