- Introduction
- Supported Web Browsers
- Contributing
- Reporting Issues
- Installation
- Quick Start
- Configuration
- Shell Access
- Upgrading
- Announcements
- References
Dockerfile to build a GitLab CI container image.
Current Version: 5.2.0
Requires gitlab v.7.5.0 or newer
- Chrome (Latest stable version)
- Firefox (Latest released version)
- Safari 7+ (Know problem: required fields in html5 do not work)
- Opera (Latest released version)
- IE 10+
If you find this image useful here's how you can help:
- Send a Pull Request with your awesome new features and bug fixes
- Help new users with Issues they may encounter
- Send me a tip via Bitcoin or using Gratipay
Docker is a relatively new project and is active being developed and tested by a thriving community of developers and testers and every release of docker features many enhancements and bugfixes.
Given the nature of the development and release cycle it is very important that you have the latest version of docker installed because any issue that you encounter might have already been fixed with a newer docker release.
For ubuntu users I suggest installing docker using docker's own package repository since the version of docker packaged in the ubuntu repositories are a little dated.
Here is the shortform of the installation of an updated version of docker on ubuntu.
sudo apt-get purge docker.io
curl -s https://get.docker.io/ubuntu/ | sudo sh
sudo apt-get update
sudo apt-get install lxc-docker
Fedora and RHEL/CentOS users should try disabling selinux with setenforce 0
and check if resolves the issue. If it does than there is not much that I can help you with. You can either stick with selinux disabled (not recommended by redhat) or switch to using ubuntu.
If using the latest docker version and/or disabling selinux does not fix the issue then please file a issue request on the issues page.
In your issue report please make sure you provide the following information:
- The host ditribution and release version.
- Output of the
docker version
command - Output of the
docker info
command - The
docker run
command you used to run the image (mask out the sensitive bits).
Pull the latest version of the image from the docker index. This is the recommended method of installation as it is easier to update image in the future. These builds are performed by the Docker Trusted Build service.
docker pull sameersbn/gitlab-ci:latest
Starting from GitLab CI version 5.1.0
, You can pull a particular version of GitLab CI by specifying the version number. For example,
docker pull sameersbn/gitlab-ci:5.2.0
Alternately you can build the image yourself.
git clone https://github.com/sameersbn/docker-gitlab-ci.git
cd docker-gitlab-ci
docker build --tag="$USER/gitlab-ci" .
Before you can start the GitLab CI image you need to make sure you have a GitLab server running. Checkout the docker-gitlab project for getting a GitLab server up and running.
You need to provide the URL of the GitLab server while running GitLab CI using the GITLAB_URL
environment configuration. For example if the location of the GitLab server is 172.17.0.2
docker run --name=gitlab-ci -it --rm \
-p 10080:80 -e 'GITLAB_URL=http://172.17.0.2' \
-v /var/run/docker.sock:/run/docker.sock \
-v $(which docker):/bin/docker \
sameersbn/gitlab-ci:5.2.0
Alternately, if the GitLab and GitLab CI servers are running on the same host, you can take advantage of docker links. Lets consider that the GitLab server is running on the same host and has the name gitlab, then using docker links:
docker run --name=gitlab-ci -it --rm \
-p 10080:80 --link gitlab:gitlab \
-v /var/run/docker.sock:/run/docker.sock \
-v $(which docker):/bin/docker \
sameersbn/gitlab-ci:5.2.0
Point your browser to http://localhost:10080
and login using your GitLab credentials.
You should now have the GitLab CI ready for testing. If you want to use this image in production the please read on.
NOTE: You need to install GitLab CI Runner if you want to do anything worth while with the GitLab CI server. Please take a look at docker-gitlab-ci-runner for a base runner image.
For storage of the application data, you should mount a volume at
/home/gitlab_ci/data
SELinux users are also required to change the security context of the mount point so that it plays nicely with selinux.
mkdir -p /opt/gitlab-ci/data
sudo chcon -Rt svirt_sandbox_file_t /opt/gitlab-ci/data
Volumes can be mounted in docker by specifying the '-v' option in the docker run command.
docker run --name=gitlab-ci -it --rm \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
sameersbn/gitlab-ci:5.2.0
GitLab CI uses a database backend to store its data.
The internal mysql server has been removed from the image. Please use a linked mysql container or specify a connection to a external mysql server.
If you have been using the internal mysql server follow these instructions to migrate to a linked mysql container:
Assuming that your mysql data is available at /opt/gitlab-ci/mysql
docker run --name=mysql -d \
-v /opt/gitlab-ci/mysql:/var/lib/mysql \
sameersbn/mysql:latest
This will start a mysql container with your existing mysql data. Now login to the mysql container and create a user for the existing gitlab_ci_production
database.
All you need to do now is link this mysql container to the gitlab ci container using the --link mysql:mysql
option and provide the DB_NAME
, DB_USER
and DB_PASS
parameters.
Refer to Linking to MySQL Container for more information.
The image can be configured to use an external MySQL database instead of starting a MySQL server internally. The database configuration should be specified using environment variables while starting the GitLab CI image.
Before you start the GitLab CI image create user and database for GitLab CI.
CREATE USER 'gitlab_ci'@'%.%.%.%' IDENTIFIED BY 'password';
CREATE DATABASE IF NOT EXISTS `gitlab_ci_production` DEFAULT CHARACTER SET `utf8` COLLATE `utf8_unicode_ci`;
GRANT ALL PRIVILEGES ON `gitlab_ci_production`.* TO 'gitlab_ci'@'%.%.%.%';
We are now ready to start the container.
Assuming that the mysql server host is 192.168.1.100
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_URL=http://172.17.0.2' \
-e 'DB_HOST=192.168.1.100' -e 'DB_NAME=gitlab_ci_production' \
-e 'DB_USER=gitlab_ci' -e 'DB_PASS=password' \
sameersbn/gitlab-ci:5.2.0
You can link this image with a mysql container for the database requirements. The alias of the mysql server container should be set to mysql while linking with the gitlab ci image.
If a mysql container is linked, only the DB_TYPE
, DB_HOST
and DB_PORT
settings are automatically retrieved using the linkage. You may still need to set other database connection parameters such as the DB_NAME
, DB_USER
, DB_PASS
and so on.
To illustrate linking with a mysql container, we will use the sameersbn/mysql image. When using docker-mysql in production you should mount a volume for the mysql data store. Please refer the README of docker-mysql for details.
First, lets pull the mysql image from the docker index.
docker pull sameersbn/mysql:latest
For data persistence lets create a store for the mysql and start the container.
SELinux users are also required to change the security context of the mount point so that it plays nicely with selinux.
mkdir -p /opt/mysql/data
sudo chcon -Rt svirt_sandbox_file_t /opt/mysql/data
The run command looks like this.
docker run --name=mysql -d \
-e 'DB_NAME=gitlab_ci_production' \
-e 'DB_USER=gitlab_ci' -e 'DB_PASS=password' \
-v /opt/mysql/data:/var/lib/mysql \
sameersbn/mysql:latest
The above command will create a database named gitlab_ci_production
and also create a user named gitlab_ci
with the password password
with full/remote access to the gitlab_ci_production
database.
We are now ready to start the GitLab CI application.
docker run --name=gitlab-ci -it --rm --link mysql:mysql \
-e 'GITLAB_URL=http://172.17.0.2' \
sameersbn/gitlab-ci:5.2.0
The image will automatically fetch the DB_NAME
, DB_USER
and DB_PASS
variables from the mysql container using the magic of docker links and works with the following images:
The image also supports using an external PostgreSQL Server. This is also controlled via environment variables.
CREATE ROLE gitlab_ci with LOGIN CREATEDB PASSWORD 'password';
CREATE DATABASE gitlab_ci_production;
GRANT ALL PRIVILEGES ON DATABASE gitlab_ci_production to gitlab_ci;
We are now ready to start the container.
Assuming that the PostgreSQL server host is 192.168.1.100
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_URL=http://172.17.0.2' \
-e 'DB_TYPE=postgres' -e 'DB_HOST=192.168.1.100' \
-e 'DB_NAME=gitlab_ci_production' \
-e 'DB_USER=gitlab_ci' -e 'DB_PASS=password' \
sameersbn/gitlab-ci:5.2.0
You can link this image with a postgresql container for the database requirements. The alias of the postgresql server container should be set to postgresql while linking with the gitlab ci image.
If a postgresql container is linked, only the DB_TYPE
, DB_HOST
and DB_PORT
settings are automatically retrieved using the linkage. You may still need to set other database connection parameters such as the DB_NAME
, DB_USER
, DB_PASS
and so on.
To illustrate linking with a postgresql container, we will use the sameersbn/postgresql image. When using postgresql image in production you should mount a volume for the postgresql data store. Please refer the README of docker-postgresql for details.
First, lets pull the postgresql image from the docker index.
docker pull sameersbn/postgresql:latest
For data persistence lets create a store for the postgresql and start the container.
SELinux users are also required to change the security context of the mount point so that it plays nicely with selinux.
mkdir -p /opt/postgresql/data
sudo chcon -Rt svirt_sandbox_file_t /opt/postgresql/data
The run command looks like this.
docker run --name=postgresql -d \
-e 'DB_NAME=gitlab_ci_production' \
-e 'DB_USER=gitlab_ci' -e 'DB_PASS=password' \
-v /opt/postgresql/data:/var/lib/postgresql \
sameersbn/postgresql:latest
The above command will create a database named gitlab_ci_production
and also create a user named gitlab_ci
with the password password
with access to the gitlab_ci_production
database.
We are now ready to start the GitLab CI application.
docker run --name=gitlab-ci -it --rm --link postgresql:postgresql \
-e 'GITLAB_URL=http://172.17.0.2' \
sameersbn/gitlab-ci:5.2.0
The image will automatically fetch the DB_NAME
, DB_USER
and DB_PASS
variables from the postgresql container using the magic of docker links and works with the following images:
GitLab CI uses the redis server for its key-value data store. The redis server connection details can be specified using environment variables.
The internal redis server has been removed from the image. Please use a linked redis container or specify a external redis connection.
The image can be configured to use an external redis server instead of starting a redis server internally. The configuration should be specified using environment variables while starting the GitLab CI image.
Assuming that the redis server host is 192.168.1.100
docker run --name=gitlab-ci -it --rm \
-e 'REDIS_HOST=192.168.1.100' -e 'REDIS_PORT=6379' \
sameersbn/gitlab-ci:5.2.0
You can link this image with a redis container to satisfy GitLab CI's redis requirement. The alias of the redis server container should be set to redisio while linking with the GitLab image.
To illustrate linking with a redis container, we will use the sameersbn/redis image. Please refer the README of docker-redis for details.
First, lets pull the redis image from the docker index.
docker pull sameersbn/redis:latest
Lets start the redis container
docker run --name=redis -d sameersbn/redis:latest
We are now ready to start the GitLab CI application.
docker run --name=gitlab-ci -it --rm --link redis:redisio \
sameersbn/gitlab:latest
The mail configuration should be specified using environment variables while starting the GitLab CI image. The configuration defaults to using gmail to send emails and requires the specification of a valid username and password to login to the gmail servers.
Please refer the Available Configuration Parameters section for the list of SMTP parameters that can be specified.
docker run --name=gitlab-ci -it --rm \
-e 'SMTP_USER=USER@gmail.com' -e 'SMTP_PASS=PASSWORD' \
sameersbn/gitlab-ci:5.2.0
Please look up the Available Configuration Parameters section for all available SMTP configuration options.
Access to the gitlab ci application can be secured using SSL so as to prevent unauthorized access to the data in your repositories. While a CA certified SSL certificate allows for verification of trust via the CA, a self signed certificates can also provide an equal level of trust verification as long as each client takes some additional steps to verify the identity of your website. I will provide instructions on achieving this towards the end of this section.
To secure your application via SSL you basically need two things:
- Private key (.key)
- SSL certificate (.crt)
When using CA certified certificates, these files are provided to you by the CA. When using self-signed certificates you need to generate these files yourself. Skip the following section if you are armed with CA certified SSL certificates.
Jump to the Using HTTPS with a load balancer section if you are using a load balancer such as hipache, haproxy or nginx.
Generation of self-signed SSL certificates involves a simple 3 step procedure.
STEP 1: Create the server private key
openssl genrsa -out gitlab_ci.key 2048
STEP 2: Create the certificate signing request (CSR)
openssl req -new -key gitlab_ci.key -out gitlab_ci.csr
STEP 3: Sign the certificate using the private key and CSR
openssl x509 -req -days 365 -in gitlab_ci.csr -signkey gitlab_ci.key -out gitlab_ci.crt
Congratulations! you have now generated an SSL certificate thats valid for 365 days.
This section provides you with instructions to strengthen your server security. To achieve this we need to generate stronger DHE parameters.
openssl dhparam -out dhparam.pem 2048
Out of the four files generated above, we need to install the gitlab_ci.key
, gitlab_ci.crt
and dhparam.pem
files at the gitlab ci server. The CSR file is not needed, but do make sure you safely backup the file (in case you ever need it again).
The default path that the gitlab ci application is configured to look for the SSL certificates is at /home/gitlab_ci/data/certs
, this can however be changed using the SSL_KEY_PATH
, SSL_CERTIFICATE_PATH
and SSL_DHPARAM_PATH
configuration options.
If you remember from above, the /home/gitlab_ci/data
path is the path of the data store, which means that we have to create a folder named certs
inside /opt/gitlab-ci/data
and copy the files into it and as a measure of security we will update the permission on the gitlab_ci.key
file to only be readable by the owner.
mkdir -p /opt/gitlab-ci/data/certs
cp gitlab_ci.key /opt/gitlab-ci/data/certs/
cp gitlab_ci.crt /opt/gitlab-ci/data/certs/
cp dhparam.pem /opt/gitlab-ci/data/certs/
chmod 400 /opt/gitlab-ci/data/certs/gitlab_ci.key
Great! we are now just one step away from having our application secured.
HTTPS support can be enabled by setting the GITLAB_CI_HTTPS
option to true
.
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_CI_HTTPS=true' \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
sameersbn/gitlab-ci:5.2.0
In this configuration, any requests made over the plain http protocol will automatically be redirected to use the https protocol. However, this is not optimal when using a load balancer.
HSTS if supported by the browsers makes sure that your users will only reach your sever via HTTPS. When the user comes for the first time it sees a header from the server which states for how long from now this site should only be reachable via HTTPS - that's the HSTS max-age value.
With GITLAB_CI_HTTPS_HSTS_MAXAGE
you can configure that value. The default value is 31536000
seconds. If you want to disable a already sent HSTS MAXAGE value, set it to 0
.
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_CI_HTTPS=true' \
-e 'GITLAB_CI_HTTPS_HSTS_MAXAGE=2592000'
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
sameersbn/gitlab-ci:5.2.0
If you want to completely disable HSTS set GITLAB_CI_HTTPS_HSTS_ENABLED
to false
.
Load balancers like nginx/haproxy/hipache talk to backend applications over plain http and as such the installation of ssl keys and certificates are not required and should NOT be installed in the container. The SSL configuration has to instead be done at the load balancer. Hoewever, when using a load balancer you MUST set GITLAB_CI_HTTPS
to true
.
With this in place, you should configure the load balancer to support handling of https requests. But that is out of the scope of this document. Please refer to Using SSL/HTTPS with HAProxy for information on the subject.
When using a load balancer, you probably want to make sure the load balancer performs the automatic http to https redirection. Information on this can also be found in the link above.
In summation, when using a load balancer, the docker command would look for the most part something like this:
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_CI_HTTPS=true' \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
sameersbn/gitlab-ci:5.2.0
This section deals will self-signed ssl certificates. If you are using CA certified certificates, your done.
This section is more of a client side configuration so as to add a level of confidence at the client to be 100 percent sure they are communicating with whom they think they.
This is simply done by adding the servers certificate into their list of trusted ceritficates. On ubuntu, this is done by copying the gitlab_ci.crt
file to /usr/local/share/ca-certificates/
and executing update-ca-certificates
.
Again, this is a client side configuration which means that everyone who is going to communicate with the server should perform this configuration on their machine. In short, distribute the gitlab_ci.crt
file among your developers and ask them to add it to their list of trusted ssl certificates.
You can do the same at the web browser. Instructions for installing the root certificate for firefox can be found here. You will find similar options chrome, just make sure you install the certificate under the authorities tab of the certificate manager dialog.
There you have it, thats all there is to it.
If your GitLab server is using self-signed SSL certificates then you should make sure the GitLab server certificate is trusted on the GitLab CI server for them to be able to talk to each other.
The default path image is configured to look for the trusted SSL certificates is at /home/gitlab_ci/data/certs/ca.crt
, this can however be changed using the CA_CERTIFICATES_PATH
configuration option.
Copy the ca.crt
file into the certs directory on the datastore. The ca.crt
file should contain the root certificates of all the servers you want to trust. With respect to GitLab, this will be the contents of the gitlab.crt
file as described in the README of the docker-gitlab container.
By default, our own server certificate gitlab_ci.crt is added to the trusted certificates list.
By default GitLab CI expects that your application is running at the root (eg. /). This section explains how to run your application inside a directory.
Let's assume we want to deploy our application to '/ci'. GitLab CI needs to know this directory to generate the appropriate routes. This can be specified using the GITLAB_CI_RELATIVE_URL_ROOT
configuration option like so:
docker run --name=gitlab-ci -it --rm \
-e 'GITLAB_CI_RELATIVE_URL_ROOT=/ci' \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
sameersbn/gitlab-ci:5.2.0
GitLab CI will now be accessible at the /ci
path, e.g. http://www.example.com/ci
.
Note: The GITLAB_CI_RELATIVE_URL_ROOT
parameter should always begin with a slash and SHOULD NOT have any trailing slashes.
docker run --name=gitlab-ci -d -h gitlab-ci.local.host \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
-v /opt/gitlab-ci/mysql:/var/lib/mysql \
-e 'GITLAB_URL=http://172.17.0.2' \
-e 'GITLAB_CI_HOST=gitlab-ci.local.host' \
-e 'GITLAB_CI_EMAIL=gitlab@local.host' \
-e 'GITLAB_CI_SUPPORT=support@local.host' \
-e 'SMTP_USER=USER@gmail.com' -e 'SMTP_PASS=PASSWORD' \
sameersbn/gitlab-ci:5.2.0
If you are using an external mysql database
docker run --name=gitlab-ci -d -h gitlab-ci.local.host \
-v /opt/gitlab-ci/data:/home/gitlab_ci/data \
-e 'DB_HOST=192.168.1.100' -e 'DB_NAME=gitlab_ci_production' \
-e 'DB_USER=gitlab_ci' -e 'DB_PASS=password' \
-e 'GITLAB_URL=http://172.17.0.2' \
-e 'GITLAB_CI_HOST=gitlab-ci.local.host' \
-e 'GITLAB_CI_EMAIL=gitlab@local.host' \
-e 'GITLAB_CI_SUPPORT=support@local.host' \
-e 'SMTP_USER=USER@gmail.com' -e 'SMTP_PASS=PASSWORD' \
sameersbn/gitlab-ci:5.2.0
Please refer the docker run command options for the --env-file
flag where you can specify all required environment variables in a single file. This will save you from writing a potentially long docker run command.
Below is the complete list of available options that can be used to customize your GitLab CI installation.
- GITLAB_URL: Url of the GitLab server to allow connections from. No defaults. Automatically configured when a GitLab server is linked using docker links feature.
- GITLAB_CI_HOST: The hostname of the GitLab CI server. Defaults to
localhost
. - GITLAB_CI_PORT: The port number of the GitLab CI server. Defaults to
80
for plain http and443
when https is enabled. - GITLAB_CI_EMAIL: The email address for the GitLab CI server. Defaults to
gitlab@localhost
. - GITLAB_CI_SUPPORT: The support email address for the GitLab CI server. Defaults to
support@localhost
. - GITLAB_CI_NOTIFY_ON_BROKEN_BUILDS: Enable or disable broken build notification emails. Defaults to
true
- GITLAB_CI_NOTIFY_ADD_COMMITTER: Add committer to recipients list of broken build notification emails. Defaults to
false
- GITLAB_CI_HTTPS: Set to
true
to enable https support, disabled by default. - GITLAB_CI_HTTPS_HSTS_ENABLED: Advanced configuration option for turning off the HSTS configuration. Applicable only when SSL is in use. Defaults to
true
. See #138 for use case scenario. - GITLAB_CI_HTTPS_HSTS_MAXAGE: Advanced configuration option for setting the HSTS max-age in the gitlab-ci nginx vHost configuration. Applicable only when SSL is in use. Defaults to
31536000
. - GITLAB_CI_RELATIVE_URL_ROOT: The sub URI of the GitLab CI server, e.g.
/ci
. No default. - SSL_CERTIFICATE_PATH: Location of the ssl certificate. Defaults to
/home/gitlab_ci/data/certs/gitlab.crt
- SSL_KEY_PATH: Location of the ssl private key. Defaults to
/home/gitlab_ci/data/certs/gitlab.key
- SSL_DHPARAM_PATH: Location of the dhparam file. Defaults to
/home/gitlab_ci/data/certs/dhparam.pem
- NGINX_WORKERS: The number of nginx workers to start. Defaults to
1
. - NGINX_MAX_UPLOAD_SIZE: Maximum acceptable upload size. Defaults to
20m
. - NGINX_X_FORWARDED_PROTO: Advanced configuration option for the
proxy_set_header X-Forwarded-Proto
setting in the gitlab-ci nginx vHost configuration. Defaults tohttps
whenGITLAB_CI_HTTPS
istrue
, else defaults to$scheme
. - REDIS_HOST: The hostname of the redis server. Defaults to
localhost
- REDIS_PORT: The connection port of the redis server. Defaults to
6379
. - UNICORN_WORKERS: The number of unicorn workers to start. Defaults to
2
. - UNICORN_TIMEOUT: Sets the timeout of unicorn worker processes. Defaults to
60
seconds. - DB_TYPE: The database type. Possible values:
mysql
,postgres
. Defaults tomysql
. - DB_HOST: The database server hostname. Defaults to
localhost
. - DB_PORT: The database server port. Defaults to
3306
for mysql and5432
for postgresql. - DB_NAME: The database database name. Defaults to
gitlab_ci_production
- DB_USER: The database database user. Defaults to
root
- DB_PASS: The database database password. Defaults to no password
- DB_POOL: The database database connection pool count. Defaults to
10
. - SMTP_ENABLED: Enable mail delivery via SMTP. Defaults to
true
ifSMTP_USER
is defined, else defaults tofalse
. - SMTP_DOMAIN: SMTP domain. Defaults to
www.gmail.com
- SMTP_HOST: SMTP server host. Defaults to
smtp.gmail.com
- SMTP_PORT: SMTP server port. Defaults to
587
. - SMTP_USER: SMTP username.
- SMTP_PASS: SMTP password.
- SMTP_OPENSSL_VERIFY_MODE: SMTP openssl verification mode. Accepted values are
none
,peer
,client_once
andfail_if_no_peer_cert
. SSL certificate verification is performed by default. - SMTP_STARTTLS: Enable STARTTLS. Defaults to
true
. - SMTP_AUTHENTICATION: Specify the SMTP authentication method. Defaults to
login
ifSMTP_USER
is set.
For debugging and maintenance purposes you may want access the containers shell. If you are using docker version 1.3.0
or higher you can access a running containers shell using docker exec
command.
docker exec -it gitlab-ci bash
If you are using an older version of docker, you can use the nsenter linux tool (part of the util-linux package) to access the container shell.
Some linux distros (e.g. ubuntu) use older versions of the util-linux which do not include the nsenter
tool. To get around this @jpetazzo has created a nice docker image that allows you to install the nsenter
utility and a helper script named docker-enter
on these distros.
To install nsenter
execute the following command on your host,
docker run --rm -v /usr/local/bin:/target jpetazzo/nsenter
Now you can access the container shell using the command
sudo docker-enter gitlab-ci
For more information refer https://github.com/jpetazzo/nsenter
To upgrade to newer GitLab CI releases, simply follow this 3 step upgrade procedure.
- Step 1: Update the docker image.
docker pull sameersbn/gitlab-ci:5.2.0
- Step 2: Stop and remove the currently running image
docker stop gitlab-ci
docker rm gitlab-ci
- Step 3: Start the image
docker run --name=gitlab-ci -d [OPTIONS] sameersbn/gitlab-ci:5.2.0