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authorMarcia Ramos <virtua.creative@gmail.com>2018-01-10 16:37:24 -0200
committerMarcia Ramos <virtua.creative@gmail.com>2018-01-10 16:37:24 -0200
commit188b6e007dbcc6da91e46b4ae00d2e714f29e62d (patch)
treed172aa16bf5e6e1ceff6bf20871a444bade3b476 /doc/articles
parent968430fe8c4eaa1de5799d9e629375c3bbe38853 (diff)
downloadgitlab-ce-188b6e007dbcc6da91e46b4ae00d2e714f29e62d.tar.gz
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@@ -62,7 +62,6 @@ upgrade, integrate, migrate to GitLab:
| :------------ | :------: | --------------: |
| [Video Tutorial: Idea to Production on Google Container Engine (GKE)](https://about.gitlab.com/2017/01/23/video-tutorial-idea-to-production-on-google-container-engine-gke/) | Tutorial | 2017-01-23 |
| [How to Setup a GitLab Instance on Microsoft Azure](https://about.gitlab.com/2016/07/13/how-to-setup-a-gitlab-instance-on-microsoft-azure/) | Tutorial | 2016-07-13 |
-| [Get started with OpenShift Origin 3 and GitLab](openshift_and_gitlab/index.md) | Tutorial | 2016-06-28 |
| [Getting started with GitLab and DigitalOcean](https://about.gitlab.com/2016/04/27/getting-started-with-gitlab-and-digitalocean/) | Tutorial | 2016-04-27 |
## Software development
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@@ -1,510 +1 @@
-# Getting started with OpenShift Origin 3 and GitLab
-
-> **Article [Type](../../development/writing_documentation.html#types-of-technical-articles):** tutorial ||
-> **Level:** intermediary ||
-> **Author:** [Achilleas Pipinellis](https://gitlab.com/axil) ||
-> **Publication date:** 2016-06-28
-
-## Introduction
-
-[OpenShift Origin][openshift] is an open source container application
-platform created by [RedHat], based on [kubernetes] and [Docker]. That means
-you can host your own PaaS for free and almost with no hassle.
-
-In this tutorial, we will see how to deploy GitLab in OpenShift using GitLab's
-official Docker image while getting familiar with the web interface and CLI
-tools that will help us achieve our goal.
-
----
-
-## Prerequisites
-
-OpenShift 3 is not yet deployed on RedHat's offered Online platform ([openshift.com]),
-so in order to test it, we will use an [all-in-one Virtualbox image][vm] that is
-offered by the OpenShift developers and managed by Vagrant. If you haven't done
-already, go ahead and install the following components as they are essential to
-test OpenShift easily:
-
-- [VirtualBox]
-- [Vagrant]
-- [OpenShift Client][oc] (`oc` for short)
-
-It is also important to mention that for the purposes of this tutorial, the
-latest Origin release is used:
-
-- **oc** `v1.3.0` (must be [installed][oc-gh] locally on your computer)
-- **openshift** `v1.3.0` (is pre-installed in the [VM image][vm-new])
-- **kubernetes** `v1.3.0` (is pre-installed in the [VM image][vm-new])
-
->**Note:**
-If you intend to deploy GitLab on a production OpenShift cluster, there are some
-limitations to bare in mind. Read on the [limitations](#current-limitations)
-section for more information and follow the linked links for the relevant
-discussions.
-
-Now that you have all batteries, let's see how easy it is to test OpenShift
-on your computer.
-
-## Getting familiar with OpenShift Origin
-
-The environment we are about to use is based on CentOS 7 which comes with all
-the tools needed pre-installed: Docker, kubernetes, OpenShift, etcd.
-
-### Test OpenShift using Vagrant
-
-As of this writing, the all-in-one VM is at version 1.3, and that's
-what we will use in this tutorial.
-
-In short:
-
-1. Open a terminal and in a new directory run:
- ```sh
- vagrant init openshift/origin-all-in-one
- ```
-1. This will generate a Vagrantfile based on the all-in-one VM image
-1. In the same directory where you generated the Vagrantfile
- enter:
-
- ```sh
- vagrant up
- ```
-
-This will download the VirtualBox image and fire up the VM with some preconfigured
-values as you can see in the Vagrantfile. As you may have noticed, you need
-plenty of RAM (5GB in our example), so make sure you have enough.
-
-Now that OpenShift is setup, let's see how the web console looks like.
-
-### Explore the OpenShift web console
-
-Once Vagrant finishes its thing with the VM, you will be presented with a
-message which has some important information. One of them is the IP address
-of the deployed OpenShift platform and in particular <https://10.2.2.2:8443/console/>.
-Open this link with your browser and accept the self-signed certificate in
-order to proceed.
-
-Let's login as admin with username/password `admin/admin`. This is what the
-landing page looks like:
-
-![openshift web console](img/web-console.png)
-
-You can see that a number of [projects] are already created for testing purposes.
-
-If you head over the `openshift-infra` project, a number of services with their
-respective pods are there to explore.
-
-![openshift web console](img/openshift-infra-project.png)
-
-We are not going to explore the whole interface, but if you want to learn about
-the key concepts of OpenShift, read the [core concepts reference][core] in the
-official documentation.
-
-### Explore the OpenShift CLI
-
-OpenShift Client (`oc`), is a powerful CLI tool that talks to the OpenShift API
-and performs pretty much everything you can do from the web UI and much more.
-
-Assuming you have [installed][oc] it, let's explore some of its main
-functionalities.
-
-Let's first see the version of `oc`:
-
-```sh
-$ oc version
-
-oc v1.3.0
-kubernetes v1.3.0+52492b4
-```
-
-With `oc help` you can see the top level arguments you can run with `oc` and
-interact with your cluster, kubernetes, run applications, create projects and
-much more.
-
-Let's login to the all-in-one VM and see how to achieve the same results like
-when we visited the web console earlier. The username/password for the
-administrator user is `admin/admin`. There is also a test user with username/
-password `user/user`, with limited access. Let's login as admin for the moment:
-
-```sh
-$ oc login https://10.2.2.2:8443
-
-Authentication required for https://10.2.2.2:8443 (openshift)
-Username: admin
-Password:
-Login successful.
-
-You have access to the following projects and can switch between them with 'oc project <projectname>':
-
- * cockpit
- * default (current)
- * delete
- * openshift
- * openshift-infra
- * sample
-
-Using project "default".
-```
-
-Switch to the `openshift-infra` project with:
-
-```sh
-oc project openshift-infra
-```
-
-And finally, see its status:
-
-```sh
-oc status
-```
-
-The last command should spit a bunch of information about the statuses of the
-pods and the services, which if you look closely is what we encountered in the
-second image when we explored the web console.
-
-You can always read more about `oc` in the [OpenShift CLI documentation][oc].
-
-### Troubleshooting the all-in-one VM
-
-Using the all-in-one VM gives you the ability to test OpenShift whenever you
-want. That means you get to play with it, shutdown the VM, and pick up where
-you left off.
-
-Sometimes though, you may encounter some issues, like OpenShift not running
-when booting up the VM. The web UI may not responding or you may see issues
-when trying to login with `oc`, like:
-
-```
-The connection to the server 10.2.2.2:8443 was refused - did you specify the right host or port?
-```
-
-In that case, the OpenShift service might not be running, so in order to fix it:
-
-1. SSH into the VM by going to the directory where the Vagrantfile is and then
- run:
-
- ```sh
- vagrant ssh
- ```
-
-1. Run `systemctl` and verify by the output that the `openshift` service is not
- running (it will be in red color). If that's the case start the service with:
-
- ```sh
- sudo systemctl start openshift
- ```
-
-1. Verify the service is up with:
-
- ```sh
- systemctl status openshift -l
- ```
-
-Now you will be able to login using `oc` (like we did before) and visit the web
-console.
-
-## Deploy GitLab
-
-Now that you got a taste of what OpenShift looks like, let's deploy GitLab!
-
-### Create a new project
-
-First, we will create a new project to host our application. You can do this
-either by running the CLI client:
-
-```bash
-$ oc new-project gitlab
-```
-
-or by using the web interface:
-
-![Create a new project from the UI](img/create-project-ui.png)
-
-If you used the command line, `oc` automatically uses the new project and you
-can see its status with:
-
-```sh
-$ oc status
-
-In project gitlab on server https://10.2.2.2:8443
-
-You have no services, deployment configs, or build configs.
-Run 'oc new-app' to create an application.
-```
-
-If you visit the web console, you can now see `gitlab` listed in the projects list.
-
-The next step is to import the OpenShift template for GitLab.
-
-### Import the template
-
-The [template][templates] is basically a JSON file which describes a set of
-related object definitions to be created together, as well as a set of
-parameters for those objects.
-
-The template for GitLab resides in the Omnibus GitLab repository under the
-docker directory. Let's download it locally with `wget`:
-
-```bash
-wget https://gitlab.com/gitlab-org/omnibus-gitlab/raw/master/docker/openshift-template.json
-```
-
-And then let's import it in OpenShift:
-
-```bash
-oc create -f openshift-template.json -n openshift
-```
-
->**Note:**
-The `-n openshift` namespace flag is a trick to make the template available to all
-projects. If you recall from when we created the `gitlab` project, `oc` switched
-to it automatically, and that can be verified by the `oc status` command. If
-you omit the namespace flag, the application will be available only to the
-current project, in our case `gitlab`. The `openshift` namespace is a global
-one that the administrators should use if they want the application to be
-available to all users.
-
-We are now ready to finally deploy GitLab!
-
-### Create a new application
-
-The next step is to use the template we previously imported. Head over to the
-`gitlab` project and hit the **Add to Project** button.
-
-![Add to project](img/add-to-project.png)
-
-This will bring you to the catalog where you can find all the pre-defined
-applications ready to deploy with the click of a button. Search for `gitlab`
-and you will see the previously imported template:
-
-![Add GitLab to project](img/add-gitlab-to-project.png)
-
-Select it, and in the following screen you will be presented with the predefined
-values used with the GitLab template:
-
-![GitLab settings](img/gitlab-settings.png)
-
-Notice at the top that there are three resources to be created with this
-template:
-
-- `gitlab-ce`
-- `gitlab-ce-redis`
-- `gitlab-ce-postgresql`
-
-While PostgreSQL and Redis are bundled in Omnibus GitLab, the template is using
-separate images as you can see from [this line][line] in the template.
-
-The predefined values have been calculated for the purposes of testing out
-GitLab in the all-in-one VM. You don't need to change anything here, hit
-**Create** to start the deployment.
-
-If you are deploying to production you will want to change the **GitLab instance
-hostname** and use greater values for the volume sizes. If you don't provide a
-password for PostgreSQL, it will be created automatically.
-
->**Note:**
-The `gitlab.apps.10.2.2.2.xip.io` hostname that is used by default will
-resolve to the host with IP `10.2.2.2` which is the IP our VM uses. It is a
-trick to have distinct FQDNs pointing to services that are on our local network.
-Read more on how this works in <http://xip.io>.
-
-Now that we configured this, let's see how to manage and scale GitLab.
-
-## Manage and scale GitLab
-
-Setting up GitLab for the first time might take a while depending on your
-internet connection and the resources you have attached to the all-in-one VM.
-GitLab's docker image is quite big (~500MB), so you'll have to wait until
-it's downloaded and configured before you use it.
-
-### Watch while GitLab gets deployed
-
-Navigate to the `gitlab` project at **Overview**. You can notice that the
-deployment is in progress by the orange color. The Docker images are being
-downloaded and soon they will be up and running.
-
-![GitLab overview](img/gitlab-overview.png)
-
-Switch to the **Browse > Pods** and you will eventually see all 3 pods in a
-running status. Remember the 3 resources that were to be created when we first
-created the GitLab app? This is where you can see them in action.
-
-![Running pods](img/running-pods.png)
-
-You can see GitLab being reconfigured by taking look at the logs in realtime.
-Click on `gitlab-ce-2-j7ioe` (your ID will be different) and go to the **Logs**
-tab.
-
-![GitLab logs](img/gitlab-logs.png)
-
-At a point you should see a _**gitlab Reconfigured!**_ message in the logs.
-Navigate back to the **Overview** and hopefully all pods will be up and running.
-
-![GitLab running](img/gitlab-running.png)
-
-Congratulations! You can now navigate to your new shinny GitLab instance by
-visiting <http://gitlab.apps.10.2.2.2.xip.io> where you will be asked to
-change the root user password. Login using `root` as username and providing the
-password you just set, and start using GitLab!
-
-### Scale GitLab with the push of a button
-
-If you reach to a point where your GitLab instance could benefit from a boost
-of resources, you'd be happy to know that you can scale up with the push of a
-button.
-
-In the **Overview** page just click the up arrow button in the pod where
-GitLab is. The change is instant and you can see the number of [replicas] now
-running scaled to 2.
-
-![GitLab scale](img/gitlab-scale.png)
-
-Upping the GitLab pods is actually like adding new application servers to your
-cluster. You can see how that would work if you didn't use GitLab with
-OpenShift by following the [HA documentation][ha] for the application servers.
-
-Bare in mind that you may need more resources (CPU, RAM, disk space) when you
-scale up. If a pod is in pending state for too long, you can navigate to
-**Browse > Events** and see the reason and message of the state.
-
-![No resources](img/no-resources.png)
-
-### Scale GitLab using the `oc` CLI
-
-Using `oc` is super easy to scale up the replicas of a pod. You may want to
-skim through the [basic CLI operations][basic-cli] to get a taste how the CLI
-commands are used. Pay extra attention to the object types as we will use some
-of them and their abbreviated versions below.
-
-In order to scale up, we need to find out the name of the replication controller.
-Let's see how to do that using the following steps.
-
-1. Make sure you are in the `gitlab` project:
-
- ```sh
- oc project gitlab
- ```
-
-1. See what services are used for this project:
-
- ```sh
- oc get svc
- ```
-
- The output will be similar to:
-
- ```
- NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
- gitlab-ce 172.30.243.177 <none> 22/TCP,80/TCP 5d
- gitlab-ce-postgresql 172.30.116.75 <none> 5432/TCP 5d
- gitlab-ce-redis 172.30.105.88 <none> 6379/TCP 5d
- ```
-
-1. We need to see the replication controllers of the `gitlab-ce` service.
- Get a detailed view of the current ones:
-
- ```sh
- oc describe rc gitlab-ce
- ```
-
- This will return a large detailed list of the current replication controllers.
- Search for the name of the GitLab controller, usually `gitlab-ce-1` or if
- that failed at some point and you spawned another one, it will be named
- `gitlab-ce-2`.
-
-1. Scale GitLab using the previous information:
-
- ```sh
- oc scale --replicas=2 replicationcontrollers gitlab-ce-2
- ```
-
-1. Get the new replicas number to make sure scaling worked:
-
- ```sh
- oc get rc gitlab-ce-2
- ```
-
- which will return something like:
-
- ```
- NAME DESIRED CURRENT AGE
- gitlab-ce-2 2 2 5d
- ```
-
-And that's it! We successfully scaled the replicas to 2 using the CLI.
-
-As always, you can find the name of the controller using the web console. Just
-click on the service you are interested in and you will see the details in the
-right sidebar.
-
-![Replication controller name](img/rc-name.png)
-
-### Autoscaling GitLab
-
-In case you were wondering whether there is an option to autoscale a pod based
-on the resources of your server, the answer is yes, of course there is.
-
-We will not expand on this matter, but feel free to read the documentation on
-OpenShift's website about [autoscaling].
-
-## Current limitations
-
-As stated in the [all-in-one VM][vm] page:
-
-> By default, OpenShift will not allow a container to run as root or even a
-non-random container assigned userid. Most Docker images in the Dockerhub do not
-follow this best practice and instead run as root.
-
-The all-in-one VM we are using has this security turned off so it will not
-bother us. In any case, it is something to keep in mind when deploying GitLab
-on a production cluster.
-
-In order to deploy GitLab on a production cluster, you will need to assign the
-GitLab service account to the `anyuid` Security Context.
-
-1. Edit the Security Context:
- ```sh
- oc edit scc anyuid
- ```
-
-1. Add `system:serviceaccount:<project>:gitlab-ce-user` to the `users` section.
- If you changed the Application Name from the default the user will
- will be `<app-name>-user` instead of `gitlab-ce-user`
-
-1. Save and exit the editor
-
-## Conclusion
-
-By now, you should have an understanding of the basic OpenShift Origin concepts
-and a sense of how things work using the web console or the CLI.
-
-GitLab was hard to install in previous versions of OpenShift,
-but now that belongs to the past. Upload a template, create a project, add an
-application and you are done. You are ready to login to your new GitLab instance.
-
-And remember that in this tutorial we just scratched the surface of what Origin
-is capable of. As always, you can refer to the detailed
-[documentation][openshift-docs] to learn more about deploying your own OpenShift
-PaaS and managing your applications with the ease of containers.
-
-[RedHat]: https://www.redhat.com/en "RedHat website"
-[openshift]: https://www.openshift.org "OpenShift Origin website"
-[vm]: https://www.openshift.org/vm/ "OpenShift All-in-one VM"
-[vm-new]: https://atlas.hashicorp.com/openshift/boxes/origin-all-in-one "Official OpenShift Vagrant box on Atlas"
-[template]: https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/docker/openshift-template.json "OpenShift template for GitLab"
-[openshift.com]: https://openshift.com "OpenShift Online"
-[kubernetes]: http://kubernetes.io/ "Kubernetes website"
-[Docker]: https://www.docker.com "Docker website"
-[oc]: https://docs.openshift.org/latest/cli_reference/get_started_cli.html "Documentation - oc CLI documentation"
-[VirtualBox]: https://www.virtualbox.org/wiki/Downloads "VirtualBox downloads"
-[Vagrant]: https://www.vagrantup.com/downloads.html "Vagrant downloads"
-[projects]: https://docs.openshift.org/latest/dev_guide/projects.html "Documentation - Projects overview"
-[core]: https://docs.openshift.org/latest/architecture/core_concepts/index.html "Documentation - Core concepts of OpenShift Origin"
-[templates]: https://docs.openshift.org/latest/architecture/core_concepts/templates.html "Documentation - OpenShift templates"
-[old-post]: https://blog.openshift.com/deploy-gitlab-openshift/ "Old post - Deploy GitLab on OpenShift"
-[line]: https://gitlab.com/gitlab-org/omnibus-gitlab/blob/658c065c8d022ce858dd63eaeeadb0b2ddc8deea/docker/openshift-template.json#L239 "GitLab - OpenShift template"
-[oc-gh]: https://github.com/openshift/origin/releases/tag/v1.3.0 "Openshift 1.3.0 release on GitHub"
-[ha]: http://docs.gitlab.com/ce/administration/high_availability/gitlab.html "Documentation - GitLab High Availability"
-[replicas]: https://docs.openshift.org/latest/architecture/core_concepts/deployments.html#replication-controllers "Documentation - Replication controller"
-[autoscaling]: https://docs.openshift.org/latest/dev_guide/pod_autoscaling.html "Documentation - Autoscale"
-[basic-cli]: https://docs.openshift.org/latest/cli_reference/basic_cli_operations.html "Documentation - Basic CLI operations"
-[openshift-docs]: https://docs.openshift.org "OpenShift documentation"
+This document was moved to [another location](../../install/openshift_and_gitlab/index.html).