OpenShift#
Just in case CF gets too expensive, how feasible would the OpenShift platform be as second choice?
Requirements:
- runnable jars
- ease of use for developers (with no infrastructure hassle)
- service registry (run your own eureka or so ?)
- pricing
Pricing#
Looking at https://www.openshift.com/pricing/index.html
it says that running a "Medium Production gear" of 1GB costs $0.05 / hour.
For a year this is 24x365x0.05 = $ 438,- per year
Runnable jar.#
Searched around a bit, came to http://www.tearsofaunicorn.com/articles/2013/11/24/deploying-dropwizard-to-openshift.html.... TBC
It says you should use a DIY cartridge, which then says:
The Do-It-Yourself (DIY) application type is a blank slate for trying unsupported languages, frameworks, and middleware on OpenShift. See the community site for examples of bringing your favorite framework to OpenShift. OpenShift maintained Receives automatic security updates
Start to create a DIY project and enter my (ssh) git url, but it says :
Source code repository could not be cloned: 'git@github.com:metskem/demoapp1.git'. Git clone using SSH requires the OpenShift server to authenticate to the repository. Please verify the repository is correct, and try a non-SSH URL such as HTTPS.So trying the https version https://github.com/metskem/demoapp1.git
It takes about a minute, then my app is created. It again warns me:
Disclaimer: This is an experimental cartridge that provides a way to try unsupported languages, frameworks, and middleware on OpenShift.
It provides me an Overview page and instructions how to do code changes:
git clone ssh://583f185e2d5271b8c6000069@diy-computerhok.rhcloud.com/~/git/diy.git/ cd diy/
My app of course fails because it requires one envvar ( How do I provide envvars in advance? Looks like I need the oc command for that ) ==> Yes:
➜ ~ rhc set-env DROPWIZARD_YAML=src/main/resources/dropwizard.yml --app diy Setting environment variable(s) ... done
The overview page BTW says my app is started, but it is not (I also get a 503, from a RedHat Apache server of course).
I can also ssh into my gear, the ui says ssh 583f185e2d5271b8c6000069@diy-computerhok.rhcloud.com .
[diy-computerhok.rhcloud.com /]\> lsb_release -a LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch Distributor ID: RedHatEnterpriseServer Description: Red Hat Enterprise Linux Server release 6.7 (Santiago) Release: 6.7 Codename: Santiago [diy-computerhok.rhcloud.com /]\> java -version java version "1.7.0_121" OpenJDK Runtime Environment (rhel-2.6.8.1.el6_8-i386 u121-b00) OpenJDK Server VM (build 24.121-b00, mixed mode)
An old java version unfortunately.
Download oc/rhc cli#
See Installing the cli. However, now I need a RedHat account.
I found another location to download the command: http://repo.openshift3roadshow.com/clients/oc-linux.tar.gz
Extracted this one and copied to /usr/local/bin.
Syntax:
oc command syntax
➜ ~ oc Developer and Administrator Client This client exposes commands for managing your applications, as well as lower level tools to interact with each component of your system. To create a new application, you can use the example app source. Login to your server and then run new-app: $ oc login $ oc new-app centos/ruby-22-centos7~https://github.com/openshift/ruby-hello-world.git This will create an application based on the Docker image 'centos/ruby-22-centos7' that builds the source code at 'github.com/openshift/ruby-hello-world.git'. A build will start automatically and a deployment will start as soon as the build finishes. Once your application is deployed, use the status, get, and describe commands to see more about the created components: $ oc status $ oc describe deploymentconfig ruby-hello-world $ oc get pods You'll be able to view the deployed application on the IP and port of the service that new-app created for you. You can easily switch between multiple projects using 'oc project <projectname>'. Basic Commands: types An introduction to concepts and types login Log in to a server new-project Request a new project new-app Create a new application status Show an overview of the current project project Switch to another project Build and Deploy Commands: start-build Start a new build build-logs Show logs from a build deploy View, start, cancel, or retry a deployment rollback Revert part of an application back to a previous deployment new-build Create a new build configuration cancel-build Cancel a pending or running build import-image Imports images from a Docker registry scale Change the number of pods in a deployment tag Tag existing images into image streams Application Modification Commands: get Display one or many resources describe Show details of a specific resource or group of resources edit Edit a resource on the server env Update the environment on a resource with a pod template volumes Update volume on a resource with a pod template label Update the labels on a resource annotate Update the annotations on a resource expose Expose a replicated application as a service or route stop Deprecated: Gracefully shut down a resource by name or filename. delete Delete resources by filenames, stdin, resources and names, or by resources and label selector. Troubleshooting and Debugging Commands: explain Documentation of resources. logs Print the logs for a resource. rsh Start a shell session in a pod rsync Copy files between local filesystem and a pod exec Execute a command in a container. port-forward Forward one or more local ports to a pod. proxy Run a proxy to the Kubernetes API server Advanced Commands: create Create a resource by filename or stdin replace Replace a resource by filename or stdin. patch Update field(s) of a resource by stdin. process Process a template into list of resources export Export resources so they can be used elsewhere run Run a particular image on the cluster. attach Attach to a running container. policy Manage authorization policy secrets Manage secrets convert Convert config files between different API versions Settings Commands: logout End the current server session config Change configuration files for the client whoami Return information about the current session Other Commands: version Display version help Help about any command Use "oc help <command>" for more information about a given command. Use "oc options" for a list of global command-line options (applies to all commands).
But I cannot find which endpoint to use.
Maybe I should use the rhc command, see https://developers.openshift.com/getting-started/debian-ubuntu.html for installing.
You have to install ruby-full first and then sudo gem install rhc.
Next is the rhc setup cmd:
➜ ~ rhc setup OpenShift Client Tools (RHC) Setup Wizard This wizard will help you upload your SSH keys, set your application namespace, and check that other programs like Git are properly installed. If you have your own OpenShift server, you can specify it now. Just hit enter to use the server for OpenShift Online: openshift.redhat.com. You can add more servers later using 'rhc server'.
Then it hangs...
When specifying all arguments it works:
➜ ~ rhc setup --server openshift.redhat.com --clean --rhlogin harry.metske@gmail.com --password <your password> OpenShift Client Tools (RHC) Setup Wizard This wizard will help you upload your SSH keys, set your application namespace, and check that other programs like Git are properly installed. Using harry.metske@gmail.com to login to openshift.redhat.com OpenShift can create and store a token on disk which allows to you to access the server without using your password. The key is stored in your home directory and should be kept secret. You can delete the key at any time by running 'rhc logout'. Please enter "yes" or "no". yes Generating an authorization token for this client ... lasts about 1 month Saving configuration to /home/metskem/.openshift/express.conf ... done Checking for git ... found git version 2.7.4 Checking common problems .. done Checking for a domain ... computerhok Checking for applications ... found 1 diy http://diy-computerhok.rhcloud.com/ You are using 1 of 3 total gears The following gear sizes are available to you: small Your client tools are now configured.
