Introduction
Building further on the very simple Hello World Flask app that I created, I wanted to see how difficult it was to do the same on OpenShift. Luckily, the Openshift team has prepared a template app for deploying Flask apps on Openshift. That makes life a bit easier.
$ rhc app create hello python-2.7 Application Options ------------------- Domain: wymedia Cartridges: python-2.7 Gear Size: default Scaling: no Creating application 'hello' ... done Waiting for your DNS name to be available ... done Cloning into 'hello'... The authenticity of host 'hello-wymedia.rhcloud.com (54.211.231.139)' can't be established. RSA key fingerprint is cf:ee:77:cb:0e:fc:02:d7:72:7e:ae:80:c0:90:88:a7. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'hello-wymedia.rhcloud.com,54.211.231.139' (RSA) to the list of known hosts. Your application 'hello' is now available. URL: http://hello-wymedia.rhcloud.com/ SSH to: 53fb256e4382ec3a4e0001ad@hello-wymedia.rhcloud.com Git remote: ssh://53fb256e4382ec3a4e0001ad@hello-wymedia.rhcloud.com/~/git/hello.git/ Cloned to: /home/cisco/Documents/training/Flask_Todo_SQLAlchemy/hello
To see a bit more information about the app, we can use the show-app command from Openshift.
$ rhc show-app hello
hello @ http://hello-wymedia.rhcloud.com/ (uuid: 53fb256e4382ec3a4e0001ad)
--------------------------------------------------------------------------
Domain: wymedia
Created: 2:00 PM
Gears: 1 (defaults to small)
Git URL: ssh://53fb256e4382ec3a4e0001ad@hello-wymedia.rhcloud.com/~/git/hello.git/
SSH: 53fb256e4382ec3a4e0001ad@hello-wymedia.rhcloud.com
Deployment: auto (on git push)
python-2.7 (Python 2.7)
-----------------------
Gears: 1 small
Next, we will add the upstream repository to our local git config and we will pul the sample app to our local app.
$ git remote add upstream -m master git://github.com/openshift/flask-example.git $ git pull -s recursive -X theirs upstream master warning: no common commits remote: Counting objects: 122, done. remote: Total 122 (delta 0), reused 0 (delta 0) Receiving objects: 100% (122/122), 16.29 KiB, done. Resolving deltas: 100% (53/53), done. From git://github.com/openshift/flask-example * branch master -> FETCH_HEAD Auto-merging setup.py Merge made by the 'recursive' strategy. .gitignore | 4 +++ .openshift/action_hooks/build | 5 ++++ .openshift/action_hooks/deploy | 5 ++++ .openshift/action_hooks/post_deploy | 4 +++ .openshift/action_hooks/pre_build | 5 ++++ README | 55 +++++++++++++++++++++++++++++++++++ README.md | 39 +++++++++++++++++++++++++ setup.py | 4 +-- wsgi/application | 22 ++++++++++++++ wsgi/myflaskapp.py | 10 +++++++ wsgi/static/README | 12 ++++++++ 11 files changed, 163 insertions(+), 2 deletions(-) create mode 100644 .gitignore create mode 100755 .openshift/action_hooks/build create mode 100755 .openshift/action_hooks/deploy create mode 100755 .openshift/action_hooks/post_deploy create mode 100755 .openshift/action_hooks/pre_build create mode 100644 README create mode 100644 README.md create mode 100644 data/.gitkeep create mode 100644 libs/.gitkeep create mode 100644 wsgi/application create mode 100644 wsgi/myflaskapp.py create mode 100644 wsgi/static/README ....
The folder structure that we will have after pulling the repository will look like:
Next, we will push the local git to our Openshift application.
$ git push Counting objects: 129, done. Compressing objects: 100% (64/64), done. ....[output from git] remote: Starting Python 2.7 cartridge (Apache+mod_wsgi) remote: Application directory "wsgi/" selected as DocumentRoot remote: Application "wsgi/application" selected as default WSGI entry point remote: ------------------------- remote: Git Post-Receive Result: success remote: Activation status: success remote: Deployment completed with status: success To ssh://53fb256e4382ec3a4e0001ad@hello-wymedia.rhcloud.com/~/git/hello.git/ 96583b2..409254b master -> master
We can then go to our Openshift application hello-
I have added the full code to Github