Managing an Application

Track Application Changes

Drycc Workflow tracks all changes to your application. Application changes are the result of either new application code pushed to the platform (via git push drycc master), or an update to application configuration (via drycc config:set KEY=VAL).

Each time a build or config change is made to your application a new release is created. These release numbers increase monotonically.

You can see a record of changes to your application using drycc releases:

$ drycc releases
=== peachy-waxworks Releases
v4      3 minutes ago                     gabrtv deployed d3ccc05
v3      1 hour 17 minutes ago             gabrtv added DATABASE_URL
v2      6 hours 2 minutes ago             gabrtv deployed 7cb3321
v1      6 hours 2 minutes ago             gabrtv deployed drycc/helloworld

Rollback a Release

Drycc Workflow also supports rolling back go previous releases. If buggy code or an errant configuration change is pushed to your application, you may rollback to a previously known, good release.

Note

All rollbacks create a new, numbered release. But will reference the build/code and configuration from the desired rollback point.

In this example, the application is currently running release v4. Using drycc rollback v2 tells Workflow to deploy the build and configuration that was used for release v2. This creates a new release named v5 whose contents are the source and configuration from release v2:

$ drycc releases
=== folksy-offshoot Releases
v4      4 minutes ago                     gabrtv deployed d3ccc05
v3      1 hour 18 minutes ago             gabrtv added DATABASE_URL
v2      6 hours 2 minutes ago             gabrtv deployed 7cb3321
v1      6 hours 3 minutes ago             gabrtv deployed drycc/helloworld

$ drycc rollback v2
Rolled back to v2

$ drycc releases
=== folksy-offshoot Releases
v5      Just now                          gabrtv rolled back to v2
v4      4 minutes ago                     gabrtv deployed d3ccc05
v3      1 hour 18 minutes ago             gabrtv added DATABASE_URL
v2      6 hours 2 minutes ago             gabrtv deployed 7cb3321
v1      6 hours 3 minutes ago             gabrtv deployed drycc/helloworld

Run One-off Administration Tasks

Drycc applications use one-off processes for admin tasks like database migrations and other commands that must run against the live application.

Use drycc run to execute commands on the deployed application.

$ drycc run 'ls -l'
Running `ls -l`...

total 28
-rw-r--r-- 1 root root  553 Dec  2 23:59 LICENSE
-rw-r--r-- 1 root root   60 Dec  2 23:59 Procfile
-rw-r--r-- 1 root root   33 Dec  2 23:59 README.md
-rw-r--r-- 1 root root 1622 Dec  2 23:59 pom.xml
drwxr-xr-x 3 root root 4096 Dec  2 23:59 src
-rw-r--r-- 1 root root   25 Dec  2 23:59 system.properties
drwxr-xr-x 6 root root 4096 Dec  3 00:00 target

Share an Application

Use drycc perms:create to allow another Drycc user to collaborate on your application.

$ drycc perms:create otheruser
Adding otheruser to peachy-waxworks collaborators... done

Use drycc perms to see who an application is currently shared with, and drycc perms:delete to remove a collaborator.

Note

Collaborators can do anything with an application that its owner can do, except delete the application.

When working with an application that has been shared with you, clone the original repository and add Drycc' git remote entry before attempting to git push any changes to Drycc.

$ git clone https://github.com/drycc/example-java-jetty.git
Cloning into 'example-java-jetty'... done
$ cd example-java-jetty
$ git remote add -f drycc ssh://[email protected]:2222/peachy-waxworks.git
Updating drycc
From drycc-controller.local:peachy-waxworks
 * [new branch]      master     -> drycc/master

Application Troubleshooting

Applications deployed on Drycc Workflow treat logs as event streams. Drycc Workflow aggregates stdout and stderr from every Container making it easy to troubleshoot problems with your application.

Use drycc logs to view the log output from your deployed application.

$ drycc logs -f
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.5]: INFO:oejsh.ContextHandler:started o.e.j.s.ServletContextHandler{/,null}
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.8]: INFO:oejs.Server:jetty-7.6.0.v20120127
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.5]: INFO:oejs.AbstractConnector:Started [email protected]:10005
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.6]: INFO:oejsh.ContextHandler:started o.e.j.s.ServletContextHandler{/,null}
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.7]: INFO:oejsh.ContextHandler:started o.e.j.s.ServletContextHandler{/,null}
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.6]: INFO:oejs.AbstractConnector:Started [email protected]:10006
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.8]: INFO:oejsh.ContextHandler:started o.e.j.s.ServletContextHandler{/,null}
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.7]: INFO:oejs.AbstractConnector:Started [email protected]:10007
Dec  3 00:30:31 ip-10-250-15-201 peachy-waxworks[web.8]: INFO:oejs.AbstractConnector:Started [email protected]:10008