WebFaction Django Python tips notes

Misc. notes working my way through Django/Python dev setup on WebFaction.

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Default Python:

Add this to .bash_profile:

# Default Python
# http://docs.webfaction.com/software/python.html#creating-a-python-alias
alias python=python3.4

Reload your changes:

$ source ~/.bash_profile

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Default pip

Add this to .bash_profile:

# Default pip
alias pip=pip3

Reload your changes:

$ source ~/.bash_profile

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Python's venv

First, in your home directory, make:

$ mkdir -p ~/.virtualenvs

In your .bash_profile, append this:

# Default Python
# http://docs.webfaction.com/software/python.html#creating-a-python-alias
alias python=python3

# Default pyvenv
alias pyvenv=pyvenv-3

# Default pip
alias pip=pip3

… and then reload your profile:

$ source ~/.bash_profile

Create the environment:

$ pyvenv ~/.virtualenvs/repower

Activate:

$ source ~/.virtualenvs/repower/bin/activate

Deactivate (when activated):

$ deactivate

Note, pip comes with Python 3.4 pyvenv:

$ which pip
~/.virtualenvs/repower/bin/pip

Nice!

To make it quick, add an alias to your .bash_profile:

# Simplify pyvenv activation for "repower" environment:
alias repower='source ~/.virtualenvs/repower/bin/activate'

And then reload:

source ~/.bash_profile 

Now:

$ repower

Now you can use pip (in the venv) to install dependencies/packages.

Links

• mbrochh / install_venv.sh

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Specify a default Django settings file using pyvenv

Append this to ~/username/.virtualenvs/repower/bin/activate:

export DJANGO_SETTINGS_MODULE="repower.settings.production"
echo $DJANGO_SETTINGS_MODULE

And, optionally:

$ source ~/.bash_profile

Now, when activating the virtual environment, you'll see the settings echoed upon instantiation:

$ repower
repower_root.settings.production
(repower) [mhulse@web419 repower]$ 

Important: Dont’d forget to swap production for local if developing locally.

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SSH key bitbucket

Do this:

$ ssh-keygen
# No pass (though, it's recommended)
$ chmod 644 ~/.ssh/id_rsa.pub
$ ssh-agent bash
$ ssh-add

Now we need to add the public key to BitBucket

1. Log in to Bitbucket.
2. Click on your user icon and choose ‘Manage account‘ tab
3. Under the ‘SSH keys‘ pane, copy and paste cat ~/.ssh/id_rsa.pub | pbcopy (pbcopy does not work on WebFaction) the text from your public key file (~/.ssh/id_rsa.pub) into the text input box and click the ‘Add key’ button (remove any extra line endings).
4. In the .ssh directory, add a file named config (no extension) with these contents (tabs are stripped for some reason, sorry):

Host bitbucket.org
   IdentityFile ~/.ssh/id_rsa

1. Run $ source ~/.bash_profile
2. Check if everything is working: $ ssh -T git@bitbucket.org; you should get this back:

conq: logged in as tutorials.
You can use git or hg to connect to Bitbucket. Shell access is disabled.

Verify that the command returns your account name.

1. Add this to your Git repo's .git config (tabs are being stripped, sorry):

[remote "origin"]
   url = git@bitbucket.org:user/repo.git
   fetch = +refs/heads/*:refs/remotes/origin/*

Here's a complete example (tabs stripped, sorry):

[core]
   repositoryformatversion = 0
   filemode = true
   bare = false
   logallrefupdates = true
[remote "origin"]
   url = git@bitbucket.org:user/repo.git
   fetch = +refs/heads/*:refs/remotes/origin/*
[branch "master"]
   remote = origin
   merge = refs/heads/master
[user]
   email = foo@domain.com
   name = First Last
[push]
   default = simple

1. Log out and back in to the server. You should now be able to push/pull without passwords.

• Set up SSH for Git
• Easy Bitbucket push and pulls with ssh on webfaction.

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If you get Address already in use: make_sock …

If you see:

Address already in use: make_sock: could not bind to address

And there's a port number output, like 20261, then, do this:

$ netstat -ltnp | grep ':20261'

Find the process number and kill it.

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Helpful bash aliases

Put in .bash_profile or .bashrc:

# Restart Apache:
alias arest='~/webapps/appname_root/apache2/bin/restart'

# Server and HTTP error logs:
alias herr='tail -f -n 500 ~/logs/frontend/error_appname.log'
alias serr='tail -f -n 500 ~/logs/user/error_appname_root.log'

… and reload your profile by sourcing it.

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