{"id":2433,"date":"2023-07-10T01:41:21","date_gmt":"2023-07-10T05:41:21","guid":{"rendered":"https:\/\/www.rexfeng.com\/blog\/?p=2433"},"modified":"2023-07-10T02:11:34","modified_gmt":"2023-07-10T06:11:34","slug":"updating-web-app-from-rails-4-to-rails-7","status":"publish","type":"post","link":"https:\/\/www.rexfeng.com\/blog\/2023\/07\/updating-web-app-from-rails-4-to-rails-7\/","title":{"rendered":"Updating web app from Rails 4 to Rails 7"},"content":{"rendered":"\n

A few months ago, certbot<\/a> gave me the warning “Your system is not supported by certbot-auto anymore.”. With my Rails 4 app running on old Ubuntu 14.04, it was time to update the app & environment.<\/p>\n\n\n\n

Since I’m using Digital Ocean’s droplets, it was easy to spin up a new droplet, setup the new droplet, and then destroy the old droplet. This is way better than operating in situ.<\/p>\n\n\n\n

This blog post will provide a high level overview of update steps & pitfalls encountered.<\/p>\n\n\n\n

    \n
  1. Spin up a Ruby on Rails (v7.0.4.2, OS Ubuntu 22.04) droplet https:\/\/marketplace.digitalocean.com\/apps\/ruby-on-rails<\/a> This also involved setting up a SSH key to access the new droplet server.

    <\/li>\n\n\n\n
  2. Exfiltrate the example Rails 7 app from the server to my local machine scp -r root@{SERVER_IP}:\/home\/rails\/example .<\/code>
    <\/li>\n
    \n\n\n\n
  3. Create a new private GitHub repo for this example Rails 7 app

    <\/li>\n\n\n\n
  4. Run the new example Rails 7 app locally This step should be super simple, but it was not. Getting RVM to run Ruby 3.2.0 with OpenSSL was not trivial on my Intel Mac. Here’s what I ran to setup Ruby 3.2.0 locally:

    sudo -i <\/code>
    cd \/usr\/local\/src <\/code>
    curl -O https:\/\/www.openssl.org\/source\/openssl-1.0.2t.tar.gz <\/code>
    tar xzf openssl-1.0.2t.tar.gz <\/code>
    cd openssl-1.0.2t <\/code>
    .\/Configure darwin64-x86_64-cc <\/code>
    make <\/code>
    make install <\/code>

    rvm reinstall 3.2.0 --with-openssl-dir=\/usr\/local\/ssl<\/code>

    <\/li>\n\n\n\n
  5. In the new Rails 7 app, I moved my psql DB migrations over by hand. I copied the files and had to update the ActiveRecord::Migration<\/code> with ActiveRecord::Migration[7.0]<\/code>.

    <\/li>\n\n\n\n
  6. Draw the rest of the owl. I had to port lots of Rails files over from my Rails 4 to the target Rails 7 app.

    I ran into an issue with a model validation callback. To fix my issue, I created a migration to add uniqueness validation at the postgres layer and removed the uniqueness<\/code> check in my model.

    This also include various site fixes. Such as Open Street Map tiles, using 3rd party APIs, and Font Awesome icons.

    <\/li>\n\n\n\n
  7. Setup deployment to the server using Capistrano.

    Setting up Capistrano with Puma on Digital Ocean was not trivial at all. I followed this guide by Matthew Hoelter     https:\/\/www.matthewhoelter.com\/2020\/11\/10\/deploying-ruby-on-rails-for-ubuntu-2004.html<\/a>

    In my config\/deploy.rb file, I had to add this set :branch, :main<\/code>

    In my root Capfile, I had to use install_plugin Capistrano::Puma::Systemd<\/code> due to using Puma 5.6.5.

    After a ton of trial and error, I had setup my nginx config at \/etc\/nginx\/sites-available\/rails<\/code>.

    There was a ton of issues with the .sock file from Puma not getting generated.

    Setting up the secret_key_base<\/code> is a newer Rails convention. Luckily Matthew’s blog post goes into detail on how to set it up in \/etc\/environment<\/code>

    Using systemctl<\/code>, I got puma setup to run the command bundle exec puma -C \/home\/rails\/apps\/[APP_NAME]\/shared\/puma.rb<\/code>.

    Also, due to running on Digital Ocean, I had to update permissions for the rails user. cd \/home; chmod o=rx rails<\/code>. See Stack Overflow for details     https:\/\/stackoverflow.com\/questions\/70028324\/nginx-permission-denied-accessing-puma-socket-that-does-exist-in-the-correct-loc<\/a> Without running this, I was getting a 502 (Bad Gateway) error, even though everything else was setup. I can see traffic in my nginx.access.log, but I was still getting the 502 (before running this command).

    <\/li>\n\n\n\n
  8. Move psql data over. This step is going to vary a lot on your setup. I was able to run pg_dump<\/code> to export my data and import data using psql APP_NAME_production < latest_pg_dump.sql<\/code>.

    <\/li>\n\n\n\n
  9. Update A record. In order to point my domain to my new droplet, I went into Digital Ocean and updated the A record from my old IP to my new IP. This is going to vary depending who you’re using for domain names.

    <\/li>\n\n\n\n
  10. Run certbot. Running certbot for SSL was super easy. https:\/\/certbot.eff.org\/instructions?ws=nginx&os=ubuntufocal<\/a>

    <\/li>\n\n\n\n
  11. Destroy old droplet. When you’ve verified everything is working with your new Rails 7 app, you can destroy the old droplet in Digital Ocean.<\/li>\n<\/ol>\n\n\n\n

    My app, GeoGraph<\/a>, is now running on Rails 7 and lets anyone bookmark their location<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

    A few months ago, certbot gave me the warning “Your system is not supported by certbot-auto anymore.”. With my Rails 4 app running on old Ubuntu 14.04, it was time to update the app & environment. Since I’m using Digital Ocean’s droplets, it was easy to spin up a new droplet, setup the new droplet, […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1029],"tags":[1498,1501,1504,1505,1506,1094,1499],"class_list":["post-2433","post","type-post","status-publish","format-standard","hentry","category-programming","tag-digitalocean","tag-droplet","tag-postgres","tag-psql","tag-puma","tag-rails","tag-rails7"],"_links":{"self":[{"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/posts\/2433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/comments?post=2433"}],"version-history":[{"count":14,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/posts\/2433\/revisions"}],"predecessor-version":[{"id":2448,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/posts\/2433\/revisions\/2448"}],"wp:attachment":[{"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/media?parent=2433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/categories?post=2433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rexfeng.com\/blog\/wp-json\/wp\/v2\/tags?post=2433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}