Mixing
How can I run DB migrations with Flynn without distubring running code?
Given an existing Ruby on Rails application running on Flynn, how can I deploy a new version of the application that has schema changes (for the sake of the question, let's say they take a 10 seconds to execute) without any DB errors while serving requests until the schema change is complete?
Heroku solves this with their Preboot feature, which is essentially what I'm looking for here, but any alternative scheme that works is fine.
Here's an example scenario with steps:
- List item
- Version 1 of application running with existing DB schema.
- Version 2 of application deploys with code relying on new tables
- Migrations are run and new tables are created
- Version 2 can now run as intended
How can I prevent requests from getting errors between steps 3 & 4, but still be able to deploy the schema changes and dependent code together?
flynn
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
add a comment |
Given an existing Ruby on Rails application running on Flynn, how can I deploy a new version of the application that has schema changes (for the sake of the question, let's say they take a 10 seconds to execute) without any DB errors while serving requests until the schema change is complete?
Heroku solves this with their Preboot feature, which is essentially what I'm looking for here, but any alternative scheme that works is fine.
Here's an example scenario with steps:
- List item
- Version 1 of application running with existing DB schema.
- Version 2 of application deploys with code relying on new tables
- Migrations are run and new tables are created
- Version 2 can now run as intended
How can I prevent requests from getting errors between steps 3 & 4, but still be able to deploy the schema changes and dependent code together?
flynn
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
add a comment |
Given an existing Ruby on Rails application running on Flynn, how can I deploy a new version of the application that has schema changes (for the sake of the question, let's say they take a 10 seconds to execute) without any DB errors while serving requests until the schema change is complete?
Heroku solves this with their Preboot feature, which is essentially what I'm looking for here, but any alternative scheme that works is fine.
Here's an example scenario with steps:
- List item
- Version 1 of application running with existing DB schema.
- Version 2 of application deploys with code relying on new tables
- Migrations are run and new tables are created
- Version 2 can now run as intended
How can I prevent requests from getting errors between steps 3 & 4, but still be able to deploy the schema changes and dependent code together?
flynn
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
Given an existing Ruby on Rails application running on Flynn, how can I deploy a new version of the application that has schema changes (for the sake of the question, let's say they take a 10 seconds to execute) without any DB errors while serving requests until the schema change is complete?
Heroku solves this with their Preboot feature, which is essentially what I'm looking for here, but any alternative scheme that works is fine.
Here's an example scenario with steps:
- List item
- Version 1 of application running with existing DB schema.
- Version 2 of application deploys with code relying on new tables
- Migrations are run and new tables are created
- Version 2 can now run as intended
How can I prevent requests from getting errors between steps 3 & 4, but still be able to deploy the schema changes and dependent code together?
flynn
flynn
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
asked Nov 19 '18 at 20:15
user605331user605331
1,91532347
1,91532347
add a comment |
add a comment |
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