I want to create sketch-files dynamically and make them downloadable. I want to use sketch-constructor (here is an example that is working on my computer).
The code runs on heroku and the is even the console.log() of the fulfilled promise but i can't see neither the directory nor the sketchfile itself.
Thanks for your help!
The Heroku filesystem is ephemeral - that means that any changes to the filesystem whilst the dyno is running only last until that dyno is shut down or restarted. Each dyno boots with a clean copy of the filesystem from the most recent deploy.
In addition, under normal operations dynos will restart every day in a process known as "Cycling".
These two facts mean that the filesystem on Heroku is not suitable for persistent storage of data. In cases where you need to store file, you can use a dedicated file storage service such as AWS S3
However, the file will be created before it would be deleted, to confirm /check if the file on the file system, run the command .
heroku login
heroku run bash -a APPNAME
$ cd app
You can navigate the folder structure of the app
Related
I've googled this question a lot, but I haven't found right answer.
I've built an example app on NodeJS without Database connectivity. While developing I stored data in separate dir - "fakeDB", which contains "tests", "questions", "users" dirs and so on. In "tests" there are JSON files represent test data (a set of questions and answers).
When I deployed app on Heroku, tests stored correctly. When new test created, it is saved in "tests" dir and I have an access to it later.
But when I push a new commit to GH repo, tests that were created in Heroku, have been deleted.
How can I get copy of my Heroku repo on local machine?
NOTE: I've run heroku run bash and on ls it printed the list of local files, not from remote. Also, I've run git pull heroku to separate dir, but there were also a set of my previous files without created on Heroku.
Heroku's filesystem is ephemeral:
Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a temporary scratchpad, but no files that are written are visible to processes in any other dyno and any files written will be discarded the moment the dyno is stopped or restarted. For example, this occurs any time a dyno is replaced due to application deployment and approximately once a day as part of normal dyno management.
This means that you can't reliably create files and store them on the local filesystem. They aren't shared across dynos, and they periodically disappear. Furthermore, Heroku doesn't provide a mechanism for easily retrieving generated files.
The official recommendation is to use something like Amazon S3 for storing uploads, generated files, etc. Of course, depending on what's in your files a database might be a better fit.
I succeeded in uploading the node js container image to cloud run through docker and it works fine.
But now I have to upload some executable file in the root directory in binary form. (Probably, it would be nice to set basic file permissions as well) But I can't find a way to access it.. I know it's running on Debian 64-bit, right? How can I access the root folder?
Although it is technically possible to download/copy a file to a running Cloud Run instance, that action would need to take place on every cold start. Depending on how large the files are, you could run out of memory as file system changes are in-memory. Containers should be considered read-only file systems for most use cases except for temporary file storage during computation.
Cloud Run does not provide an interface to log in to an instance or remotely access files. The Docker exec type commands are not supported. That level of functionality would need to be provided by your application.
Instead, rebuild your container with updates/changes and redeploy.
I have a node.js app on heroku and I sometimes need to write files to heroku. Do you know how to see those files? Should I delete them after I am finished using them? I do not want to use memory for no reason.
Heroku (and other container based platforms) are different from traditional servers that you might be used to. It's worth bearing in mind that the Heroku filesystem is ephemeral - that means that any changes to the filesystem whilst the dyno is running only last until that dyno is shut down or restarted. Each dyno boots with a clean copy of the filesystem from the most recent deploy.
If you really needed to check a file on a running dyno (let's say to debug an issue with a file upload) it is possible to login using Heroku Exec https://devcenter.heroku.com/articles/exec
That said, you really shouldn't be using the filesystem for anything other than temporary files. Instead you should aim to use external services for persistent storage as described here: https://12factor.net/
For example, if you are handling file uploads you could try storing these on a service like Amazon S3.
I made a discordJs bot which saves data in a file.
Everything is hosted on Heroku and all works good.
But everyday, Heroku reset my file.
Why can't i keep my files everyday ?
Here's the full explanation from Heroku docs:
The Heroku filesystem is ephemeral - that means that any changes to
the filesystem whilst the dyno is running only last until that dyno is
shut down or restarted. Each dyno boots with a clean copy of the
filesystem from the most recent deploy. This is similar to how many
container based systems, such as Docker, operate.
In addition, under normal operations dynos will restart every day in a
process known as "Cycling".
These two facts mean that the filesystem on Heroku is not suitable for
persistent storage of data. In cases where you need to store data we
recommend using a database addon such as Postgres (for data) or a
dedicated file storage service such as AWS S3 (for static files). If
you don't want to set up an account with AWS to create an S3 bucket we
also have addons here that handle storage and processing of static
assets https://elements.heroku.com/addons
Source: https://help.heroku.com/K1PPS2WM/why-are-my-file-uploads-missing-deleted
I've googled this question a lot, but I haven't found right answer.
I've built an example app on NodeJS without Database connectivity. While developing I stored data in separate dir - "fakeDB", which contains "tests", "questions", "users" dirs and so on. In "tests" there are JSON files represent test data (a set of questions and answers).
When I deployed app on Heroku, tests stored correctly. When new test created, it is saved in "tests" dir and I have an access to it later.
But when I push a new commit to GH repo, tests that were created in Heroku, have been deleted.
How can I get copy of my Heroku repo on local machine?
NOTE: I've run heroku run bash and on ls it printed the list of local files, not from remote. Also, I've run git pull heroku to separate dir, but there were also a set of my previous files without created on Heroku.
Heroku's filesystem is ephemeral:
Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a temporary scratchpad, but no files that are written are visible to processes in any other dyno and any files written will be discarded the moment the dyno is stopped or restarted. For example, this occurs any time a dyno is replaced due to application deployment and approximately once a day as part of normal dyno management.
This means that you can't reliably create files and store them on the local filesystem. They aren't shared across dynos, and they periodically disappear. Furthermore, Heroku doesn't provide a mechanism for easily retrieving generated files.
The official recommendation is to use something like Amazon S3 for storing uploads, generated files, etc. Of course, depending on what's in your files a database might be a better fit.