So it seems from a few SO questions I've seen that this is a problem among other users. Recently one of our head dev's left and I inherited a lot of his projects. One of which, is a website that what seems like lives on an app engine from google cloud platforms. From the App Engine documentation, to download source code you use the appcfg.py download_app command. Which I did, however the only results I get back from that call is:
Fetching file list...
Fetching files...
And then it just ends. No error message or any kind of message at all, and of course, it did not download the source code into the output dir I specified.
Scratching my head and looking at various SO posts, someone mentioned something about going into the google cloud vm directly and doing the same command, and to my surprise finding the same exact behavior that I did in my local terminal.
This made me realize it must be something else at play. I took a look at my versions tab in the App Engine dashboard on GCP. I see my instance running, it correctly says Serving and if I click the link it brings me to the website which loads fine. However, under Size it says 0 B which made me think perhaps this is why the download_app isn't downloading anything, because the version is 0 B?
What I'm trying to figure out is why it says 0 B for the version, when clearly the site runs fine and how I can get the source code for this. Here's a screenshot for reference
And screenshot of my terminal (local). Obviously I omitted the -A and -V flags, but they are correctly set and if I purposely make them incorrect I do indeed get an error message.
EDIT
Just so everyone is aware, I also made sure my user had the correct permissions. Owner, App Engine Owner... and some others. I don't think that's the problem.
When you deploy an App Engine Flexible application, the source code is uploaded to Cloud Storage on your project in a bucket named staging.<project-id>.appspot.com. You can navigate in this bucket and download the source code for a specific version as a .tar file.
Alternatively, you can find the exact Cloud Storage URL for your source code by going to Dev Console > Container Registry > Build History and select the build for your version. You'll find the link to your source code under Build Information.
One thing to note however is that the staging... bucket is created by default with a Lifecycle rule that deletes files older than 15 days automatically. You can delete this rule if you want so that all versions' source code is kept indefinitely.
In your case I believe that may not have helped since files may have been deleted already but it's worth knowing you can get the source code from there (source code isn't pushed to Source Repository by default, your developer had to configure it manually).
Posting this since none of the listed methods on the web didn't take me to the code (by June 2021)
Note: appcfg.py is deprecated by Google
You could try accessing your source code through;
Google Cloud Platform > Debugger > choosing the version of the
Application from combo at top.
This will list the files of that version on the left pane. There is no way to download code automatically but you can copy-paste the code.
Advice: Push your code to a Git repository to avoid this hassle next time.
Hope you will find this helpful.
In the developer console you can select the respective project and check:
on the Services page - which services, AKA modules - as they used to be (and still are) called in various places, you app has deployed
on the Versions page - which versions for each of the services are deployed
This information is what appcfg.py download_app expects. See also:
the various appcfg.py options using its --help flag
How do I download a specific service's source code off of AppEngine?
You can also access the deployed source code live (if everything else fails it could still be a last resort method to get the code, but tedious), see my answer to Google Cloud DataStore automatic indexing
Update:
I just now noticed in your screenshot that it's a flexible environment app. The appcfg.py docs are in the standard environment section, I suspect it's not applicable to the flexible environment, for which what's deployed is actually a docker image built during the deployment operation. From Deploying your application:
Deploy your app to App Engine using the gcloud app deploy
command. This command automatically builds a container image by using
the Container Builder service and then deploys that image to the
App Engine flexible environment. The container will include any local
modifications that you've made to the runtime image.
It might be possible to access the code on the actual GCE instance running the app, by connecting to the running instance and starting a shell in your app container, see Connecting to the instance
Related
I'm using Google App Engine and I've followed the instruction to setup Google Debugger as show here:
https://cloud.google.com/debugger/docs/setup/nodejs
My project is written in Node.js and I'm starting the service with this line:
require('#google-cloud/debug-agent').start({serviceContext: {enableCanary: true}});
I've also generated the source-context file.
When I go to the debugger console (https://console.cloud.google.com/debug) I see the green tick about the debug agent running but nothing is displayed on the left side, under "Deployed files".
Any ideas?
What you're seeing is intended behavior. Deployments to App Engine Standard will show the source code as the source files are included on deployment and not using a Docker container while deployments to App Engine Flex are using a Docker container, which currently need not to include the source files, hence why you need a source context information which is generated from a Git Repository. For more information about differences of standard and flex, please see Choose an App Engine environment.
For App Engine Flex app source code to appear on Cloud Debugger, it must be located on a remote code hosting provider. Make sure that you follow the Selecting source code automatically properly. Your main source code (js, yaml, and source-context.json) should be in the root directory of the repository as shown below.
App-directory/
main.py
app.yaml
source-context.json
I've successfully deployed sample application using Github showing the source codes on the left side as shown below.
Some important notes:
When using "Cloud Source Repositories" or "GitHub" or any of the other remote code hosting options, one must take some care:
Changes to the source file must be committed to version control before running gcloud debug source gen-repo-info-file.
gcloud debug source gen-repo-info must be run before deploying the App.
Commits must have been pushed to Cloud Source Repository/GitHub/etc before running Cloud Debugger.
Access must have been granted to the repo to the Cloud Debugger application.
Always redeploy application when there are changes to the repository or source code.
I've setup Google App Engine to run my AdonisJS API for my website. I update the code using the CLI for google cloud services ("gcloud app deploy"). I get a success message from the terminal, and I have checked both the cloud build and version number, and both are the most recent deployment. However, when I try to use my website, I get an error due to the API using old code and trying to access table columns from my database that no longer exist. I have downloaded the most recent cloud build file and checked the codebase within it and the updated code is there. I have also tried deploying multiple times, and it still is using the old code. Does anyone know why this is happening and/or how to fix this?
If you need more information, let me know. Thanks
ANSWER:
Fixed this a while ago, but wanted to update here just in case others ran into this. I discovered that when deploying to GAE through the command line, my build command wasn't running prior to the deploy since my script had an error, so it was uploading updated code, but not an updated build. So just make sure to run the build command prior to uploading to GAE and everything should work.
In console.cloud.google.com, go to your GAE project and check which version of your project is running I.e. which one is receiving traffic
Clear your cache.
I am new at Google Cloud and I would like to know if there is a way to edit only one file inside of an App Engine application.
This is my problem:
I am migrating from a normal hosting to google cloud and I am having some problems with my PHP code, I am using the same version like locally but I am getting some error in the cloud, so I need to change 1 or 2 files, update them and test the app, so is there any way to change that file directly on the server? To deploy i am using this command:
gcloud app deploy
But it takes about 10 minutes to deploy so is too slow my testing. Any suggestions?
Thanks.
Leandro
For the standard environment the answer is no, you need to deploy a new version of the app to modify a file. So the advice would be - make the most of testing your app locally. See somehow related Google AppEngine - updating my webapp after deploy
For the flexible environment (possibly your case as you mentioned 10 min deployment time, typical for the flexible env) there might be stuff to try, but tedious, see Google AppEngine - updating my webapp after deploy
There is a way to edit directly into the instance.
ssh into your instance and then start shell on your running docker as guided in this url. https://cloud.google.com/appengine/docs/flexible/python/debugging-an-instance
After login you can see your php source files.
Basically you will not have any editor. So do
$> apt update
$> apt install nano
$> nano index.php // edit your files
you can see something like
There is no way to change 1-2 files on the server so that it would update the app. Deployment is the process of updating the live app. If you want some changes to be made to the app that is already deployed, you will have to redeploy - there is no way around it. This is why it is recommended to test the app locally before (re)deploying so that you are sure everything is working fine.
If locally everything works fine and issues start happening only when the app is deployed, this should be investigated further and I would advise you to open a new question and provide as much details as possible regarding the problems, including full stack trace of the error, related code parts, your app.yaml contents as well.
I've been following this tutorial: https://cloud.google.com/solutions/mobile/mobile-firebase-app-engine-flexible
I reached the step titled "Deploying the service to the App Engine flexible environment", and initially could not get it to deploy due to dm:true being deprecated. Changing <dm>true</dm> to <env>flex</env> in "appengine-web.xml" fixed this, and it now appears in the App Engine console as "serving". However, when I go to access the printLogs URL as instructed in the tutorial (or any URL connected to the project for that matter) I run into a 404 error. I am deploying from Windows 10 through the command prompt, and have installed everything instructed by the tutorial. I cannot figure out what is causing the 404 despite being told that it is running correctly.
You can go to the version in cloud platform and check the logs - it might tell you something.
However, I can tell you from experience that a lot of those projects are out of date and you can get all sorts of errors without changing a single line of code and following the instructions exactly. I've some of them say that they deploy, only to have errors just like the one you are describing.
It is very likely that you are NOT doing something wrong - check out some of the other projects and look specifically at pom.xml (or build.gradle) and app.yaml. See which versions of libraries they are including, and look for any differences. Try deploying a very limited project, and then build upwards and see what is breaking the code.
I have a website that is currently running under GAE... unfortunately, I, nor anyone on the team, does not have access the local environment that it was created from.... Is it possible to create a local environment or at least get a copy of the application files and database from an existing GAE installation?
What you need is the application source code, not the "local environment".
Ideally this source code would be on a version control system (ie GIT,SVN), Google cloud platform provides free GIT repositories for your projects so you might try looking there first. There's also a tool for both Java and python that allow you to download the source of a deployed version, provided you are authenticated as either the dev who uploaded it or a project owner. EDIT: as stated by Dan Cornilescu this feature can be disabled.
As for the database info there's plenty of tools available to "export" your GAE datastore info, just consider for your project that it might be easier to do the queries manually than actually implementing this tools.
Thanks for help... But unfortunately, this code is not in GIT. Furthermore,
being new to Google hosting, I wasn't clear on my setup... My web instance is actually running within Compute Engine not Application Engine. Be that as it may, with some additional search, I was first able to find out how to browse my filesystem by accessing the VM Instances menu option under the Compute Engine section of the Google Cloud Platform interface. On the VM Instances page, it will show your instance and an option to the left side of the instance to connect with a drop down box that will allow you to open a browser window that shows the instance's file system. In addition to this, I found this link https://www.youtube.com/watch?v=9ssfE6ODpak that shows how to configure Filezila FTP client to access your server instance - very helpful. From there, I was able to download all of my site files from the var/www directory. Now, onto extracting my data... Thanks again!