I feel foolish asking this question, but I cannot seem to get my local datastore to clear for a project using GAE. I've consulted the following SE questions:
How to delete all datastore in Google App Engine?
GAE - I can't clear datastore and the datastore is corrupted I believe
Google App Engine Launcher delete datastore
I've also looked at the docs, and the command seems very clear among them all. I can navigate to the folder where dev_appserver.py is located and then run
dev_appserver.py --clear_datastore=yes <myappname>
Yet, I keep getting an error stating No such file or directory for my app.
I'm certain I'm entering the right name for my app, because it matches the name in my app.yaml file, it matches the folder my project is in locally, and it matches the name of the project on the GAE Launcher.
My app's local files are in a directory that is completely separate from the GAE install location, if that makes any difference. I tried running the command in my app's directory and it gives me the same error.
The name contains dashes, could that be causing a problem? I realize that this is not a verifiable example, but I'm out of ideas.
Thanks to Dan for his help. As he pointed out, the dev_appserver.py --help command explains that the .yaml file should be put in the position of the app's name. This is the final command that worked for me (run from the same directory as the .yaml file) was
dev_appserver.py --clear_datastore=yes app.yaml
Also, it appears that this command has cleared the local datastore for all of my GAE projects. That was not a problem for me but, if someone else needs to preserve a project on the local datastore while clearing another one, then a slightly different command may be required.
Related
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.
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
As an experiment I attempted do deploy my "regular" (=vanilla create-application) grails-app to google app-engine.
Even though I have removed my repo locally, re-cloned to different folders etc I still get this message when I do a clean, or run-app or anything for that matter.
No Google AppEngine SDK specified. Either set APPENGINE_HOME in your environment or specify google.appengine.sdk in your grails-app/conf/BuildConfig.groovy file
Any ideas how to solve this?
I may have spoken too soon, I changed my app.name in application.properties and that solved it, I can't verify it but I guessing ivy-related (just a guess)
How can I customize the location of the datastore file while working with GAE/J.
The option --datastore_path doesn't seem to work with GAE/J.
And if it is possible, what option do I use in the maven-gae-plugin.
I assume you mean while running the dev app server locally. Try the --generated_dir option with <sdk>/bin/dev_appserver.sh:
--generated_dir=dir Set the directory where generated files are created.
The generated files include the local datastore file.
How to clear datastore in GoogleAppEngine.
I want to clear my development data to do a test again, but I can found a way to do that
If you are running from the commandline, use the --clear_datastore flag, e.g.,
dev_appserver.py --clear_datastore=yes app
Otherwise, if you're running it off the included GAE launcher, go into the settings of your app (double click it), and there should be a little checkbox that says "clear datastore on launch" under Launch Settings.
reference:
https://cloud.google.com/appengine/docs/python/tools/devserver#Python_Using_the_Datastore
dev_appserver.py --clear_datastore myapp
assuming by "development data", you mean the data in the dev server.
Simply use Administering Your Datastore (Experimental)
Some Other ways
App Engine: How to "reset" the datastore?
Delete all data for a kind in Google App Engine
Interactive console is also a great way.
For Java, the following information can be seen in Using the Datastore - Clearing the Datastore at the end of the page (as of 2013/05/10):
The development web server uses a local version of the Datastore for testing your application, using local files. The data persists as long as the temporary files exist, and the web server does not reset these files unless you ask it to do so.
The file is named local_db.bin, and it is created in your application's WAR directory, in the WEB-INF/appengine-generated/ directory. To clear the Datastore, delete this file.
So, stop your server, delete the file, and restart it up.
On your local machine you can go to : http://localhost:8080/_ah/admin/datastore