gcloud crashed (SSLHandshakeError) in gcloud app deploy

Question

Unable to deploy my app as I started getting below error since today morning. I have tried gcloud info --run-diagnostics and gcloud components reinstall without much help.

I tried to deploy it using the old Google App Engine Launcher for Windows but faced the same error. Earlier it worked till yesterday night (IST) using gcloud. Please help!

I am on latest gcloud sdk and have updated all its components. I use Win10. I tried rebooting my laptop as well.

C:\gaurav\coding\python\myapp\myapp\dist>gcloud app deploy --project=myproject --version 1 --verbosity=info ./app.yaml
INFO: Refreshing access_token
ERROR: gcloud crashed (SSLHandshakeError): [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)

If you would like to report this issue, please run the following command:
  gcloud feedback

To check gcloud for common problems, please run the following command:
  gcloud info --run-diagnostics

C:\gaurav\coding\python\myapp\myapp\dist>

Diagnostics Output.

C:\gaurav\coding\python\myapp\myapp\dist> gcloud info --run-diagnostics
Network diagnostic detects and fixes local network connection issues.
Checking network connection...done.
ERROR: Reachability Check failed.
    Cannot reach https://accounts.google.com (SSLHandshakeError)
    Cannot reach https://cloudresourcemanager.googleapis.com/v1beta1/projects (SSLHandshakeError)
    Cannot reach https://www.googleapis.com/auth/cloud-platform (SSLHandshakeError)
Network connection problems may be due to proxy or firewall settings.


Do you have a network proxy you would like to set in gcloud (Y/n)?  n

ERROR: Network diagnostic (0/1 checks) failed.


C:\gaurav\coding\python\myapp\myapp\dist>

Although gcloud info --run-diagnostics complains that the three URLs are not reachable. I am able to open them from web browser.

Answer 1

I found that when using Fiddler (for viewing network traffic) and have decrypting https traffic enabled, then I received the SSLHandshakeError.

Stopping the tool (or choosing not to decrypt https traffic) and then running the gcloud resulted in success.

---

According to the comments, also a problem with other web debugging proxies such as Charles.

Answer 2

A problem in recent GAE and GCloud SDK versions is the presence of invalid SSH certificates, see, for example, Google App Engine SSL Certificate Error and issue 38338974.

You could try to use my suggested solution in the above-mentioned post and replace your SDK's certificate file with a valid one (will have to locate a good one for the gcloud SDK, my answer was for the GAE SDK).

You might also be able to use the gcloud config command to set the core custom_ca_certs_file configurable property to point to a file with up to date certificates, if you have one. I didn't try it, YMMV.

Answer 3

Upgrading to Python 2.7.9 on MacOS High Sierra solved the issue for me.