cf-uaac installation

install cf-uaac on win10 is not forward straight, especially when there’s certain version of Ruby that doesn’t work well.

Basically you have to follow this wiki https://github.com/cloudfoundry/cf-uaac/wiki to install Ruby2.3.x, Ruby-devkit-mingw64/86-x and cf-uaac.

Welcome to the cf-uaac wiki!

Installation:

There has not been much information about what needs to be installed before you run gem install cf-uaac, so here are some pre-reqs.

Windows:

Download and install RubyGems (http://rubyinstaller.org/) (Download the installer AND the devkit) Installer: Run the installer. Make sure you tick all of the boxes regarding the PATH and stuff. DevKit: I would create a folder at C:/ruby-devkit. Extract the self-extracting file to that location. Open CMD (or whatever) and cd to your devkit location. Install it (“ruby dk.rb init” and “ruby dk.rb install”) Install cf-uaac (“gem install cf-uaac”)

Version 2.4.x Ruby doesn’t work when you do ruby install cf-uaac could be similar issues as https://github.com/rubygems/rubygems/issues/977

Predix also use cf-uaac.

To uninstall gem uninstall cf-uaac, to install specific version gem install cf-uaac -v 3.4.0 link

cf-uaac troubleshoot

When executing command uaac target https://*.predix-uaa.run.asv-pr.ice.predix.io, error “Use ‘–skip-ssl-validation’ to continue with an insecure target displays” occurs, the work around is set certificate before running scripts

set CERT_FILE_PATH="C:\Users\YDD9\Downloads\cmder\vendor\git-for-windows\usr\ssl\certs\ca-bundle.crt"

# For Mac users
export SSL_CERT_FILE="/Users/YDD9/Downloads/cmder/vendor/git-for-windows/usr/ssl/certs/ca-bundle.crt"

Further reading materials Predix forum solution and Predix advice for java

The best workaround I found is proposed by cloudfoundry doc:

uaac target --ca-cert "C:\Users\YDD9\Downloads\cmder\vendor\git-for-windows\usr\ssl\certs\ca-bundle.crt" https://*.predix-uaa.run.asv-pr.ice.predix.io

The idea is to find the path of your ca-bundle.crt file(normally in your gitbash path or similar bash path) and force UAAC command to use it.

clean up space

Delete all apps in a space

for i in $(cf a | tail -n+5 | awk '{print $1}'); do cf delete ${i} -f; done

Delete all services in a space

for i in $(cf s | tail -n+5 | awk '{print $1}'); do cf delete-service ${i} -f; done

Delete all routes in a space

cf routes | tail -n+4 | while read a b c; do cf delete-route "$c" --hostname "$b" -f; done
# or
cf routes | tail -n+4 | awk '{system("cf delete-route " $3" --hostname "$2" -f")}'

# or to be tested
# https://www.howtoforge.com/tutorial/linux-xargs-command/
cf routes | tail -n+4 | awk '{print $3" --hostname "$2" -f"}' | xargs -n 4 cf delete-route

push Python app in cloud with specific buildpack and Python version

  1. Check available buildpacks cf buildpacks 
    λ cf buildpacks
Getting buildpacks...

buildpack                    position   enabled   locked   filename
custom_node_buildpack        1          true      false
java_buildpack               2          true      false    java-buildpack-v3.6.zip
ruby_buildpack               3          true      false    ruby_buildpack-cached-v1.6.34.zip
nodejs_buildpack             4          true      false    nodejs_buildpack-cached-v1.5.29.zip
python_buildpack             5          true      false    python_buildpack-cached-v1.5.15.zip
predix_openresty_buildpack   6          true      false    staticfile_buildpack-cached-v1.2.1.zip
php_buildpack                7          true      false    php_buildpack-cached-v4.3.27.zip
staticfile_buildpack         8          true      false    staticfile_buildpack-cached-v1.3.17.zip
go_buildpack                 9          true      false    go_buildpack-cached-v1.7.18.zip
java_buildpack_large_heap    10         true      false    java_buildpack_large_heap.zip
matlab_buildpack_r2011b      11         true      false    matlab-buildpack-r2011b.zip
matlab_buildpack_r2012a      12         true      false    matlab-buildpack-r2012a.zip
matlab_buildpack_r2015a      13         true      false    matlab-buildpack-r2015a.zip
binary_buildpack             14         true      false    binary_buildpack-cached-v1.0.9.zip
java-buildpack               15         true      false    java-buildpack-v3.13.zip
java-offline-buildpack       16         true      false    java-buildpack-offline-v3.13.zip
python_minconda_buildpack    17         false     false    python_minconda_buildpack.zip
dotnet_core_buildpack        18         true      false    dotnet-core_buildpack-cached-v1.0.11.zip
  2. Push app with available python_buildpack or a specific buildpack in github https://forum.predix.io/articles/24714/how-to-specify-a-python-buildpack.html 
    cf push -b python_buildpack
    
# or specific version of buildpack
cf push -b https://github.com/cloudfoundry/python-buildpack.git#v1.5.20

# or specify buildpack in your manifest.yml
---
applications:
- name: latest-buildpack-demo
buildpack: https://github.com/cloudfoundry/buildpack-python.git#v1.5.20
  3. Using specific Python version https://forum.predix.io/articles/24718/how-to-specify-a-python-version-for-your-app.html
    To avoid surprise, you should use the same version of Python in development and in cloud. You need to have the corresponding buildpack then create a runtime.txt file in the same directory as manifest.yml.
    Examples of runtime.txt 
     python-3.6.1

    Examples of runtime.txt

     python-2.7.13

Python app in cloud with Flask

http://codehandbook.org/python-flask-web-application-on-ge-predix/
https://forum.predix.io/articles/24970/how-to-deploy-a-python-app-on-predix-in-under-10-m.html

Python app with own libraries

https://forum.predix.io/articles/24733/how-to-include-your-own-private-python-libraries-i.html

Python app with multiple .py files but only one as entry point

https://forum.predix.io/articles/28026/how-to-deploy-a-python-app-on-predix-consisting-of.html

|-- analytics
  |-- main.py
  |-- commonHelper.py
  |-- historyCalc.py
  |-- futureCalc.py
  |-- manifest.yml
  |-- requirements.txt
  |-- run.sh

If your analytics contains multiple .py files and only main.py is the entry point, you can create a run.sh file specify the entry.

echo "----------start of analytics----------"
python main.py

For requirements.txt you specify all modules used:

Flask
requests
pandas

Python app in cloud for different space

https://forum.predix.io/articles/27281/-how-to-deploy-application-on-multiple-spaces-deve.html

cf target -s <myspace>
cf push -f <manifest.yml for myspace> -p <dist for myspace>

Push Python app in Predix-Analytics-Framework CI/CD

https://forum.predix.io/articles/25018/how-to-analytics-framework-workflow-automation-usi.html

Access Predix Postgres service from local PgAdmin

Below example is done on postgres, the same should be applicable for all similar services. https://github.com/briangann/predix-chisel-postgres

Install chisel inside your space and linked to Postgres

#create predix postgres instance
cf create-service <postgres-db-service-name> <my-db-plan> <my-db-name>
#for example : cf create-service postgres shared-nr postgres-chisel

#clone repo & deploy the app
git clone https://github.com/briangann/predix-chisel-postgres.git
cd predix-chisel-postgres/app/
cf push --no-start

#start and bind chisel service to your existing Postgres database instance
cf start predix-chisel-postgres
cf bind-service <postgres-db-service-name> <my-db-name>
#for example : cf bind-service predix-chisel-postgres postgres-chisel
cf restage predix-chisel-postgres

download chisel and run it as client, remove --proxy http://myproxy.com:80 if you don’t have proxy.

chisel_windows_amd64.exe client -v --proxy http://myproxy.com:80 --keepalive 3s https://predix-chisel-postgres-dipteral-ksi.run.asv-pr.ice.predix.io 5000:10.131.54.5:5432