Solved: Environment for node.js - Page 2

Report Inappropriate Content · 07-24-2015 01:02 PM

It is possible to set environment variables and arguments for node.js scripts in the ScriptTarget tag. It also appears that some environment variables may already be defined, but I cannot find any documentation on the node.js environment. What environment variables are set when a node.js script starts running? Is it possible to determine the environment (i.e., test/prod/...) and organization before a request comes into the node.js application?

ozanseymen

@Eric Hildum - As you may already know, this is the documentation page that talks about how to set environment variables and arguments to the node.js process: http://apigee.com/docs/api-services/content/understanding-edge-support-nodejs-modules#advancedscript...

<ScriptTarget>
        <ResourceURL>node://hello-world.js</ResourceURL>
        <EnvironmentVariables>
            <EnvironmentVariable name="NAME">VALUE</EnvironmentVariable>
        </EnvironmentVariables>
        <Arguments>
            <Argument>ARG</Argument>
        </Arguments>
</ScriptTarget>

Q1 - What environment variables are set when a node.js script starts running?

You can easily find this out with this node.js code:

console.log('environment variables: ' + JSON.stringify(process.env));

When I execute this in my free org, I get:

{
  "TERM": "xterm",
  "JAVA_HOME": "/usr/lib/jvm/java-1.7.0-openjdk.x86_64",
  "SHLVL": "3",
  "XFILESEARCHPATH": "/usr/dt/app-defaults/%L/Dt",
  "APIGEE_HOME": "/opt/apigee",
  "microkernel_overrideTokenFolder": "/opt/apigee/token",
  "working_dir": "/opt/apigee/apigee-1.0.0.974.5491b78.1507171825/bin",
  "microkernel_host": "rmp69apigee",
  "PWD": "/",
  "microkernel_overrideTokenDirs": "application region pod org host",
  "LOGNAME": "apigee",
  "_APIGEE_APP_ID": "V+/lh17zvLtIy1TWFLWYv2zZxvWDlvFgMFMcCjglDfM=",
  "_": "/usr/lib/jvm/java-1.7.0-openjdk.x86_64/bin/java",
  "microkernel_defaultTokenFolder": "/opt/apigee/apigee-1.0.0.974.5491b78.1507171825/token",
  "NLSPATH": "/usr/dt/lib/nls/msg/%L/%N.cat",
  "microkernel_timeout": "T60",
  "SHELL": "/bin/bash",
  "TMPDIR": "/tmp"
  "microkernel_hasMonetization": "false",
  "USE_TOKENIZED_CONFIG": "true",
  "microkernel_org": "default",
  "PATH": "/sbin:/usr/sbin:/bin:/usr/bin",
  "microkernel_application": "message-processor",
  "microkernel_installType": "cloud",
  "microkernel_instanceType": "c3.xlarge",
  "USER": "apigee",
  "HOME": "/home/apigee",
  "APIGEE_ORGANIZATION": "oseymen",
  "CONFIG_UTIL_HOME": "/opt/apigee/apigee-1.0.0.974.5491b78.1507171825/bin",
  "microkernel_pod": "rea1gw012",
  "APIGEE_ENVIRONMENT": "test",
  "microkernel_defaultTokenDirs": "application installType:application instanceType timeout",
  "microkernel_region": "us-east-1",
  "LANG": "en_US.UTF-8"
}

Q2 - Is it possible to determine the environment (i.e., test/prod/...) and organization before a request comes into the node.js application?

I am not 100% on what you mean by "before request comes into node.js application", but here are a couple of pointers:

Using apigee-access module in node.js and read the value of apigee variable "environment.name" and "organization.name"
Reading environment variable "APIGEE_ENVIRONMENT" and "APIGEE_ORGANIZATION" in node.js - see above JSON object.
Passing the whatever you want as an environment variable in ScriptTarget and reading it in node.js
Passing the whatever you want as an argument and reading it from process.argv.
Passing the whatever you want as a header/qs, etc from Apigee policies to node.js and reading it from there.

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