Authorization using pxctl


Overview

This document outlines how to interact with an authorization-enabled Portworx cluster. The main way to do it is by using the pxctl context command. Also, you can integrate with an OIDC provided token or generate self-signed tokens through pxctl. See the generate self-signed tokens page for more details.

Contexts

Portworx stores the following locally to your home directory, allowing you to switch between configurations with a few commands:

  • contexts
  • associated clusters
  • privileges
  • tokens

  • contexts,

  • associated clusters,

  • privileges, and

  • tokens

local to your home directory. This allows you to switch between these configurations with a few commands.

Since Portworx stores the context locally on each node, you must create your context on the node you’re working on.

Run the pxctl context command with the --help flag to list the available subcommands and flags:

/opt/pwx/bin/pxctl context --help
Portworx pxctl context commands for setting authentication and connection info

Usage:
  pxctl context [flags]
  pxctl context [command]

Available Commands:
  create      create a context
  delete      delete a context
  list        list all contexts
  set         set the current context
  unset       unset the current context

Create a context

You can create a new context by running the pxctl context create command and passing it the following arguments:

  • the name of the context
  • --token with the token Portworx must use for this context
  • --endpoint with the endpoint for this conext

Here’s an example of how you can create a new context:

pxctl context create <context> --token <token> --endpoint <endpoint>

Delete a context

To delete a context, run the pxctl context delete command with the name of the context as in the following example:

pxctl context delete <context>

List your contexts

Portworx stores your contexts in the ~/.pxctl/contextconfig directory. Use the pxctl context list command to view them:

pxctl context list
contextconfig:
  current: user
  configurations:
  - context: user
    token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImpzdGV2ZW5zQHBvcnR3b3J4LmNvbSIsImV4cCI6MTU1MzcyNTMyMSwiZ3JvdXBzIjpbInB4LWVuZ2luZWVyaW5nIiwia3ViZXJuZXRlcy1jc2kiXSwiaWF0IjoxNTUzNjM4OTIxLCJpc3MiOiJwb3J0d29yeC5jb20iLCJuYW1lIjoiSmltIFN0ZXZlbnMiLCJyb2xlcyI6WyJzeXN0ZW0udXNlciJdLCJzdWIiOiJqc3RldmVuc0Bwb3J0d29yeC5jb20vanN0ZXZlbnMifQ.pZDbCIL7ldcImvIaNSjk18Ah3LqxX63MV378NiauRwk
    identity:
      subject: jstevens@portworx.com/jstevens
      name: Jim Stevens
      email: jstevens@portworx.com
    endpoint: http://localhost:9001

Select the current context

Once you’ve created your contexts, use the pxctl context command to switch between them. Under the hood, Portworx reads your current context and then uses the associated token for all commands.

Alternatively, you can use the global --context flag to run a single command with a given context.

Use the following command to set the current context:

pxctl context set <context>

Unset the current context with:

pxctl context unset

Generate tokens

Portworx supports two methods of authorization:

  • OIDC and
  • self-signed.

To generate a token through your OIDC provider, see the documentation on generating bearer tokens on the website of the provider. The following links direct you to the most commonly used OIDC providers:

Note that, for self-signed tokens, you can use your own JWT compliant application. Furthermore, for convenience, the pxctl CLI tool provides a command for generating tokens. See the self-signed tokens page for more details.

How to debug token issues

This section explains how to debug common token issues.

Permission denied issues

Problem symptom: You see an unexpected Permission denied or other auth-related error.

Find the root cause: Take a look into your token permissions. Decode and verify your token with a JWT token decoding tool such as jwt.io

The jwt.io debugger does client-side validation and debugging. It does not store your token anywhere.

Protocol error

Problem symptom: you see an error message similar to rpc error: code = Internal desc = stream terminated by RST_STREAM with error code: PROTOCOL_ERROR.

Find the root cause: Make sure your token doesn’t contain a newline character. The gRPC/http2 protocol doesn’t allow newline characters. that your token does not accidentally contain a newline character. This is due to gRPC/http2 not allowing newline characters.

  • For information about enabling and managing Portworx authorization through Kubernetes, refer to the Authorization page.


Last edited: Thursday, Jan 9, 2020