DC/OS Command Line Interface

The DC/OS Command Line Interface (CLI) is a cross-platform command line utility that provides a user-friendly yet powerful way to manage DC/OS clusters.

Installation and usage

If you're a user of DC/OS, please follow the installation instructions. Otherwise, follow the instructions below to set up your development environment.

Detailed help and usage information is available through the dcos help command and for specific subcommands through dcos <subcommand> --help.

Additional documentation for the CLI and for the DC/OS in general is available in the DC/OS docs.

Parsing CLI output

The CLI outputs either whitespace delimited tables which can be processed by all of your favourite Unix/Linux tools like sed, awk and grep, or text formatted as JSON when using the --json flag.

If using JSON, you can combine it with the powerful jq utility. The example below installs every package available in the DC/OS repository:

dcos package search --json | jq '.[0].packages[].name' | xargs -L 1 dcos package install --yes

Note: The CLI output supports UTF-8 encoding for stdout and stderr. Please follow your platform's instructions on how to do that.

Development dependencies

1. git must be installed to download the source code for the DC/OS CLI.
2. python version 3.5.x must be installed.
3. If make env fails you may be missing required dependencies for cryptography. See here for more information or use our dockerfile that builds with all necessary dependencies.
4. virtualenv must be installed and on the system path in order to install legacy subcommands. New subcommands are packaged as platform specific executable or platform specific Zip archives.
5. win-bash must be installed if you are running this in Windows in order to run setup scripts from the Makefiles.

Basic setup

1. Make sure you meet requirements for installing packages

2. Clone git repo for the dcos cli:

   git clone [email protected]:dcos/dcos-core-cli.git
   

3. Change directory to the repo directory:

   cd dcos-core-cli
   

Setup virtualenv for the dcos project

    cd python/lib/dcos
    make env

Setup virtualenv for the dcoscli project

    cd python/lib/dcoscli
    make env

Using the DC/OS CLI

1. From the dcoscli directory, source the virtualenv activation script to add the dcos command line interface to your PATH:

   source env/bin/activate
   

2. Configure the CLI, changing the values below as appropriate for your local installation of DC/OS:

   dcos cluster setup http://dcos-ea-1234.us-west-2.elb.amazonaws.com
   

3. Get started by calling the DC/OS CLI help:

   dcos help
   

Running tests

Setup

Before you can run the DC/OS CLI integration tests, you need to get a cluster up and running to test against. Currently, the test suite only supports testing against Enterprise DC/OS.

Given these constraints, the easiest way to launch a cluster with these capabilities is to use dcos-launch with the configuration listed below:

launch_config_version: 1
deployment_name: ${CLI_TEST_DEPLOYMENT_NAME}
installer_url: ${CLI_TEST_INSTALLER_URL}
platform: aws
provider: onprem
aws_region: us-west-2
aws_key_name: ${CLI_TEST_SSH_KEY_NAME}
ssh_private_key_filename: ${CLI_TEST_SSH_KEY_PATH}
os_name: cent-os-7
instance_type: m4.large
num_masters: 1
num_private_agents: 1
num_public_agents: 1
dcos_config:
    cluster_name: DC/OS CLI Integration Tests
    resolvers:
        - 10.10.0.2
    dns_search: us-west-2.compute.internal
    master_discovery: static

Where CLI_TEST_DEPLOYMENT_NAME is a custom name set by the user, CLI_TEST_INSTALLER_URL is the URL of a dcos_generate_config.ee.sh script for the desired version of DC/OS to test against, CLI_TEST_SSH_KEY_NAME is the name of an AWS key to install on the machines deployed by the installer, and CLI_TEST_SSH_KEY_PATH is a local path to the key named by CLI_TEST_SSH_KEY_NAME.

Unfortunately, the URL to download dcos_generate_config.ee.sh scripts for Enterprise DC/OS is not publicly available. For Mesosphere employees the URL to the latest master build of Enterprise DC/OS can be found here:

https://mesosphere.onelogin.com/notes/45791

For everyone else, you can still run the integration test suite against a non-enterprise cluster (i.e. Community DC/OS), but please be aware that running the full test suite will fail. See the section below on Running to see how to limit the set of tests run by the integration test suite.

The URL to the latest master build of Community DC/OS is:

https://downloads.dcos.io/dcos/testing/master/dcos_generate_config.sh

Initialization

Once you have your cluster up and running you need to modify your environment in order to run the tests. A simple script you can use to modify your environment can be seen below.

NOTE: Make sure you run this script from your Python dcos-core-cli directory.

NOTE: You will need to customize the first few lines in the script appropriate for your setup. A description of the variables you need to modify can be found below the script

CLI_TEST_DCOS_URL: Holds the URL or IP address of the cluster you are testing against. If you used dcos-launch to launch the cluster, you can get the IP of the cluster by running dcos-launch describe.

CLI_TEST_SSH_KEY_PATH: Points to a private key file used to ssh into nodes on your cluster. If you used dcos-launch to launch the cluster, then this should point to the same file used in your dcos-launch config. This is used by the node integration tests.

CLI_TEST_SSH_USER: Holds the username used to ssh into nodes on your cluster. If you used dcos-launch with the configuration listed above to launch your cluster, then you must set this to centos. This is used by the node integration tests.

Running

Now that your environment is set up appropriately, we can start running the tests. We have tests both in the dcos package (python/lib/dcos) and in the dcoscli package (python/lib/dcoscli).

When running the tests, change your current directory to one of those two locations and follow the instructions below.

NOTE: You must have your virtualenv deactivated in order to run the tests via the commands below. This is very important and often a point of much confusion.

If you want to run the full test suite simply run:

make test

If you want to run only unit tests that match a specific pattern run:

env/bin/tox -e py35-unit /<test-file>.py -- -k <test-pattern>

If you want to run only integration tests that match a specific pattern run:

env/bin/tox -e py35-integration /<test-file>.py -- -k <test-pattern>

Other Useful Commands

1. List all of the supported test environments:

   env/bin/tox --listenvs
   

2. Run a specific set of tests:

   env/bin/tox -e <testenv>
   

3. Run a specific unit test module:

   env/bin/tox -e py35-unit /<test-file>.py
   

4. Run a specific integration test module:

   env/bin/tox -e py35-integration /<test-file>.py
   

Releasing

Releasing a new version of the DC/OS CLI is only possible through an automated TeamCity build which is triggered automatically when a new tag is added.

The tag is used as the version number and must adhere to the conventional PEP-440 version scheme.

The automated build starts up three jobs to build the platform dependent executables (for Windows, macOS, and Linux).

The executables are pushed to s3 and available at https://downloads.dcos.io/binaries/cli/<platform>/x86-64/<tag>/dcos.