Robot Framework using Python 3.6.8 on Ubuntu 18.04.2 LTS docker container

I still have not been able to get this to work with the ChromeDriver direct, however, I was able to get this to work using selenium grid:

https://selenium-release.storage.googleapis.com/3.141/selenium-server-standalone-3.141.59.jar

I started a Hub (in a container) and then a node directly on the container running the test and it worked. I'm still working on building the container that runs the node (it's not working as a separate container though...I must need to add some configurations). Below is the robot framework test suite using a remote chrome driver:

*** Settings ***Documentation...    This is a simple robot test to open a browser and check the title of a given website.Library    CollectionsLibrary    DateTimeLibrary    DialogsLibrary    OperatingSystemLibrary    SeleniumLibraryLibrary    StringLibrary    RequestsLibrarySuite Setup    Setup Environment and Open BrowserSuite Teardown    Close All Browsers*** Variables ***${BROWSER}      HeadlessChrome${SITE_URL}     https://www.google.com*** Test Cases ***Title Test    Title Should Be    Google*** Keywords ***Open Chrome Browser To URL    [Documentation]    Open Chrome browser and navigate to URL with browser options set    [Tags]  open_chrome_browser    ${chromeOptions}    Evaluate    sys.modules['selenium.webdriver'].ChromeOptions()    sys, selenium.webdriver    Call Method    ${chromeOptions}    add_argument    --headless    ${ws}=    Set Variable    window-size=1920, 1080    Call Method    ${chromeOptions}    add_argument    ${ws}    Call Method    ${chromeOptions}    add_argument    --disable-extensions    Call Method    ${chromeOptions}    add_argument    --disable-gpu    Call Method    ${chromeOptions}    add_argument    --disable-dev-shm-usage    Call Method    ${chromeOptions}    add_argument    --ignore-certificate-errors    ${remoteOptions}=    Call Method    ${chromeOptions}    to_capabilities    Create Webdriver    Remote   command_executor=http://<IP ADDR OF HUB>:4444/wd/hub    desired_capabilities=${remoteOptions}    Go To    ${SITE_URL}    Maximize Browser WindowBrowser timeout and speed    [Documentation]    ...    Set browser timeout and speed    Set Selenium Timeout   30s    Set Selenium Speed   0sSetup Environment and Open Browser    [Documentation]    ...    This keyword will establish the environment variables and open a browser    [Tags]    simple_test    Open Chrome Browser To URL    Browser timeout and speed

Now to figure out how to run the node in a container...

After a bit more research, I just used the public Selenium Grid 3 hub and nodes to solve my issue.

https://github.com/SeleniumHQ/docker-selenium/tree/selenium-3/Hub