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Pulling the Agent Image
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docker image pull sosberlin/js7:agent-2-0-0-SNAPSHOT |
Alternatively, "plus" images are available that include a recent PowerShell environment and the JS7 - PowerShell Module:
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docker image pull sosberlin/js7:agent-2-0-0-SNAPSHOT-plus |
Running the Agent Container
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After pulling the Agent image you can run the container with a number of options like this:
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#!/bin/sh
docker run -dit --rm \
--user="$(id -u $USER):$(id -g $USER)" \
--hostname=js7-agent-primary \
--network=js7 \
--publish=16445:4445 \
--env="RUN_JS_JAVA_OPTIONS=-Xmx256m" \
--mount="type=volume,src=js7-agent-primary-var,dst=/var/sos-berlin.com/js7/agent/var_4445" \
--name js7-agent-primary \
sosberlin/js7:agent-2-0-0-SNAPSHOT |
Explanation:
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# example to map volumes to directories on the Docker host prior to running the Agent container
mkdir -p /home/sos/js7/js7-agent-primary/var
docker volume create --driver local --opt o=bind --opt type=none --opt device="/home/sos/js7/js7-agent-primary/var" js7-agent-primary-var |
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"plus" Image
Image names suffixed with "plus" include a recent PowerShell environment and the JS7 - PowerShell Module. This fact increases the image size and not all users might feel the need to use PowerShell. At the same time the JS7 PowerShell Module allows simplified use of the JS7 - REST Web Service API.
PowerShell Profile
By default the "plus" Agent image creates the following PowerShell profile inside the container with the path /home/jobscheduler/.config/powershell/Microsoft.PowerShell_profile.ps1:
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- Readline options specify colors used for better visibility of the prompt when directly invoking PowerShell inside a container.
- A profile assumed inside the Agent's
configdirectory is executed if applicable.
Running PowerShell Commands inside the Container
To try out a "plus" Agent container you can use the following sequence of commands:
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# From the Docker host invoke a PowerShell session within the Agent container
docker exec -ti js7-agent-primary pwsh
# Receive a PowerShell prompt like this
# PowerShell 7.1.3
# Copyright (c) Microsoft Corporation.
# https://aka.ms/powershell
# Type 'help' to get help.
# PS />
# Load the JS7 PowerShell module
PS />Import-Module JS7
# Connect to the JOC Cockpit container specifying account ("root") and password ("root") with the JOC Cockpit URL like this:
PS />Connect-JS7 -Url http://root:root@js7-joc-primary:4446 -Id jobscheduler
# An alternative way is to create a credential object like this
# PS />$credentials = ( New-Object -typename System.Management.Automation.PSCredential -ArgumentList "root", ( "root" | ConvertTo-SecureString -AsPlainText -Force) )
# PS />Connect-JS7 -Url http://js7-joc-primary:4446 -Id jobscheduler -Credentials $credentials
# The recommended way is to login to the JOC Cockpit REST API by use of a certificate should JOC Cockpit be configured for HTTPS and certificate based authentication
# PS />$credentials = ( New-Object -typename System.Management.Automation.PSCredential -ArgumentList "certs", ( "jobscheduler" | ConvertTo-SecureString -AsPlainText -Force) )
# PS />Connect-JS7 -Url https://js7-joc-primary:4443 -id jobscheduler -KeyStorePath /var/sos-berlin.com/js7/agent/var_4445/config/private/https-keystore.p12 -KeyStoreCredentials $credentials -RootCertificatePath /var/sos-berlin.com/js7/agent/var_4445/config/private/https-truststore.p12 -RootCertificateCredentials $credentials
# Display Controller status
PS />Get-JS7ControllerStatus -display
# The command should return the following output:
# ________________________________________________________________________
# ....... Controller ID: jobscheduler
# ............. version: 2.0.0-alpha.20210511
# ................. URL: http://controller-2-0-primary:4446
# ................ role: PRIMARY
# ............... title: PRIMARY CONTROLLER
# ....... running since: 04/30/2021 15:00:34
# ...... security level: MEDIUM
# ..... cluster coupled: True
# .. cluster node state: active
# .... component status: operational
# ... connection status: established
# ________________________________________________________________________
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Running PowerShell Jobs
To execute PowerShell code from a job running inside a "plus" Agent container you can use the following sequence of commands:
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pwsh -NoLogo -NonInteractive -Command '& {
Import-Module JS7
Connect-JS7 -Url http://root:root@js7-joc-primary:4446 -Id jobscheduler
Get-JS7ControllerStatus -display
}'
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Further Resources
Configure the Agent
Note that it is not necessary to configure the Agent - it runs out-of-the-box. The default configuration specifies that
- deployment of objects, e.g. workflows and jobs, is not subject to compliance requirements such as non-repudiation.
- HTTP connections are used that expose unencrypted communication between Controller instances and Agent. Authentication is performed by hashed passwords.
Users who intend to operate a compliant and secure job scheduling environment are suggested the JS7 - Agent Configuration for Docker Containers article series.
Build the Agent Image
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