Article
· Mar 25 7m read
Introduction to Kubernetes

In this article, we will cover below topics:

  • What is Kubernetes?
  • Main Kubernetes (K8s) Components


What is Kubernetes?

Kubernetes is an open-source container orchestration framework developed by Google. In essence, it controls container speed and helps you manage applications consisting of multiple containers. Additionally, it allows you to operate them in different environments, e.g., physical machines, virtual machines, Cloud environments, or even hybrid deployment environments.

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In case you're planning on deploying IRIS For Health, or any of our containerized products, via the IKO on OpenShift, I wanted to share some of the hurdles we had to overcome.

As with any IKO based installation, we first need to deploy the IKO itself. However we were getting this error:

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The IKO will dynamically provision storage in the form of persistent volumes and pods will claim them via persistent volume claims.

But storage can come in different shapes and sizes. The blueprint to the details about the persistent volumes comes in the form of the storage class.

This raises the question: we've deployed the IrisCluster, and haven't specified a storage class yet. So what's going on?

You'll notice that with a simple

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The IKO allows for sidecars. The idea behind them is to have direct access to a specific instance of IRIS. If we have mirrored data nodes, the web gateway will (correctly) only give us access to the primary node. But perhaps we need access to a specific instance. The sidecar is the solution.

Building on the example from the previous article, we introduce the sidecar by using a mirrored data node and of course arbiter.

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We now get to make use of the IKO.

Below we define the environment we will be creating via a Custom Resource Definition (CRD). It lets us define something outside the realm of what the Kubernetes standard knows (this is objects such as your pods, services, persistent volumes (and claims), configmaps, secrets, and lots more). We are building a new kind of object, an IrisCluster object.

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The IKO documentation is robust. A single web page, that consists of about 50 actual pages of documentation. For beginners that can be a bit overwhelming. As the saying goes: how do you eat an elephant? One bite at a time. Let's start with the first bite: helm.

What is Helm?

Helm is to Kubernetes what the InterSystems Package Manager (IPM, formerly ObjectScript Package Manager - ZPM) is to IRIS.

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Your may not realize it, but your InterSystems Login Account can be used to access a very wide array of InterSystems services to help you learn and use InterSystems IRIS and other InterSystems technologies more effectively. Continue reading to learn more about how to unlock new technical knowledge and tools using your InterSystems Login account. Also - after reading, please participate in the Poll at the bottom, so we can see how this article was useful to you!

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I am trying to execute a program from within cache using a $zf call

S X=$ZF(-1,"C:\""Program Files (x86)""\Car-Part\Messaging\iCPM.exe")

For the sake of this post I changed it to open notepad

S X=$ZF(-1,"C:\Windows\notepad.exe")

If I call it directly from terminal notepad opens and all is happy.

If I add it to a program we use to run certain tasks once an hour or even every 10 minutes it will fire off notepad but it will be in the background.

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Article
· Nov 2, 2023 3m read
How to hide the source program

InterSystems FAQ rubric

For routines (*.mac)

You can hide the source by exporting/importing only the *.obj that is generated after compiling the source program.

The command execution example specifies EX1Sample.obj and EX2Sample.obj, which are generated by compiling EX1Sample.mac and EX2Sample.mac, as export targets and exports them to the second argument file.

After moving to another namespace, I am using the exported XML file to perform the import.

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Hello! I just had a quick question for anyone out there with more experience on deploying Ensemble productions.

I'm currently trying to export my Ensemble production WITH the Business Partners so I don't have to rebuild or add to that table after I import my Ensemble Production. I know that this is a small thing and doesn't actually affect anything in the production in terms of performance, but I like to have it for better documentation.

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We have some custom tools that do project based deployment from environment to environment. In VS Code, we're struggling to find the best way to export PRJ files that contain the contents of a project the way we were able to in Studio. We can edit existing projects, and in server side editing we can create projects, but we can't seem to extract the project files (Not the classes, the wrapper) to store in our source control solution for deployment purposes.

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Announcement
· Sep 11, 2023
New Video: Migrating to NoPWS

Hi all! I just wanted to share a new video – the first in a series of three – addressing the migration from the InterSystems Private Web Server to an external web server. This video covers the process of installing a web server and upgrading your IRIS instance in a Linux/Unix environment. Two more videos on the way will show the process for a mirrored setup in Linux/Unix, and for a single instance in Windows.

Migrating a Single Instance to an External Web Server in Linux or Unix

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Article
· Jul 4, 2023 2m read
Build iris image with cpf merge

When it comes to build an iris image, we can use the cpf merge files.

Here is an cpf merge example:

[Actions]
CreateDatabase:Name=IRISAPP_DATA,Directory=/usr/irissys/mgr/IRISAPP_DATA

CreateDatabase:Name=IRISAPP_CODE,Directory=/usr/irissys/mgr/IRISAPP_CODE

CreateNamespace:Name=IRISAPP,Globals=IRISAPP_DATA,Routines=IRISAPP_CODE,Interop=1

ModifyService:Name=%Service_CallIn,Enabled=1,AutheEnabled=48

CreateApplication:Name=/frn,NameSpace=IRISAPP,DispatchClass=Formation.REST.Dispatch,AutheEnabled=48

ModifyUser:Name=SuperUser,PasswordHash=a31d24aecc0bfe560a7e45bd913ad27c667dc25a75cbfd358c451bb595b6bd52bd25c82cafaa23ca1dd30b3b4947d12d3bb0ffb2a717df29912b743a281f97c1,0a4c463a2fa1e7542b61aa48800091ab688eb0a14bebf536638f411f5454c9343b9aa6402b4694f0a89b624407a5f43f0a38fc35216bb18aab7dc41ef9f056b1,10000,SHA512
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I am running into an error trying to send an Alert Email to test the functionality of IRIS HealthShare Health Connect 2022.1 compared to Cache HealthShare Health Connect 2018.1.3. I was trying to send an Alert email, when I am getting the following error on my EMailAlert operation which is using EnsLib.EMail.OutboundAdpater.

ERROR <Ens>ErrException: <UNDEFINED>FText+4 ^%occMessages *msg -- logged as '-'
number - @''

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When you install an IRIS or Caché instance on Windows Server, you'll usually need to install it under a specific user account that has network access permissions. This is very handy when you needs to access network resources for creating files or directly accessing printers.

TL;DR: see key takeaways at the bottom!

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Usualy, if you want to deploy a solution, you need to add the items, configure your lookup tables and default configuration manually.
It's okay if you have all the permissions and privileges to perform these actions. If you want to deploy to a client's production server, and you don't have the permissions, you need to indicate in a document ALL the steps that the deployment manager has to perform.

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Some Usage cases

1. A deployment may consist of two high availability instances and two disaster recovery instances in a different data center.

The corresponding UAT environment could replicate this giving a total of 8 instances. How do you confirm CPF and Scheduled task alignment across ALL instances.

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Question
· Dec 15, 2022
Installation Manifest

I am trying to make application deployable using Installation Manifest.

I use IRISHealth_Community-2022.2.0.368.0-win_x64.exe to run manifest during installation

I run it from windows command line using the following command:

IRISHealth_Community-2022.2.0.368.0-win_x64.exe INSTALLERMANIFEST="C:\FixxerInstall\src\Installer.xml" INSTALLERMANIFESTLOGFILE="Log.txt" INSTALLERMANIFESTLOGLEVEL=3 INSTALLERMANIFESTPARAMS="FlaggerCSPDir=C:\FixxerInstall\src\csp\flagger,ClassImportDir=C:\FixxerInstall\src\import\"

It works but a little bit strange.

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Question
· Dec 12, 2022
IRIS Runtime Environment

Hello community.

I have project on IRIS.

I am trying to make application deployable.

The Idea is to have 1 file that customer can download and run. For now I realize that whole intersysytems developer kit that includes Studio, terminal acts as runtime environment (Like Java has JDK).

Is it possible to wrap my project to 1 archive (Back to Java example .war or .jar) and run it on some application server (like Tomcat) without Studio etc..?

Thank you!

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Overview

Predictable storage IO performance with low latency is vital to provide scalability and reliability for your applications. This set of benchmarks is to inform users of IRIS considering deploying applications in AWS about EBS gp3 volume performance.

Summary

  • An LVM stripe can increase IOPS and throughput beyond single EBS volume performance limits.
  • An LVM stripe lowers read latency.
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Being interoperable is more and more important nowadays. InterSystems IRIS 2022.1 comes with a new messaging API to communicate with event streaming platforms like Kafka, AWS SQS/SNS, JMS and RabbitMQ.

This article shows how you can connect to Kafka and AWS SQS easily.
We start with a brief discussion of the basic concepts and terms of event streaming platforms.

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Good morning. Perhaps someone can tell me if this IRIS health communit version (IRISHealth_Community-2022.1.0.209.0-lnxubuntu2004x64) is supposed

to work in an Ubuntu 20.04 LTS installation in an Oracle Virtual Box .

I am trying to install different versions on Ubuntu . I tried with the 18 version. No luck. Than I've tried with the 20.04 version. No luck either.

The error I am having now is below

///////////////////////// error message from the install ////////////////////////////////

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Article
· Jul 21, 2022 11m read
ECP With Docker

Hi community,

This is the third article in the series about initializing IRIS instances with Docker. This time, we will focus on Enterprise Cache Protocol (ECP).

In a very simplified way, ECP allows configuring some IRIS instances as application servers and others as data servers. Detailed technical information can be found in the official documentation.

This article aims to describe:

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Announcement
· Jun 18, 2022
[Video] Saving on Storage

Hey Community,

Check out the latest video on InterSystems Developers YouTube channel:

Saving on Storage

https://www.youtube.com/embed/EOqohVVW8rs
[This is an embedded link, but you cannot view embedded content directly on the site because you have declined the cookies necessary to access it. To view embedded content, you would need to accept all cookies in your Cookies Settings]

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