After thinking about the concept for a few years and actively working on it for six months, it’s time for the first public release.Continue reading “Butler Auth 1.0 now available – strong authentication for Qlik Sense!”
Butler 4.2 brings alerting superpowers to Qlik Sense Enterprise on Windows.
This version of Butler might actually bring you the most flexible and powerful alert emails ever for Qlik Sense.
Layout and contents of the emails are configurable, script logs included in the email and more.
Find all details at butler.ptarmiganlabs.com.
Butler adds various features to Qlik Sense Enterprise (the Windows server version), making it easier to develop, maintain and operate Qlik Sense environments and apps.
Butler is open source software.
Full docs, getting started guide available at butler.ptarmiganlabs.com.
The Corona pandemic made lots of people start working from home and the importance of instant messaging apps has increased quite dramatically since.
As a result more people are logged into Slack, Microsoft Teams and similar tools. This is good as it opens up for using these tools as a communication channel also from Qlik Sense apps to end users.
In this post we’ll take a look at how messages can be sent from Sense load scripts to Microsoft Teams. The same concept can be applied also to Slack and other IM tools that support webhooks from external tools to the IM tool – usually called “incoming webhooks”.Continue reading “Post messages to Microsoft Teams from Qlik Sense”
Security is important – period.
Usability of web based systems is off course important, but so is security. In the previous (first) article in this series we looked at how the Traefik reverse proxy can be used set up end user friendly URLs for Qlik Sense Enterprise (QSE) environments, while at the same time adding a layer of security by hiding the internal structure of the QSE cluster.
Today we’ll look at how you can get free SSL/TLS certificates from Let’s Encrypt and how these are used to provide https for QSE.
All code, scripts etc used in this article is available in the Part 2 folder in this GitHub repository.
Let’s go!Continue reading “Superpowers to Qlik Sense Enterprise, part 2: Free https certificates from Let’s Encrypt”
Edit: A GitHub repository has been created with the files mentioned in this article:
What’s Traefik and how does it relate to Qlik Sense?
Traefik is one of today’s most hyped reverse proxies. It’s available in both a commercial and a (very capable!) open source version. According to the company behind Traefik it’s been downloaded more than 2 billion times – that’s a lot…
In this blog post we’ll take a look at how Traefik can run natively on Windows server, providing services to a Qlik Sense Enterprise on Windows cluster.
We will see how this can make Qlik Sense easier to use for end users as well as easier to run and operate for sysadmins.
Specifically, we’ll use Traefik to set up TLS secured access (a.k.a. https) to Qlik Sense, while at the same time establishing a solid platform to which we can add more features in coming blog posts.
Starting with the basics makes sense though – let’s get to it!Continue reading “Superpowers to Qlik Sense Enterprise: The Traefik reverse proxy, part 1”
This is part 3 in a series about how healthchecks.io can be used to solve various kinds of monitoring scenarios for Qlik Sense Enterprise on Windows (QSEoW) environments.
Continue reading “Black box monitoring of Butler tools – monitoring the monitor”
Most of the Butler family of DevOps tools for Qlik Sense can now be monitored using healthchecks.io or similar tool.
If one of the supported Butler tools go down, an alarm is raised and one or more alerts are sent via email, Slack, Teams, PagerDuty or other supported channels.
This means that both infrastructure (servers etc), applications/services and data sources can be monitored using the same tool and on the same dashboards.
In practice this means it is possible to run Butler SOS, Butler Cache Warming etc as Docker containers on for example a Raspberry Pi 4. If you are worried about that poor little Raspi failing you can add a bunch of them into a Kubernetes cluster, and then run the Butler tools there.
And here is the Raspi cluster itself, with 4 of the 7 nodes installed:
Ok, ok – I hear you – is it really a good idea to run close to mission critical software on Raspberry Pi’s?
No of course not, but the cloud providers are starting to offer Arm based virtual machines (Amazon does this already with their EC2 A1 instances), with roughly twice the performance per dollar compared to Intel based VMs.
So running Butler on Arm VMs might be a way to save some money, if the cloud provider you use happens to offer Arm VMs.
Or just surrender to your inner geek and build your own Raspi k8s cluster… Lots of fun and a great way to learn about k8s!
Docker images available on Docker Hub, as always.
Time for another update of Butler SOS, this time to version 5.4.
Github release : https://github.com/ptarmiganlabs/butler-sos/releases Docker image : https://hub.docker.com/r/ptarmiganlabs/butler-sos Documentation : butler-sos.ptarmiganlabs.com
This release both adds some nice new features as well as enhancing existing ones and fixing some bugs. Let’s take a look at the highlights.
- Track in detail what apps are loaded into each Sense server.
- Regular apps and session apps are handled separately, making app metrics easier to understand and more relevant
- Sample dashboards are now built using the brand new, shiny and all together awesome Grafana 7. Did I mention that Grafana 7 is awesome? Awesome.
- Ever wondered how long Butler SOS has been running or how much memory it uses? The new uptime messages have you covered.
- You are properly impressed with the uptime messages – good. Why not store them to Influxdb, so you can also visualize Butler SOS’ own memory use? It’s just a couple of changes in the config file away.
- Better control over what features are enabled. Don’t need Docker health checks? Now you can turn that (and other) feature off.
- Ah, you are a serious Sense user and have separate DEV and PROD environments? Good – now Butler SOS supports multiple instances running on a single server.
- Who will monitor the monitor? Butler SOS can now send heartbeats to customisable URLs at desired intervals. Perfect if you want to monitor Butler SOS using for example healthchecks.io. Very, very cool actually.
- Bugs, bugs and bugs. The known ones have been fixed. Keep reporting new ones!
- Update all dependencies to latest versions, to ensure security concerns are adressed.
Curious what it looks like in practice?
Seeing is believing:
This is part 2 in a series about how healthchecks.io can be used together with Qlik Sense Enterprise on Windows (QSEoW).
Oh data where art thou?
Windows Server just works… right?
Still, things do happen and it certainly would be nice to get an push alert when a server hasn’t checked in according to schedule.
The most common monitoring – for Windows/Linux/…. servers, databases, Qlik Sense etc is based on the tool keeping an eye on some measurement and then alert when the measurement goes beyond some threshold.
This is fine, and this is a very important monitoring use case. But in cases where a server just hangs the last measurement received might be fine, and no alerts are sent.
Black box monitoring kind of reverses the roles:
The monitored system has to prove that it’s doing fine. Failing to do so within some predefined schedule will trigger an alarm, with an optional alert being sent.
The previous article showed how this concept can be used to ensure that some Qlik Sense app has reloaded as intended, before a specific time each day. A concrete, common use case would be that yesterday’s data should be processed and loaded into Sense before 7 am next day. Alert if not)
Now, let’s use the same tool and concept to monitor also the Windows servers that Qlik Sense Enterprise on Windows (QSEoW) runs on.Continue reading “Black box monitoring of Windows servers”