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JSON Schema is a vocabulary that allows you to annotate and validate JSON documents.Benefits
On top of it you can run JSON Forms, a data driven forms library:- Describes your existing data format(s).
- Provides clear human- and machine- readable documentation.
- Validates data which is useful for:
- Automated testing.
- Ensuring quality of client submitted data.
- Declare your forms as JSON based on a JSON Schema
- Fully-featured forms including data-binding, input validation, and rule-based visibility out-of-the-box
- Designed for customizability - from custom styling to custom widgets
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On Oracle Autonomous Database (Oracle Cloud DB service), the consumer groups of the predefined service names provide different levels of performance and concurrency.
How do you tune this limits?
- From the Autonomous Database details page, click Service Console.
For more information see the Oracle Manual
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In this second article, I suggest to explore further two simple helm chart for getting a bit more inside K8s.
Grafana
Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.
To install Grafana+Loki follow the instruction depicted here: the install will teach you how to use helm charts dependency too, so please take time to download the loki chart and study itThe Loki project was started at Grafana Labs in 2018, and announced at KubeCon Seattle. Loki is released under the AGPLv3 license
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Slackware was my first real distro in 1995 and I am happy it is still alive and kicking. It was a floppy disk based distribution. So you end up filling about 20 disks (!) of 1.44MB to install and boot Linux on your old i386 with 1MB of RAM and 40MB of HardDisk. After
some upgrade I finally got a PC with 8MB RAM and 500MB hard disk (and yes, it was a lot of space for that times!).
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Due to COVID19 pandemic, I and my family was forced in our home. So I revamped my 8bit computer book, with a new look and a nice search engine.
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Log4jShell vulnerability
- Kasperky article
- https://www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/ with the following "news":If you have previously used LOG4J_FORMAT_MSG_NO_LOOKUPS to mitigate the log4shell vulnerability, in certain conditions this will not be sufficient to protect your code from RCE. Refer to our mitigation guide for additional steps you can take to remediate the impact of Log4Shell
- Apache group released two fix in short delay, after the second fix was found vulnerable to other attacks, a third fix (2.17.0) was released.
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- Shutdown VM and compress the compact the disks
- Check if you have enough space: you need more or less the space of the VM disks+ minimal RAM configured
- From your Hyper-V host, run PowerShell as an administrator and then run something like: GET-VM This will display all the VMs running on the current host.
- Then run:
$ExportPath = “C:\\Exports” Export-VM -Name “BoxNameFromGetVM Step3” -Path $ExportPath
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On 2023 Ubuntu 18 LTS support will end, so I started to evaluate the next LTS release, Ubuntu 20.
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Apache Cassandra Compendium, pasting together documentation from https://cassandra.apache.org/doc/latest/cassandra/data_modeling/index.html
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