#FrageFürEinenFreund gibt es einen modernen Rewrite von #LOIC für Lasttests von Internetseiten? Wäre cool wenn man einfach ein paar Leuten eine Liste von URLs geben könnte die sich dann beteiligen um eine gewisse Uhrzeit, damit die Seiten getestet werden können. #highAvailability #distributedTesting #HTTP #Verfügbarkeit #followerpower

https://de.m.wikipedia.org/wiki/Low_Orbit_Ion_Cannon

Whilst migrating from my very manual email setup to something orchestrated by ansible and highly-available, I have come upon all sorts if jankiness I don't remember configuring.

Currently, I have multiple working MX servers, but only one postfix submission server. The MX's currently all point to a single dovecot server for LMTP, and it also pulls double-duty as my IMAP server.

Next on my list for ansible configuration:

• Set up acme.sh so that each MX can handle its own certificates for postfix and dovecot
• Configure Submission, LMTP and IMAP
• Configure extra mail services, such as opendkim, opendmarc, spf checking, dovecot indexing

This has been a real learning experience, and with any luck will get me to the point where I'm able to spin up/down new mail handlers just by adding hostnames to an ansible inventory list.

#sysadmin #homelab #ansible #dovecot #postfix #highavailability

For this week's #hamchallenge : My primary logging software is #Wavelog. The webserver and backend database both run on virtualized machines in a #HighAvailability #Proxmox #cluster (same one that hosts this instance!). Those are backed up daily to another machine on site via PBS, then those backups are synced to a remote server running in a house in another city.

In addition, my log is also synced to both #QRZ and #LOTW every 6 hours or so, but I didn't think it qualifies as a true backup, since there is some data which those logs don't record.

#HC14S @hamchallenge #hamradio #amatuerradio

Hey you! Wanna know a secret? We're upgrading to Patroni 3.x in the next release of Crunchy Postgres via Automation. I know right?! Get the skinny on our plans in my latest blog post: https://hunleyd.github.io/posts/coming-soon-to-cpa---patroni-3.x/ #ansible #postgres #highavailability #ha #failover #developer #devinsights #devrel #spillingthetea

Ensuring high availability in cloud-based in-memory data stores is essential. But what does it truly involve? Discover the main challenges, strategies, and trade-offs in building resilient systems. https://www.dragonflydb.io/blog/high-availability-in-cloud-based-in-memory-data-stores

#HighAvailability #Cloud #Databases #InMemoryStorage #DragonflyDB #Scalability
https://www.dragonflydb.io/blog/high-availability-in-cloud-based-in-memory-data-stores

Build Software Like It’s Keeping You Alive at 30,000 Feet ✈️

Imagine your product / code - yes, your precious, hastily-assembled Frankenstein of logic and comments that lie, is now running inside an airplane. Would you board that flight? Would you trust your own exception handling at cruising altitude? 🤔 If the answer isn’t an immediate YES, congratulations! 🎉 You’ve just admitted your software is a ticking time bomb💣. So, how can you sell untrusted software to your partners?

#SoftwareEngineering #AviationSafety #CodeQuality #ReliabilityMatters #MissionCritical #SecureCoding #FailSafe #SoftwareTesting #NoUnhandledExceptions #BuiltForSurvival #HighAvailability #TrustYourCode #ZeroBugs #FlawlessExecution #SoftwareReliability

So, the scare stories about the World's end, if you build a two-node #Proxmox cluster, are a bit exaggerated. After reading the documentation here https://pve.proxmox.com/wiki/Two-Node_High_Availability_Cluster and here https://pve.proxmox.com/wiki/Cluster_Manager I finally get the point. It is highly recommended to have at least three nodes when you build a high-availability cluster. It is totally fine to have two nodes when you don't need high availability.

#homelab #selfhosted #selfhosting #highavailability #cluster #ProxmoxVE #documentation #rtfm

Hey look, it's another post in my 'Coming Soon to CPA' blog entries. This time? Updated OSes and Ansible version. Will your OS make the cut, or did it get dropped from the platform?
https://hunleyd.github.io/posts/coming-soon-to-cpa---updated-oses-and-ansible/
#ansible #comingsoon #automation #highavailability #postgresql #developers

Join me in the first of our 'Coming Soon to CPA' blog entries where we discuss features and changes that have been merged into development but not yet released. First up: Package Pinning #ansible #comingsoon #automation #highavailability #postgresql #devops https://hunleyd.github.io/posts/coming-soon-to-cpa---package-pinning/

With support for #postgresql 17, #ansible 2.17, an upgraded #monitoring stack, and even support for a whole new #linux #distribution, you really should check out my write-up on what's new in Crunchy #Postgres via Automation V2.2 https://hunleyd.github.io/posts/crunchy-postgres-via-automation-v2.2/

#automation #highavailability #grafana #prometheus #sql #devops #newrelease

The longer I work in IT the more I'm convinced that high available systems cause more outages than they prevent. #highavailability #complexity

Mal eine #Frage zum Thema #Ausfallsicherheit bzw. #HighAvailability – wenn ich einen #Linux Server spiegeln möchte, also dass der eine einspringen kann, falls der andere ausfällt, welche Open Source-Lösung sollte ich mir dafür ansehen?

🔀 Categorizing How Distributed Databases Utilize Consensus Algorithms
— Adam Prout

https://medium.com/@adamprout/categorizing-how-distributed-databases-utilize-consensus-algorithms-492c8ff9e916

#databases #distsys #highavailability

There's a lot of improvements coming out in #PostgreSQL 17, but one we're most looking forward to are the failover slot synchronization improvements directly benefiting native high availability. This will allow logical replication to continue working in the event of a primary failover.

Take a closer look: https://www.postgresql.org/docs/17/logical-replication-failover.html

What new feature are you most excited for?

#postgres #dba #database #opensource #foss #newrelease #technews #itnews #dbms #data #logicalreplication #highavailability

Have you ever given any thought to using #CitusData to upgrade your #PostgreSQL experience? It’s a 100% open source extension that allows you to transform #Postgres into a distributed database, allowing you to quickly achieve #HighAvailability and #Performance at any scale.

At Data Bene, we provide in-depth consulting services, managed Citus Data deployments for a database-as-a-service offering, and/or training packages on any related topic.

Interested? Contact anytime. https://data-bene.io/en#contact

I recently updated my apcupsd scripts for my #homelab #proxmox #cluster. I switched from email notifications to #Pushover and tried to prevent the "HA-shuffle" on shutdown.

Feedback is welcome!

https://github.com/k3can/apcupsd

#selfhosted #highavailability #sysadmin

At HEX64, we tackle NOC scalability challenges like data growth, high availability, and system integration. Our solutions ensure seamless network performance by implementing robust data storage, redundancy strategies, and advanced security measures. Partner with us to manage complex networks and ensure optimal, scalable operations.

https://www.hex64.net/noc-services/

#NOC #ScalabilityChallenges #HEX64 #NetworkOperationsCenter #DataGrowth #HighAvailability #SystemIntegration #NetworkPerformance

Learn how to deploy a highly available and scalable PostgreSQL multi-master, multi-zone architecture on AWS, ensuring fault tolerance and geographically distributed write capabilities for your databases.

Read the blog: https://stormatics.tech/blogs/deploying-postgresql-multi-master-multi-zone-architecture-on-aws

...
#PostgreSQL #OpenSource #Database #HighAvailability

Boost your database performance with multi-master architecture in PostgreSQL. Learn about the benefits (scalability, fault tolerance, high availability) and trade-offs (data consistency, resource demands, conflict resolution) in this blog post by @StormaticsTech Consultant, Semab Tariq.

➡️ Read the blog: https://stormatics.tech/blogs/understanding-multi-master-architecture-in-postgresql-benefits-and-trade-offs

...
#PostgreSQL #HighAvailability #OpenSource #Database #DBA