Category:Spectranet - Revision history

Admin: Add YouTube video summaries and fix broken video embeds (HTML5video -> EmbedVideo)

2026-07-25T02:52:50Z

Add YouTube video summaries and fix broken video embeds (HTML5video -> EmbedVideo)

← Older revision		Revision as of 02:52, 25 July 2026
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	==Spectra PCS cluster failover process. - Tetra Support Staff - Manish Singh==		==Spectra PCS cluster failover process. - Tetra Support Staff - Manish Singh==

	~~<HTML5video type="~~youtube~~" width="~~640~~" height="480" autoplay="false">aUwHgxTPlL8<~~/~~HTML5video>~~		{{#ev:youtube\|aUwHgxTPlL8\|640}}

			'''Video summary:''' Live demo of the PCS cluster failover process for Spectranet's Nagios monitoring server. Before failing over, checks that DRBD (application data) and MySQL master-slave replication are fully synced between the two nodes. Failover itself is done by putting the currently-active node into standby (`pcs node standby`), which cleanly stops its services in order (Apache, cron, NPCD, Nagios) while the other node starts the same services and takes over the virtual IP -- verified both from the Nagios admin panel and from the backend PCS/fencing status. Demonstrates the failover in both directions (node 2 to node 1, then back), including running a manual `resource cleanup` when one stop step reported a failure. Confirms the web interface stays reachable throughout via the shared virtual IP.


	==Spectranet Training. Date:- 31- January- 2026 - Tetra Support Staff - Manish Singh==		==Spectranet Training. Date:- 31- January- 2026 - Tetra Support Staff - Manish Singh==

	~~<HTML5video type="~~youtube~~" width="~~640" ~~height=~~"~~480" autoplay="false">ntQ4_xZ1gNg<~~/~~HTML5video>~~		{{#ev:youtube\|ntQ4_xZ1gNg\|640}}

			'''Video summary:''' KT session on Spectranet's SOC (Security Operations Center) Nagios XI environment, recently upgraded (OS and Nagios version both bumped). Architecture: a primary Nagios XI node in an HA pair (MySQL master-master replication + DRBD disk sync between the two nodes, PCS/fencing managing which node is live). Covers a recent architecture change: the old "Probe" satellite-server setup (used to offload monitoring load for remote/high-volume devices, feeding passive checks back to the main server) was replaced with Nagios XI's newer built-in Mod Gearman distributed-worker feature, which fixed a recurring problem where passive checks weren't triggering alerts in a timely way -- the probe machine is now just a Gearman worker, not a separate monitoring instance. Flags an important operational caution: at the time of recording, MySQL replication to the secondary HA node is broken/paused (not yet fixed), so the team must not attempt to shift the cluster over to that node. Also walks through the credentials sheet for VPN/server/web-console access, and references separate documentation already uploaded to the wiki covering the DRBD/Pacemaker cluster setup and the OS/version upgrade process used (built a fresh VM on the new OS, migrated the existing app version across, then upgraded in place).

Pradeep at 06:19, 11 February 2026

2026-02-11T06:19:30Z

← Older revision		Revision as of 06:19, 11 February 2026
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	<HTML5video type="youtube" width="640" height="480" autoplay="false">aUwHgxTPlL8</HTML5video>		<HTML5video type="youtube" width="640" height="480" autoplay="false">aUwHgxTPlL8</HTML5video>

	==Spectranet Training. - Tetra Support Staff - Manish Singh==		==Spectranet Training. Date:- 31- January- 2026 - Tetra Support Staff - Manish Singh==

	<HTML5video type="youtube" width="640" height="480" autoplay="false">ntQ4_xZ1gNg</HTML5video>		<HTML5video type="youtube" width="640" height="480" autoplay="false">ntQ4_xZ1gNg</HTML5video>

Pradeep: /* Spectra PCS cluster failover process. - Tetra Support Staff - Manish Singh */

2026-02-10T10:52:19Z

Spectra PCS cluster failover process. - Tetra Support Staff - Manish Singh

← Older revision		Revision as of 10:52, 10 February 2026
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	<HTML5video type="youtube" width="640" height="480" autoplay="false">aUwHgxTPlL8</HTML5video>		<HTML5video type="youtube" width="640" height="480" autoplay="false">aUwHgxTPlL8</HTML5video>

			==Spectranet Training. - Tetra Support Staff - Manish Singh==

			<HTML5video type="youtube" width="640" height="480" autoplay="false">ntQ4_xZ1gNg</HTML5video>

Pradeep at 12:19, 8 August 2025

2025-08-08T12:19:17Z

← Older revision		Revision as of 12:19, 8 August 2025
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	[[category:Tetra Clients]]		[[category:Tetra Clients]]
			==Spectra PCS cluster failover process. - Tetra Support Staff - Manish Singh==

			<HTML5video type="youtube" width="640" height="480" autoplay="false">aUwHgxTPlL8</HTML5video>

Biswajit: Created page with "category:Tetra Clients"

2019-11-26T14:03:46Z

Created page with "category:Tetra Clients"

New page

[[category:Tetra Clients]]