Viewing logs for a cluster of instances on Google Stackdriver Logging

StackDriver Logging is a great feature of Google Compute Engine (GCE). You pretty much need a centralized logging solution if you are taking maximum advantage of the features offered by GCE. For example, most production applications will run on a cluster of web servers. If you set up the cluster as a managed instance group …

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Upgrade Ubiquiti UniFi Access Points (WAP) now to avoid KrackAttack

On October 15, 2017, security researcher Mathy Vanhoef announced the discovery of KrackAttacks, a serious flaw in the WPA2 encryption protocol that encrypts most WiFi connections. Using this method, an attacker can decrypt traffic from almost any wireless access point (WAP) and clients. Every WiFi access point will need to be upgraded with patch that prevents …

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Warning: CentOS/RedHat 7.4 installs FreeRADIUS 3 with breaking changes

When you run yum upgrade on a CentOS/RedHat 7 instance, you will be upgraded to 7.4. If you have a FreeRADIUS server, you will be upgraded from version 2 to 3, and your server will likely stop authenticating! Good times! Fortunately, the solution was not complicated for us, because we had good documentation. Symptoms Your …

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Managing persistent disks on Google Compute Engine

It can confusing when you have multiple persistent disks on an instance running on Google Compute Engine. For example, a server may have separate disks for the filesystem root, MySQL data, logs, and /tmp. Once you’ve created the Compute Engine disks and attached each one to the instance, how do you know which Compute Engine …

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Is there a “Primary Domain Controller” in Active Directory?

The Historical Answer With Windows NT, prior to the advent of Active Directory, there was one Primary Domain Controller (DC) per domain, and every other DC was a Backup. The Modern Answer When Active Directory was introduced with Windows 2000, domain controllers became fully multi-master. There is no primary domain controller. However, there are two …

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Failed to schedule Software Protection service for re-start: Error Code: 0x80041316

This post documents how to resolve the following error message, which may appear for no particular reason, and flood the Windows event log: Failed to schedule Software Protection service for re-start at 2116-09-14T16:54:27Z. Error Code: 0x80041316. The following steps will resolve the error on Windows Server 2012r2, but based on other links, similar steps should …

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