Archive for the ‘*nix’ Category
Posted by jpluimers on 2022/01/19
Since uptimerobot has slowly moving free features, part of my family uses it to monitor uptime of their personal stuff, and I don’t want to pay for the free monitoring I do on Embarcadero infrastructure (I know that they have been phasing out older useful sites for ages, but even their main sites were down for 2 days about a year ago).
Yes, I know the competitiveness of [Wayback] Website monitoring – Wikipedia, and I’m glad Uptimerobot has been there for a relatively long time, but alas: for personal use…
The list of of the pricing pages of each site, containing a one line summary blurb if it was available:
- [Wayback] Freshping – Pricing
Freshping FREE plan ✓ 50 URL checks ✓ 1-minute interval ✓ FREE Public status pages. Need more? Check out the enterprise plan.
- [Wayback] Pricing | Checkly
50k API check runs / mo, 5k browser check runs / mo, 5 users, basic features
- [Wayback] StatusCake – Try it Today!
Basic, FREE, 10 Uptime Monitors, 5 Minute Tests
- [Wayback] pricing | Happy Apps
Free: 3 Checks, 5 minute min. monitoring interval, All check types, 3 days history max, 0 sms alerts, ∞ email alerts, SSH Only
Via [Wayback] 16 Best Online Services to Monitor Sites Uptime
Related: [Wayback] EmbarcaderoMonitoring: www http
–jeroen
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Posted in *nix, Delphi, Development, Monitoring, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2022/01/19
A few links and notes:
- [Wayback] Changing the hostname of an ESX or ESXi host (1010821)
Run these commands to change the hostname in ESXi 5.x, ESXi 6.x,ESXi 7.x, using the command line:
- esxcli system hostname set –host=hostname
- esxcli system hostname set –fqdn=fqdn
- [Wayback] ESX Host appears as localhost.localdomain in VMware Infrastructure/vSphere client (2009720)
The name resolution parameters were not properly configured during the installation of the ESX host.
- [Wayback] Domain repoint for embedded vCenter Server fails with error: “domain_consolidator Failed to set machine id” (71020)
This issue is caused by a mismatch between the FQDN that was configured as the PNID during the vCenter Server deployment and the hostname that is currently configured.
I had a mismatch happen because of the second entry: a host configured in a different domain than it was deployed to.
Here are the commands to list and change the hosts name, domain and fqdn:
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Posted in *nix, *nix-tools, ash/dash, ash/dash development, Development, ESXi6, ESXi6.5, ESXi6.7, ESXi7, Power User, Scripting, Software Development, Virtualization, VMware, VMware ESXi | Leave a Comment »
Posted by jpluimers on 2022/01/18
Almost two years ago, GitHub – facebook/osquery: SQL powered operating system instrumentation, monitoring, and analytics published from the automatic blog queue.
It was in the midst of my rectum cancer treatment, so I was glad the blog queue back then was still about 18 months deep.
This meant I looked into osquery in 2018, which I remember because I needed it on MacOS as I did not want to remember the syntax for MacOS specific commands on getting system information. It also coincides with how much my repository fork was behind: [Wayback: jpluimers/osquery commits/Archive: jpluimers/osquery commits].
Fast forward to now, the breath of systems I’m involved with has widened, so I was glad to see that Kristian Köhntopp mentioned it:
So time to try it again (:
The links he mentioned:
- [Wayback/Archive] Welcome to osquery – osquery
osquery is an operating system instrumentation framework for Windows, OS X (macOS), Linux, and FreeBSD. The tools make low-level operating system analytics and monitoring both performant and intuitive.
- [Wayback/Archive] Welcome to osquery – osquery: High Level Features
The high-performance and low-footprint distributed host monitoring daemon, osqueryd, allows you to schedule queries to be executed across your entire infrastructure. The daemon takes care of aggregating the query results over time and generates logs which indicate state changes in your infrastructure. You can use this to maintain insight into the security, performance, configuration, and state of your entire infrastructure. osqueryd‘s logging can integrate into your internal log aggregation pipeline, regardless of your technology stack, via a robust plugin architecture.
The interactive query console, osqueryi, gives you a SQL interface to try out new queries and explore your operating system. With the power of a complete SQL language and dozens of useful tables built-in, osqueryi is an invaluable tool when performing incident response, diagnosing a systems operations problem, troubleshooting a performance issue, etc.
- [Wayback/Archive] osqueryd (daemon) – osquery
- [Wayback/Archive] osqueryi (shell) – osquery
- [Wayback/Archive] Aggregating Logs – osquery
- [Wayback/Archive] AWS Logging – osquery
Main site: [Wayback/Archive] osquery | Easily ask questions about your Linux, Windows, and macOS infrastructure
Repository: [Wayback/Archive] osquery/osquery: SQL powered operating system instrumentation, monitoring, and analytics.
–jeroen
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Posted in Software Development, Development, Power User, *nix, Infrastructure, SocialMedia, Apple, Windows, Mac OS X / OS X / MacOS, Mac, Facebook, *nix-tools, DevOps | Leave a Comment »
Posted by jpluimers on 2022/01/18
Since ESXi boots from RAM, most files in /etc are not persisted after modification.
The files that are persisted, are only persisted once every hour by auto-backup.sh, so better run auto-backup.sh by hand if you want to reboot after changing them.
The auto-backup.sh script is ran every hour at 1 minute past the hour as per below crontab.
Default ESXi crontab in /var/spool/cron/crontabs/root:
#min hour day mon dow command
1 1 * * * /sbin/tmpwatch.py
1 * * * * /sbin/auto-backup.sh
0 * * * * /usr/lib/vmware/vmksummary/log-heartbeat.py
*/5 * * * * /bin/hostd-probe.sh ++group=host/vim/vmvisor/hostd-probe/stats/sh
00 1 * * * localcli storage core device purge
Schedules deciphered via [Wayback] Crontab.guru – The cron schedule expression editor:
- [Wayback] Every day at
01:01: “This module removes stale temporary files”
1 1 * * * /sbin/tmpwatch.py
- [Wayback] Every hour at
*:01: saves backup to /bootbank/state.tgz.
1 * * * * /sbin/auto-backup.sh
- [Wayback] Every hour at
*:00 logs heartbeat messages to /var/log/vmksummary.log like 2021-02-23T19:00:02Z heartbeat: up 577d2h37m16s, 9 VMs; [[2802426 vmx 4194304kB] [6176344 vmx 4194304kB] [68997 vmx 8388608kB]] [[2802426 vmx 0%max] [6176344 vmx 0%max] [68997 vmx 0%max]]
0 * * * * /usr/lib/vmware/vmksummary/log-heartbeat.py
- [Wayback] Every
5th minute logs to /var/log/hostd-probe.log.
*/5 * * * * /bin/hostd-probe.sh ++group=host/vim/vmvisor/hostd-probe/stats/sh
- [Wayback] Every day at
01:00: Removes storage devices which have not been seen in some time interval.
00 1 * * * localcli storage core device purge
Note that localcli commands are the same as esxcli; for esxcli, a running hostd is required; localcli can run without hostd. See:
–jeroen
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Posted in Software Development, Development, Power User, *nix, VMware, Scripting, *nix-tools, Virtualization, ESXi6, ESXi6.5, ESXi6.7, ESXi7, ash/dash development, ash/dash | Leave a Comment »
Posted by jpluimers on 2022/01/17
On VMware ESXi, with the Busybox ash/dash shell, I wanted to get the current UTC timestamp in ISO 8601 format without dashes (-) or especially colons (:) and plus-signs (+) you have to back-slash escape colons or double quote parameters, which is often can be a pain).
- [Wayback] How to Manipulate Filenames Having Spaces and Special Characters in Linux describes the pain handling special characters:
In this article, we will see how to create, copy, move and delete filenames that starts with spaces and special characters (say #, *, &, =, etc.) in Linux.
- [Wayback] filenames – What characters are safe in cross-platform file names for Linux, Windows and OS-X – Super User
…
[]()^ #%&!@:+={}'~ and [`] all have special meanings in many shells, and are annoying to work around, and so should be avoided. They also tend to look horrible in URLs.
…
This is why we can’t have good things: Getting the UTC 8610 timestamp was far less easy than I hoped for.
First of all, Busybox only allows for a precision of seconds, not milliseconds, and the specification format needs better documentation as per [Wayback] embedded linux – How to get ISO8601 seconds format from “date” in busybox? – Stack Overflow:
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Posted in *nix, *nix-tools, ash/dash, ash/dash development, Development, ESXi6, ESXi6.5, ESXi6.7, ESXi7, Power User, Scripting, sed, sed script, Software Development, Virtualization, VMware, VMware ESXi | Leave a Comment »
The Wiert Corner - irregular stream of stuff 