bjornbouetsmith

// Based on https://gist.github.com/halmartin/28e013a9034be04777073bccc918cb95 (python)
// And uses Crc32 and Base32 from other github code
// Code should run on .NET Framework 4.7+
using System.Security.Cryptography;
// The 3 constants is byte definitions inside the library mentioned in the original code
// These should be HEX encoded to strings without leading 0x, i.e. "0d0a" etc.
const string AES_IV = "";// This is one of the values you need to dig out of the library;
const string HMAC_KEY =  "";// This is one of the values you need to dig out of the library
const string HMAC_MSG_RAW =  "";// This is one of the values you need to dig out of the library

bjornbouetsmith

Connect to console on switch via console cable

Log in with admin/admin unless you changed the default username/password

Type 'enable' hit <enter>
Type 'conf t' hit <enter>
Type 'fae mlxi2c set_fan /MGMT/FAN1 1 25' hit <enter>

This will set fan speed to 25% and not make such noise

bjornbouetsmith

#!/bin/sh
# ESXi script to auto start virtual machine that exports NFS shares to ESXi, i.e. FreeNAS/TrueNAS/whatever

VMNAME=TrueNAS
SHARE=TrueNAS


MAXLOOPSVM=10
MAXLOOPSSHARE=10

bjornbouetsmith

Installed a new FreeNAS and I wanted to apply my usual 10Gbit network tunables.

It turns out it matters a lot in which order you apply them - if you apply them in the wrong order your 
system stops responding and loses network capabilities.

I added net.inet.tcp.sendspace with a value of 4194304 and seconds after my system stopped responding and when logging onto the console 
- I got messages from all network usage no buffer space available

So I looked at the tunables I added with sysctl -a

bjornbouetsmith

You can end up in a situation where Azure DevOps for one pipeline refuses to restore packages 
and for another that references same packages it just works.

I am guessing there is a bug in Microsofts code somewhere.

This can me remedied by adding a default nuget.config to the roaming app data directory for the user that is running the build agents.

i.e. I have an agent running with the username tfsbuildagent

I have created a nuget.config in

bjornbouetsmith

Add these lines to the file /etc/sysctl.conf

#10GBE tuning
kern.ipc.soacceptqueue=2048
kern.ipc.somaxconn=2048
kern.ipc.maxsockbuf=33554432
net.inet.tcp.recvbuf_inc=2097152    # (default 16384)
net.inet.tcp.recvbuf_max=16777216  # (default 2097152)
net.inet.tcp.recvspace=4194304      # (default 65536)

bjornbouetsmith

When creating VIC server with pasted in certs from vsphere it get garbled somehow, 
causing the server not to be able to start the admiral service on the vic server

with an error similar to: 

 start_admiral.sh[8031]: Exception in thread "main" java.lang.RuntimeException: Failed to read PKCS#8 PEM file. file=/configs/server.key

So ssh to the vic server and fix the certs.

when connected:

bjornbouetsmith

vSphere Integrated Containers

* requires that firewall on esxi hosts are updated with the following firewall rule, 
otherwise the containerhosts (vch) cannot communicate properly with the vic host

 <!-- vSphere Integrated Containers Engine to allow outbound 2377/cp -->
  <service id='0044'>
    <id>vic-engine</id>
    <rule id='0000'>
      <direction>outbound</direction>

bjornbouetsmith

#!/bin/sh
echo "Total size in bytes of all vmdk"
stat *flat.vmdk|grep Size|cut -d ' ' -f 5|awk '{ SUM += $1} END { print SUM*512 }'

bjornbouetsmith

#install mbuffer
apt-get install mbuffer

#on receiver side start

mbuffer -s 128k -m 4G -4 -I 9090 | zfs receive -F tank/esxi

#on sender side: