huynhbaoan

# Create user-defined overlay network
Prerequisites:
Firewall rules for Docker daemons using overlay networks
You need the following ports open to traffic to and from each Docker host participating on an overlay network:
"TCP port 2377 for cluster management communications
TCP and UDP port 7946 for communication among nodes
UDP port 4789 for overlay network traffic"
Before you can create an overlay network, you need to either initialize your Docker daemon as a swarm manager using: docker swarm init
or join it to an existing swarm using: docker swarm join
Either of these creates the default ingress overlay network which is used by swarm services by default. You need to do this even if you never plan to use swarm services. Afterward, you can create additional user-defined overlay networks.

huynhbaoan

###
### This gist contains 2 files : settings.json and lambda_function.py
###

### settings.json
{
    "extensions" : ["*.hdr", "*.glb", "*.wasm"]
}

### lambda_function.py

huynhbaoan

Different from bash, PowerShell is object-orriented. Understanding objects are necessary to utilize PowerShell

 Get-NetIPAddress -AddressFamily IPV4 -AddressState Preferred -IncludeAllCompartments | Get-Member


   TypeName: Microsoft.Management.Infrastructure.CimInstance#ROOT/StandardCimv2/MSFT_NetIPAddress

Name                      MemberType     Definition
----                      ----------     ----------
ifIndex                   AliasProperty  ifIndex = InterfaceIndex

huynhbaoan

# Generate du command to check disk
# Ignore all the mount points nfs4. Modify the "df -t nfs4" as you want
# Run with lowest CPU priority and lowest diskio priority

# extract the content from the last column and store it in an array
IFS=$'\n' read -d '' -ra MOUNT_POINTS <<< "$(df -h -t nfs4 | awk '{print $NF}')"

# construct the new du command with the excluded mount points
DU_COMMAND="nice -n 19 ionice -c 3 du -shxc /* --exclude=/proc"
for mount_point in "${MOUNT_POINTS[@]}"; do

huynhbaoan

## Clone a running OS from SD card to USD SSD, Raspberry 4B 8G

### Main guide
https://medium.com/xster-tech/move-your-existing-raspberry-pi-4-ubuntu-install-from-sd-card-to-usb-ssd-52e99723f07b

### References:
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-boot-modes
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-4-boot-flow
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-4-boot-eeprom

huynhbaoan

## I. Important references
https://developer.hashicorp.com/terraform/language/
https://developer.hashicorp.com/terraform/cloud-docs
https://registry.terraform.io/providers/hashicorp/aws/latest/docs

### 1. Some points
Terraform HCL is similar to C syntax in some ways
- Comment: #, //, /* ... */
- Block: <type> <label> { ... }
- As I understand: 

huynhbaoan

#### Alarm fatigue. When everything is urgent, nothing is urgent 
https://dev.to/dvddpl/when-everything-is-urgent-nothing-is-what-is-alarm-fatigue-and-how-to-deal-with-it-1321

#### ECS Desired task count
https://dev.to/aws-builders/understanding-the-desiredcount-and-autoscaling-behaviour-of-aws-fargate-fuckups-and-learnings-4e0

#### Blameless culture. Make mistake and ask question. Psychology safety in work
https://dev.to/dvddpl/make-mistakes-and-ask-questions-its-ok-gah

huynhbaoan

from bs4 import BeautifulSoup
import csv
import requests

# URL of the static HTML page
url = 'https://example.com/static-page.html'  # Replace with your actual URL

# Fetch the page content
response = requests.get(url)

huynhbaoan

grep -E '2024/(07|08|09)' $1 | awk -F, '
BEGIN {
    sum_cpu_avg = 0;
    sum_cpu_max = 0;
    max_cpu_avg = 0;
    max_cpu_max = 0;
    count = 0;
}
{
    sum_cpu_avg += $2;