Month: May 2023

python check palindrome fast way

import sys

arg = sys.argv[1]
arg_length = len(sys.argv[1])

print("arg_length: ",arg_length)

def palindrome(arg, arg_length):
    for i in range(0,int(arg_length/2)): # for checking half string
        if arg[i] != arg[arg_length-i-1]:
            return False
    return True

print(palindrome(arg, arg_length))

Output:

[home@fedora ~]$ python3 palidrom.py 11211
arg_length:  5
True
[home@fedora ~]$ python3 palidrom.py noon
arg_length:  4
True
[home@fedora ~]$ python3 palidrom.py qwerty
arg_length:  6
False

kubernetes deployment scale up/down with bash

scale down deploy on weeknend:

####scale down####
namespaces="test,test2"
IFS=","

for namespace in $namespaces
do
    deployments=$(kubectl get deploy -n $namespace | grep -v '0/0' | awk '{print $1}' | sed 1d | tr '\n' ' ')
    IFS=" "
    for deploy in $deployments
    do
        replicas="$(kubectl get deploy $deploy -o=custom-columns='REPLICAS:spec.replicas' -n $namespace | sed 1d | tr '\n' ' ')"
        echo "namespace: $namespace deploy: $deploy replicas: $replicas"
        kubectl label deploy $deploy weekdays-replicas=$replicas -n $namespace --overwrite=true
        kubectl scale --replicas=0 statefulset $deploy -n "$namespace" || true
    done
done

scale-up:

####scale up####
namespaces="test,test2"
IFS=","
for namespace in $namespaces
do
    deployments=$(kubectl get deploy -n $namespace | awk '{print $1}' | sed 1d | tr '\n' ' ')
    IFS=" "
    for deploy in $deployments
    do
        replicas="$(kubectl get deploy $deploy -o=custom-columns='REPLICAS:metadata.labels.weekdays-replicas' -n $namespace | sed 1d | tr '\n' ' ')"
        echo "kubectl scale --replicas=$replicas statefulset $deploy -n "$namespace" || true"
    done
done

wordpress proxy with nginx

Error:

Mixed Content: The page at ” was loaded over HTTPS, but requested an insecure stylesheet ”. This request has been blocked; the content must be served over HTTPS.

  • install nginx with $IP_ADDRESS:8080 
version: '3.1'

services:
  wordpress:
    image: wordpress:6.2.0
    restart: always
    ports:
      - 8080:80
    volumes:
      - ./wordpress:/var/www/html

  db:
    image: mysql:5.7.39
    restart: always
    ports:
      - 3310:3306
    environment:
      MYSQL_ROOT_PASSWORD: root
    volumes:
      - ./mysql:/var/lib/mysql
  • Update https://test.example.com inside wordpress admin panel
worpress-nginx-proxy
  • update wp-config.php

define('FORCE_SSL_ADMIN', true);
if ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && strpos( $_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') !== false ) {
$_SERVER['HTTPS'] = 'on';
}

  • /etc/nginx/conf.d/test.exmaple.conf nginx config
server {
    server_name test.example.com;
    location / {
        proxy_pass http://10.209.229.54:8080/; 
        proxy_http_version 1.1;
        proxy_buffering off;
        proxy_read_timeout    90;
        proxy_connect_timeout 90;
        proxy_redirect        off;
        proxy_set_header Host $host;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Port 443;
        proxy_set_header Proxy "";
    }

    listen 443 ssl;
    ssl_certificate /etc/nginx/ssl/cert.pem;
    ssl_certificate_key /etc/nginx/ssl/key.pem;

}

server {
    if ($host = test.example.com) {
        return 301 https://$host$request_uri;
    }
    server_name test.example.com;
    listen 80;
    return 404;
}

Reference:

Administration Over SSL