Nurlan199206

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Nurlan199206

docker info - инфо
docker top NAME/CONTAINER ID - показать запущенные процессы
docker stats NAME/CONTAINER ID - показать использование ресурсов
docker-compose up - поднять контейнеры
docker-compose stop - остановить контейнеры
docker-compose stop - остановить контейнеры, а также удалить образы
docker ps - показать запущенные контейнеры
docker ps -a - показать все контейнеры
docker images - отобразить образы в системе
docker run -it container sh - интерактивный режим

Nurlan199206

#keep 1 week of history and 3 months of trends

DELETE FROM history_uint where age(to_timestamp(history_uint.clock)) > interval '1 days';
                                                
delete FROM alerts where age(to_timestamp(alerts.clock)) > interval '7 days';

delete FROM acknowledges where age(to_timestamp(acknowledges.clock)) > interval '7 days';

delete FROM events where age(to_timestamp(events.clock)) > interval '7 days';

Nurlan199206

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Nurlan199206

#!/bin/bash

# Adjust as needed.
#https://www.robustperception.io/using-the-textfile-collector-from-a-shell-script
TEXTFILE_COLLECTOR_DIR=/var/lib/node_exporter/textfile_collector/
# Note the start time of the script.

# Your code goes here.
sleep 10

Nurlan199206

while true; do curl http://35.204.160.171 -d index.php; sleep 1; done

curl -sL https://nationalbank.kz/rss/rates_all.xml | xmllint --format - --xpath "string(//rss/channel/item" | awk '{print$1}' | grep -E 'title|description' | sed -e 's/[^A-Z^0-9^.]//g' | awk 'NR >= 11 && NR <= 12'

Nurlan199206

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
 name: website.kz
spec:
 backend:
   serviceName: nginx
   servicePort: 80
 rules:
 - host: website.kz

Nurlan199206

kubectl get pods && kubectl get services - список подов и сервисов IP:PORT

kubectl delete service,deployment nginx - удалить сервис и поды nginx

kubectl logs nginx-6dd86d77d-48tn4 - посмотреть логи контейнера

kubectl exec -ti nginx-6dd86d77d-48tn4 bash - интерактивный режим bash

kubectl expose deployment nginx --type=NodePort --port=80 - выставить сервис наружу

Nurlan199206

kubernetes commands

=============================================certificates renew======================================

kubeadm certs check-expiration

kubeadm certs renew all 

and restart etcd, kube-apiserver, kube-scheduler, kube-control-manager on the all control planes

Nurlan199206

sum(container_memory_usage_bytes{container_name!="POD",container_name!=""}) by (pod_name) - Memory usages per pod

sum(rate(container_cpu_usage_seconds_total{container_name!="POD",pod_name!=""}[5m])) by (pod_name) - CPU usage per container

sum(rate(container_network_receive_bytes_total{namespace="default"}[5m])) by (name) - IN
sum(rate(container_network_transmit_bytes_total{namespace="default"}[5m])) by (name) - OUT