On Apache server, React Application works fine, but if you refresh a page, it shows 404 error. This is because the application use BrowserRouter. To fix the error, create a .htaccess file with following content
|
1 2 3 4 |
RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^ index.html [QSA,L] |
Put this on the folder where your application index.html is or in Apache Virtual Host entry. See htaccess […]
CyberPanel is a free open source control panel for web hosting. It use OpenLiteSpeed web server. You have the option to use Commercial LiteSpeed web server with CyberPanel. To change SSH port on CyberPanel server, login to CyberPanel, then go to
|
1 |
Securiy > Secure SSH |
From the left side menu. On next page, you will get option to […]
I want all my SSH connection go through a VPS so my IP address stay same even if my ISP changes IP. This help me to only access SSH access from my VPS IP address, this increase security as no one else able to SSH to the server. To force all my SSH connection to […]
Amazon Elastic Container Registry is used to store docker images in Amazon AWS cloud. To create a repository using awscli command line tool, run
|
1 |
aws ecr create-repository --repository-name sok-repository --region ap-southeast-1 |
In Amazon AWS console, you can see the newly created repository by going to “Elastic Container Registry” page in the region where you created the repository. https://ap-southeast-1.console.aws.amazon.com/ecr/repositories?region=ap-southeast-1 To see the […]
To create a docker container with Apache, create a Dockerfile
|
1 2 3 |
mkdir my-app cd my-app vi Dockerfile |
Paste following content into the Dockerfile
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
from ubuntu:20.04 ARG DEBIAN_FRONTEND=noninteractive RUN apt-get update && apt-get install -y apache2 RUN echo 'Hello World!' > /var/www/html/index.html RUN echo '. /etc/apache2/envvars' > /root/run_apache.sh && \ echo 'mkdir -p /var/run/apache2' >> /root/run_apache.sh && \ echo 'mkdir -p /var/lock/apache2' >> /root/run_apache.sh && \ echo '/usr/sbin/apache2 -D FOREGROUND' >> /root/run_apache.sh && \ chmod 755 /root/run_apache.sh EXPOSE 80 CMD /root/run_apache.sh |
Now build an image with command
|
1 |
docker build -t sevrerok/okapache:1.0 . |
Once image is build, you can see it using docker images command
|
1 2 3 4 5 6 7 |
[root@instance-20210426-0136 my-app]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE sevrerok/okapache 1.2 c3832b03b548 8 minutes ago 214MB sevrerok/okapache 1.1 d1a86f0eb69a 37 minutes ago 214MB ubuntu 20.04 7e0aa2d69a15 2 days ago 72.7MB sevrerok/okapache 1.0 7e0aa2d69a15 2 days ago 72.7MB [root@instance-20210426-0136 my-app]# |
To start a container with the image, run
|
1 |
docker container run -d -p 80:80 sevrerok/okapache:1.0 |
See docker build […]
This bash script check web site every 5 minutes, restart the web server if web site is not responding. Create a file
|
1 2 |
mkdir /usr/serverok vi /usr/serverok/check_httpd.sh |
Add
|
1 2 3 4 5 6 7 8 9 10 11 12 |
#!/bin/bash # Author: Yujin Boby # Web: https://serverok.in # Email: [email protected] /usr/bin/wget --tries=1 --timeout=30 -O /dev/null https://YOUR_DOMAIN.EXTN/ if [ $? -ne 0 ]; then systemctl restart httpd datetime=`date "+%Y%m%d %H:%M:%S"` echo $datetime "failure">>/var/log/sok-web.log fi |
In above code, replace https://YOUR_DOMAIN.EXTN/ with your sites actual url. Make it executable
|
1 |
chmod 755 /usr/serverok/check_httpd.sh |
Create a cronjob
|
1 |
crontab -e |
Add
|
1 |
*/5 * * * * /usr/serverok/check_httpd.sh > /dev/null 2>&1 |
See Server Monitoring […]
CloudPanel is a free hosting control panel, that make deploying web application on cloud easier. It use Nginx web server, support multile PHP versions, comes with nginx configuration for various popular CMS and web applications. https://www.cloudpanel.io/ Install CloudPanel CloudPanel need a server with Debian 10. To install CloudPanel, run
|
1 2 |
apt update && apt -y upgrade && apt -y install curl wget sudo curl -sSL https://installer.cloudpanel.io/ce/v1/install.sh | sudo bash |
After install you can access […]
To redirect a site to url with www using PHP, you can use following PHP code
|
1 2 3 4 5 6 7 8 9 10 |
<?php $domainName = $_SERVER['HTTP_HOST']; if (strpos($domainName, 'www') === false) { header("HTTP/1.1 301 Moved Permanently"); $urlNew = 'https://www.' . $domainName . $_SERVER['REQUEST_URI']; Header("Location: $newUrl"); exit; } |
Add this code in your index.php file or another file included by index.php See Redirect […]
To check and repair all databases in a database run
|
1 |
mysqlcheck -A --auto-repair -u root -p |
Forcefully optimize all tables, automatically fixing table errors that may come up.
|
1 |
mysqlcheck -A --auto-repair -f -o -u root -p |
To check all databases
|
1 |
mysqlcheck --all-databases -u root -p -c |
To analyze all tables in all databases:
|
1 |
mysqlcheck --all-databases -u root -p -a |
To repair all tables in all databases:
|
1 |
mysqlcheck --all-databases -u root -p -r |
To optimize all tables in all databases:
|
1 |
mysqlcheck --all-databases -u root -p -o |
See MySQL […]
To install microk8s, run
|
1 |
sudo snap install microk8s --classic |
Enable rules in firewall
|
1 2 3 |
sudo ufw allow in on cni0 sudo ufw allow out on cni0 sudo ufw default allow routed |
Enable addons
|
1 |
microk8s enable dns dashboard storage |
To see status of current addons, run
|
1 |
microk8s status |
Here is status for a defaul install
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 |
root@ip-172-26-0-217:~# microk8s status microk8s is running high-availability: no datastore master nodes: 127.0.0.1:19001 datastore standby nodes: none addons: enabled: ha-cluster # Configure high availability on the current node disabled: ambassador # Ambassador API Gateway and Ingress cilium # SDN, fast with full network policy dashboard # The Kubernetes dashboard dns # CoreDNS fluentd # Elasticsearch-Fluentd-Kibana logging and monitoring gpu # Automatic enablement of Nvidia CUDA helm # Helm 2 - the package manager for Kubernetes helm3 # Helm 3 - Kubernetes package manager host-access # Allow Pods connecting to Host services smoothly ingress # Ingress controller for external access istio # Core Istio service mesh services jaeger # Kubernetes Jaeger operator with its simple config keda # Kubernetes-based Event Driven Autoscaling knative # The Knative framework on Kubernetes. kubeflow # Kubeflow for easy ML deployments linkerd # Linkerd is a service mesh for Kubernetes and other frameworks metallb # Loadbalancer for your Kubernetes cluster metrics-server # K8s Metrics Server for API access to service metrics multus # Multus CNI enables attaching multiple network interfaces to pods portainer # Portainer UI for your Kubernetes cluster prometheus # Prometheus operator for monitoring and logging rbac # Role-Based Access Control for authorisation registry # Private image registry exposed on localhost:32000 storage # Storage class; allocates storage from host directory traefik # traefik Ingress controller for external access root@ip-172-26-0-217:~# |
To see all pods/services/deploymens, run
|
1 |
microk8s kubectl get all --all-namespaces |
To avoid typing microk8s before kubectl, run
|
1 |
alias kubectl="microk8s kubectl" |
You can add this to .bashrc to make it permanent. To run […]