Kubernetes is built with three main components, Master, Node, and Addons, what is it in details. Let’s take a look at this tutorial, First of all, about the Master component. This component can be considered as the heart of Kubernetes, built to manage all operations,… Read More
In the previous tutorial, I showed you how to install OpenShift using Docker and oc tool on macOS, installing OpenShift using these two tools on CentOS has some differences. I will guide you in this tutorial! First, you need to install the Docker. For oc… Read More
I showed you how to install Docker on Ubuntu. Installing Docker on CentOS is much simpler, just open Terminal, then run the following command:
|
1 |
sudo yum install docker |
to install Docker. After installation is complete, please start Docker up with the following command:
|
1 |
sudo service docker start |
To test the results,… Read More
After creating a project in OpenShift, what we need to do to work with OpenShift is deploying an application to it. We can use the web console or client tool oc to create a new application in OpenShift. In this tutorial, I will guide you… Read More
By default, after installing OpenShift, a project called “My Project” will be created. That is why when you login to OpenShift using client tool oc or web console, you will also see the project “My Project” here. Or To create a new project in OpenShift,… Read More
When working with networks that require security, if we request to sites that use HTTPS, we will often encounter issues related to the SSL certificate, my example is as follows:
|
1 2 3 4 5 6 7 |
[docker@minishift ~]$ curl https://auth.docker.io curl: (60) Peer's certificate issuer has been marked as not trusted by the user. More details here: http://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option. |
To resolve this error, we need to download the certificate for that site and… Read More
You already know about Docker and Kubernetes with their benefits in developing, deploying, and running applications on production environments. To make it easy and convenient to use Docker and Kubernetes, a platform called OpenShift has been introduced. OpenShift will make us easy to create Docker… Read More
OpenShift from version 3 onwards allows us to work with it using Command Line Interface (CLI) called oc, web console or using JBoss tool. In this tutorial, I will show you how to install this CLI on macOS to work with OpenShift! First, you need… Read More
We have learned how to handle a request in Javalin, in this tutorial, we will continue to learn how to work with the response in Javalin! I also created a Maven project as an example, as follows: Javalin and SLF4J Simple dependency are as follows:
|
1 2 3 4 5 6 7 8 9 10 |
<dependency> <groupId>io.javalin</groupId> <artifactId>javalin</artifactId> <version>2.8.0</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.7.26</version> </dependency> |
I introduced you to Javalin, in this tutorial we will learn more about how we will handle requests in the Javalin framework! I also created a Maven project as an example: Javalin and SLF4J Simple dependency are as follows:
|
1 2 3 4 5 6 7 8 9 10 |
<dependency> <groupId>io.javalin</groupId> <artifactId>javalin</artifactId> <version>2.8.0</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.7.26</version> </dependency> |
I also created a class… Read More
