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https://youtu.be/CBXvt5I2vHI

[post_title] => Celebrating Keyva's 5 Year Anniversary [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => celebrating-keyvas-5-year-anniversary [to_ping] => [pinged] => [post_modified] => 2024-05-15 19:44:33 [post_modified_gmt] => 2024-05-15 19:44:33 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3784 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [1] => WP_Post Object ( [ID] => 3782 [post_author] => 7 [post_date] => 2023-05-15 08:30:00 [post_date_gmt] => 2023-05-15 08:30:00 [post_content] =>

https://youtu.be/tc9qbVEeF2E

Keyva Chief Technology Officer Anuj Tuli discusses how DevSecOps allows security to be innately tied to the development and operational work being done by IT teams.

[post_title] => CTO Talks: DevSecOps - Security in a Digital Era is a Top Concern [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => cto-talks-devsecops-security-in-a-digital-era-is-a-top-concern [to_ping] => [pinged] => [post_modified] => 2024-05-15 19:41:48 [post_modified_gmt] => 2024-05-15 19:41:48 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3782 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => WP_Post Object ( [ID] => 3830 [post_author] => 16 [post_date] => 2023-04-21 17:03:12 [post_date_gmt] => 2023-04-21 17:03:12 [post_content] =>

This article reviews the process to set up a Kubernetes cluster using docker container runtime with 1 master node and 1 worker node on VMware based RHEL 8 instances.

All the commands listed will be ran against both the master and worker node.

Let’s start by enabling the RedHat repos.

#Setup RHEL subscription
subscription-manager register
subscription-manager refresh
 
#Install commonly used repos
subscription-manager repos --enable  rhel-8-for-x86_64-baseos-rpms
subscription-manager repos --enable rhel-8-for-x86_64-appstream-rpms

Update the Yum repositories.

yum update -y
install yum-utils

Since this is a lab environment, we will be disabling firewalls. If it is a production environment, you can open specific ports for communication of your applications, and for Kubernetes components instead of disabling the firewall completely. (For a list of the required ports see: https://kubernetes.io/docs/reference/networking/ports-and-protocols/)

#Disable firewall
systemctl disable firewalld 
systemctl stop firewalld

Swap disabled. You MUST disable swap in order for the Kubelet to work properly.

swapoff –a

#Comment out the swap line
etc/fstab 
#/dev/mapper/rhel-swap   swap                    swap    defaults        0 0   

Install Docker and Dockerd Container runtime.

#Installing Docker
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
dnf repolist -v
sudo yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y
systemctl enable docker
systemctl start docker

 ###Install docker Docker Container Runtime
git clone https://github.com/Mirantis/cri-dockerd.git
# Run these commands as root
###Install GO###
wget https://storage.googleapis.com/golang/getgo/installer_linux
chmod +x ./installer_linux
./installer_linux
source ~/.bash_profile
cd cri-dockerd
mkdir bin
go build -o bin/cri-dockerd
mkdir -p /usr/local/bin
install -o root -g root -m 0755 bin/cri-dockerd /usr/local/bin/cri-dockerd
cp -a packaging/systemd/* /etc/systemd/system
sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service
systemctl daemon-reload
systemctl enable cri-docker.service
systemctl enable --now cri-docker.socket

Installing Kubeadm, Kubelet and Kubectl.

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF
 
# Set SELinux in permissive mode (effectively disabling it)
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
 
sudo yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
 
sudo systemctl enable --now kubelet  

Forwarding IPv4 and letting iptables see bridged traffic.

overlay
br_netfilter
EOF
 
sudo modprobe overlay
sudo modprobe br_netfilter
 
# sysctl params required by setup, params persist across reboots
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF
 
# Apply sysctl params without reboot
sudo sysctl --system 

ON MASTER NODE ONLY

Deploy the cluster via Kubeadm then deploy the Flannel networking component.

#Deploy the Kubernetes cluster specifying the cluster network cidr and the container runtime
kubeadm init --pod-network-cidr=10.244.0.0/16 --cri-socket /run/cri-dockerd.sock

#After deploying the cluster you will receive a join command which you will save to run on the worker node. 

kubeadm join masternode.bpic.local:6443 --token cll0gw.50jagb64e80uw0da \ 
    --discovery-token-ca-cert-hash sha256:4d699e7f06ce0e7e80b78eadc47453e465358021aee52d956dceed1dfbc0ee34
###On Master Nodes only w/ non root user
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
export KUBECONFIG=~/.kube/config

Deploy Flannel as the non-root user
kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml

ON WORKER NODE ONLY

Run the join command to add the node to the cluster.

#Join the node to the cluster
kubeadm join masternode.bpic.local:6443 --token cll0gw.50jagb64e80uw0da \ 
    --discovery-token-ca-cert-hash sha256:4d699e7f06ce0e7e80b78eadc47453e465358021aee52d956dceed1dfbc0ee34

After joining the worker node to the cluster run the following on the master node to confirm cluster status.

kubectl get nodes -o wide

#The result should look similar to the following

NAME     STATUS   ROLES         AGE   VERSION  INTERNAL-IP     OS-IMAGE                      CONTAINER-RUNTIME
master   Ready    control-plane 2d5h  v1.25.0  192.168.16.73   Red Hat Enterprise Linux 8.7  docker://23.0.4
worker1  Ready    <none>        2d1h  v1.25.0  192.168.16.153  Red Hat Enterprise Linux 8.7  docker://23.0.4

About the Author

[table id =6 /]

[post_title] => How to set up a Kubernetes cluster with Dockerd container runtime on Red Hat Enterprise Linux 8 [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => how-to-set-up-a-kubernetes-cluster-with-dockerd-container-runtime-on-red-hat-enterprise-linux-8 [to_ping] => [pinged] => [post_modified] => 2023-05-15 15:11:18 [post_modified_gmt] => 2023-05-15 15:11:18 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3830 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [3] => WP_Post Object ( [ID] => 3827 [post_author] => 7 [post_date] => 2023-04-18 14:46:53 [post_date_gmt] => 2023-04-18 14:46:53 [post_content] => [post_title] => Case Study: IT Modernized [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => case-study-it-modernized [to_ping] => [pinged] => [post_modified] => 2024-05-15 20:12:25 [post_modified_gmt] => 2024-05-15 20:12:25 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3827 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [4] => WP_Post Object ( [ID] => 3824 [post_author] => 7 [post_date] => 2023-04-18 14:45:32 [post_date_gmt] => 2023-04-18 14:45:32 [post_content] => [post_title] => Case Study: Infrastructure Modernized for Business Critical Application [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => case-study-infrastructure-modernized-for-business-critical-application [to_ping] => [pinged] => [post_modified] => 2024-05-15 20:13:12 [post_modified_gmt] => 2024-05-15 20:13:12 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3824 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [5] => WP_Post Object ( [ID] => 3814 [post_author] => 7 [post_date] => 2023-04-18 14:34:57 [post_date_gmt] => 2023-04-18 14:34:57 [post_content] => [post_title] => Case Study: Cloud Infrastructure Consolidation [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => cloud-infrastructure-consolidation [to_ping] => [pinged] => [post_modified] => 2024-05-15 20:14:07 [post_modified_gmt] => 2024-05-15 20:14:07 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3814 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [6] => WP_Post Object ( [ID] => 3779 [post_author] => 7 [post_date] => 2023-04-06 08:30:00 [post_date_gmt] => 2023-04-06 08:30:00 [post_content] =>

https://youtu.be/1LKSZJ-6QeQ

Keyva Chief Technology Officer Anuj Tuli celebrates the organization's 5th Anniversary and discusses lessons learned over the last five years.

[post_title] => CTO Talks: Keyva 5th Anniversary - Lessons Learned [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => cto-talks-keyva-5th-anniversary-lessons-learned [to_ping] => [pinged] => [post_modified] => 2024-05-15 20:19:44 [post_modified_gmt] => 2024-05-15 20:19:44 [post_content_filtered] => [post_parent] => 0 [guid] => https://keyvatech.com/?p=3779 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [7] => WP_Post Object ( [ID] => 3753 [post_author] => 14 [post_date] => 2023-03-16 13:44:01 [post_date_gmt] => 2023-03-16 13:44:01 [post_content] =>

By: Saikrishna Madupu – Sr Devops Engineer

This blog describes how to incorporate an extensive quantity of current AWS infrastructure into Terraform. This process is relevant to an organization that manually constructed its AWS infrastructure and wants to implement it in Terraform code for improved automation and cost savings. This is a substantial undertaking with a number of benefits. 

• First, a brief description of TerraCognita.  TerraCognita is a tool that helps import existing infrastructure from AWS, Google Private Cloud, AzureRM and VMware vSphere cloud providers as Terraform (v1.1.9) resource/state.¹ 

I discovered through study that Terraform import only permits the import of a single resource at a time. You will need to import resources into one account at a time if you wish to build up your organization in the cloud at this time because there is no possibility to import resources into several accounts at the same time.  

Adding TerraCognita will allow you to import a rather large file including a variety of variables. Using a flag, you have the ability to import only particular variables into a program. You can leverage the same strategy to restrict the variables that are generated by the variable.tf file. 
Installation:

Go Libraries: 
You can build and install with the latest sources. It uses Go Modules, so GO 1.17+ is required. 

• git clone https://github.com/cycloidio/terracognita 
• cd terracognita
• make install

Linux:

curl -L https://github.com/cycloidio/terracognita/releases/latest/download/terracognita-linux-amd64.tar.gz -o terracognita-linux-amd64.tar.gz 
tar -xf terracognita-linux-amd64.tar.gz
chmod u+x terracognita-linux-amd64 
sudo mv terracognita-linux-amd64 /usr/local/bin/terracognita 

MacOs:

brew install terracognita

Prerequisites:

• Cloud account 
• CLI installed and configured regardless of the cloud you use 
• Terraform  

Use Cases:

Sample CLI command to import all s3 buckets for AWS: 

1. Importing the s3 bucket which was created manually and manage it using Terraform IAC to handle its configuration using TerraCongita:

terracognita aws --hcl s3 --tfstate terraform.tfstate --aws-default-region us-east-1 -i aws_s3_bucket 

Returns Output:

terracognita-s3 % terracognita aws --hcl s3 --tfstate terraform.tfstate --aws-default-region us-east-1 -i aws_s3_bucket 
We are about to remove all content from "s3", are you sure? Yes/No (Y/N): 
y 
Starting Terracognita with version v0.8.1 
Importing with filters:  
    Tags:    [], 
    Include: [aws_s3_bucket],
    Exclude: [],
    Targets: [], 
Importing aws_s3_bucket [6/6] Done! 
Writing HCL Done! 
Writing TFState Done! 
saikrishnamadupu@Administrators-MacBook-Pro terracognita-s3 % ls -ltr
total 32 
-rw-r--r--  1 saikrishnamadupu  staff  13164 Feb 12 00:07 terraform.tfstate 
drwx------  4 saikrishnamadupu  staff    128 Feb 12 00:07 s3 

It returns all the buckets info into the folder called s3 where it contains s3_storage.tf file that contains all the buckets list and its configuration. 

 Post-import manual work: 

1. TerraCognita does not make a versions.tf file on its own, you will need to copy the information from the module file, where it is automatically generated, and paste it into a versions.tf file on your own if one is needed. 

2. TerraCognita does not produce any outputs.tf files of its own. You are responsible for creating them if they are necessary. 

Supported providers: 

• Aws: v4.9.0 
• AzureRM: v3.6.0 
• Google: v4.9.0 
• vSphere: v2.2.0 

Ref: Terracognita

About the Author

[table id =5 /]

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https://youtu.be/CBXvt5I2vHI

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