From 68e1d1112e0694d76ec3698fbfa67a910c6b6d3b Mon Sep 17 00:00:00 2001 From: radinpirouz Date: Thu, 27 Jun 2024 23:46:44 +0330 Subject: [PATCH] Update Kubernets Docs --- kubernetes/info.md | 119 -------------------------------------- kubernetes/information.md | 25 ++++++++ kubernetes/instaltion.md | 67 +++++++++++++++++++++ 3 files changed, 92 insertions(+), 119 deletions(-) delete mode 100644 kubernetes/info.md create mode 100644 kubernetes/information.md create mode 100644 kubernetes/instaltion.md diff --git a/kubernetes/info.md b/kubernetes/info.md deleted file mode 100644 index d7f8f31..0000000 --- a/kubernetes/info.md +++ /dev/null @@ -1,119 +0,0 @@ -# Kubernetes (Kuber) Documentation - -## Control Plane (CP) -- **CP (Control Plane)**: The central management entity of the Kubernetes cluster. -- By default, the manager in Kubernetes does not directly handle any containers. - -## Kubernetes Manager Components -- **Control Manager** -- **Scheduler** -- **API Server** -- **etcd (Database)** -- **Kubelet** - -## Kubernetes Worker Components -- **Kube Proxy** -- **Kubelet** - -## Data Flow -- **Kube Proxy** and **Kubelet** communicate with the Kubernetes Manager for data handling. - -## Administration Tools -- **kubeadm**: Used for administration commands. -- **kubectl**: Used to manage nodes and services. - ---- - -## Kubernetes Setup - -### Step 1: Write Default Config -1. Generate the default containerd configuration. - ```bash - containerd config default > /etc/containerd/config.toml - ``` - -### Step 2: Modify Config -1. Change `systemd_cgroup` to `true`. - ```bash - vim /etc/containerd/config.toml - ``` -2. Restart the containerd service. - ```bash - systemctl restart containerd - ``` - -### Step 3: Load Required Modules -1. Load necessary kernel modules. - ```bash - modprobe br_netfilter overlay - lsmod | grep overlay # To verify the overlay module is loaded - ``` -2. Add the modules to load at boot. - ```bash - vim /etc/modules-load.d/modules.conf - ``` - Add the following lines: - ``` - br_netfilter - overlay - ``` - -### Step 4: Enable IPv4 Forwarding -1. Update Config File - ```bash - sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/' /etc/sysctl.conf && sysctl -p - ``` - - -### Step 5: Install Required Packages -1. Install necessary packages. - ```bash - sudo apt install ca-certificates curl apt-transport-https conntrack -y - ``` - -### Step 6: Install Kubernetes Components -1. Add Kubernetes keyring. - ```bash - curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg - ``` -2. Add Kubernetes to the sources list. - ```bash - echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list - ``` -3. Update package list and install Kubernetes components. - ```bash - sudo apt-get update - sudo apt-get install -y kubelet kubeadm kubectl - ``` -4. Hold the package versions. - ```bash - sudo apt-mark hold kubelet kubeadm kubectl - ``` -5. Enable and start kubelet. - ```bash - sudo systemctl enable --now kubelet - ``` - -### Step 7: Setup Network Protocol -1. Initialize the Kubernetes cluster. - ```bash - kubeadm init --apiserver-advertise-address --pod-network-cidr 10.244.0.0/16 - ``` -2. Apply the Flannel CNI plugin for network management. - ```bash - kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml - ``` -3. Configure kubectl for the current user. - ```bash - mkdir -p $HOME/.kube - sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config - sudo chown $(id -u):$(id -g) $HOME/.kube/config - ``` - -### Step 8: Generate Join Command -1. Generate the command to join worker nodes to the cluster. - ```bash - kubeadm token create --print-join-command - ``` - -This command will print out a token and the complete command to be used on worker nodes to join them to the cluster. diff --git a/kubernetes/information.md b/kubernetes/information.md new file mode 100644 index 0000000..4401693 --- /dev/null +++ b/kubernetes/information.md @@ -0,0 +1,25 @@ +# Kubernetes (Kuber) Documentation + +## Control Plane (CP) +- **CP (Control Plane)**: The central management entity of the Kubernetes cluster. +- By default, the manager in Kubernetes does not directly handle any containers. + +## Kubernetes Manager Components +- **Control Manager** +- **Scheduler** +- **API Server** +- **etcd (Database)** +- **Kubelet** + +## Kubernetes Worker Components +- **Kube Proxy** +- **Kubelet** + +## Data Flow +- **Kube Proxy** and **Kubelet** communicate with the Kubernetes Manager for data handling. + +## Administration Tools +- **kubeadm**: Used for administration commands. +- **kubectl**: Used to manage nodes and services. + +--- diff --git a/kubernetes/instaltion.md b/kubernetes/instaltion.md new file mode 100644 index 0000000..130dba3 --- /dev/null +++ b/kubernetes/instaltion.md @@ -0,0 +1,67 @@ + +--- + +# Containerd and Kubernetes Installation Guide + +## 1. Disable Swap +Turn off swap and disable it permanently. + +```bash +swapoff -a +sed -i '/swap/d' /etc/fstab +``` +## 2. Enable Required Kernel Modules +Create a configuration file to load necessary kernel modules and load them temporarily. +```bash +echo -e "overlay\nbr_netfilter" | sudo tee /etc/modules-load.d/containerd.conf +sudo modprobe overlay +sudo modprobe br_netfilter +``` +## 3. Enable IPv4 Forwarding +Enable IPv4 forwarding in the sysctl configuration and apply the changes. +```bash +sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/' /etc/sysctl.conf +sysctl -p +``` +## 4. Configure Containerd +Generate the default configuration for Containerd and modify it to use systemd as the cgroup driver. +```bash +containerd config default | sudo tee /etc/containerd/config.toml +sudo sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml +``` + +## 5. Install Kubernetes +Add the Kubernetes package repository and install the required packages. +```bash +sudo mkdir -p /etc/apt/keyrings +curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg +echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list +sudo apt-get update +sudo apt-get install -y kubelet kubeadm kubectl +sudo apt-mark hold kubelet kubeadm kubectl +``` +## 6. Enable kubelet +Enable and start the kubelet service. +```bash +sudo systemctl enable --now kubelet +``` +## 7. Initialize the Kubernetes Cluster +Initialize the Kubernetes control plane with the specified parameters. +```bash +sudo kubeadm init --control-plane-endpoint 192.168.2.100 --apiserver-advertise-address 192.168.2.100 --pod-network-cidr 10.244.0.0/16 | tee kuber-install.log +``` +## 8. Create Control Plane Join Command +Create the control plane join command and save it for later use. +```bash +sudo kubeadm init phase upload-certs --upload-certs + +Copy the output certificate key and run the following command, replacing with the copied key. + +sudo kubeadm token create --certificate-key --print-join-command | tee cp-command.txt +``` +## 9. Join Control Plane and Worker Nodes +Use the command from cp-command.txt on your control plane nodes to join them. Additionally, get the join command for worker nodes from kuber-install.log and run it on each worker node. + +--- + +This revised guide provides clear, step-by-step instructions, making it easier to follow and ensuring all necessary actions are covered. \ No newline at end of file