From bd36aad141e95583a69acc72334a0f4d52eac2ed Mon Sep 17 00:00:00 2001
From: Sambo Chea <sombochea@cubetiqs.com>
Date: Tue, 12 Oct 2021 18:06:25 +0700
Subject: [PATCH] Add install kube cluster script and add ingress nginx guide

---
 INGRESS-NGINX.md          |  64 +++++++++++++++++++++
 kube-cluster-install-r.sh | 117 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 181 insertions(+)
 create mode 100644 INGRESS-NGINX.md
 create mode 100644 kube-cluster-install-r.sh

diff --git a/INGRESS-NGINX.md b/INGRESS-NGINX.md
new file mode 100644
index 0000000..3a85663
--- /dev/null
+++ b/INGRESS-NGINX.md
@@ -0,0 +1,64 @@
+# Install NGINX Ingress Controller
+
+- Add Ingress Repository
+
+```shell
+helm repo add cubetiq-ingress-nginx https://charts.ctdn.net/ingress-nginx
+helm repo update
+```
+
+- Install Ingress Controller
+
+```shell
+helm install nginx-ingress cubetiq-ingress-nginx/ingress-nginx --set controller.publishService.enabled=true
+```
+
+NAME: nginx-ingress
+LAST DEPLOYED: Tue Oct 12 15:03:45 2021
+NAMESPACE: default
+STATUS: deployed
+REVISION: 1
+TEST SUITE: None
+NOTES:
+The ingress-nginx controller has been installed.
+It may take a few minutes for the LoadBalancer IP to be available.
+You can watch the status by running 'kubectl --namespace default get services -o wide -w nginx-ingress-ingress-nginx-controller'
+
+An example Ingress that makes use of the controller:
+
+```yaml
+  apiVersion: networking.k8s.io/v1
+  kind: Ingress
+  metadata:
+    annotations:
+      kubernetes.io/ingress.class: nginx
+    name: example
+    namespace: foo
+  spec:
+    rules:
+      - host: www.example.com
+        http:
+          paths:
+            - backend:
+                serviceName: exampleService
+                servicePort: 80
+              path: /
+    # This section is only required if TLS is to be enabled for the Ingress
+    tls:
+        - hosts:
+            - www.example.com
+          secretName: example-tls
+```
+If TLS is enabled for the Ingress, a Secret containing the certificate and key must also be provided:
+
+```yaml
+  apiVersion: v1
+  kind: Secret
+  metadata:
+    name: example-tls
+    namespace: foo
+  data:
+    tls.crt: <base64 encoded cert>
+    tls.key: <base64 encoded key>
+  type: kubernetes.io/tls
+  ```
\ No newline at end of file
diff --git a/kube-cluster-install-r.sh b/kube-cluster-install-r.sh
new file mode 100644
index 0000000..0b80ae3
--- /dev/null
+++ b/kube-cluster-install-r.sh
@@ -0,0 +1,117 @@
+echo "Downloading kubectl..."
+curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
+
+echo "Installing kubectl..."
+sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
+chmod +x kubectl
+mkdir -p ~/.local/bin/kubectl
+mv ./kubectl ~/.local/bin/kubectl
+
+echo "Verify kubectl client version"
+kubectl version --client
+
+echo "Downloading and install helm3..."
+curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+
+echo "Setup network k8s module..."
+cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
+br_netfilter
+EOF
+
+cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-ip6tables = 1
+net.bridge.bridge-nf-call-iptables = 1
+EOF
+
+sudo sysctl --system
+
+echo "Downloading and install CNI plguins..."
+CNI_VERSION="v0.8.2"
+ARCH="amd64"
+sudo mkdir -p /opt/cni/bin
+curl -L "https://github.com/containernetworking/plugins/releases/download/${CNI_VERSION}/cni-plugins-linux-${ARCH}-${CNI_VERSION}.tgz" | sudo tar -C /opt/cni/bin -xz
+
+echo "Downloading and install cri tools..."
+CRICTL_VERSION="v1.17.0"
+ARCH="amd64"
+curl -L "https://github.com/kubernetes-sigs/cri-tools/releases/download/${CRICTL_VERSION}/crictl-${CRICTL_VERSION}-linux-${ARCH}.tar.gz" | sudo tar -C $DOWNLOAD_DIR -xz
+
+echo "Downloading and install kubeadm and kubelet..."
+RELEASE="$(curl -sSL https://dl.k8s.io/release/stable.txt)"
+ARCH="amd64"
+cd $DOWNLOAD_DIR
+sudo curl -L --remote-name-all https://storage.googleapis.com/kubernetes-release/release/${RELEASE}/bin/linux/${ARCH}/{kubeadm,kubelet}
+sudo chmod +x {kubeadm,kubelet}
+
+echo "Setting up kubelet service..."
+RELEASE_VERSION="v0.4.0"
+curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service
+sudo mkdir -p /etc/systemd/system/kubelet.service.d
+curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
+
+echo "Enabling kubelet service..."
+sudo systemctl enable --now kubelet
+
+echo "Verify kubeadm version..."
+kubeadm version
+
+echo "Downloading and setup docker, containerd and tools..."
+sudo swapoff -a
+wget https://sh.osa.cubetiqs.com/docker-setup.sh
+bash docker-setup.sh
+sudo systemctl start docker
+sudo systemctl enable docker
+
+echo "Enabling docker daemon for cgroup driver with systemd"
+cat <<EOF | sudo tee /etc/docker/daemon.json
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2"
+}
+EOF
+
+sudo systemctl daemon-reload
+sudo systemctl restart docker
+
+echo "Installing socat and conntrack for kubernetes cluster..."
+sudo apt-get -y install socat conntrack
+
+echo "Install nfs client tools..."
+sudo apt install nfs-common -y
+
+echo "Setting up containerd and configuration..."
+cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
+overlay
+br_netfilter
+EOF
+
+sudo modprobe overlay
+sudo modprobe br_netfilter
+
+# Setup required sysctl params, these persist across reboots. (If using crio)
+cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
+net.bridge.bridge-nf-call-iptables  = 1
+net.ipv4.ip_forward                 = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+EOF
+
+# Apply sysctl params without reboot
+sudo sysctl --system
+
+sudo mkdir -p /etc/containerd
+containerd config default | sudo tee /etc/containerd/config.toml
+
+sudo systemctl restart containerd
+
+echo "Create directory and config in $HOME/.kube"
+mkdir -p $HOME/.kube
+touch $HOME/.kube/config
+sudo chown $(id -u):$(id -g) $HOME/.kube/config
+chmod o-r $HOME/.kube/config
+chmod g-r $HOME/.kube/config
+
+echo "Finished installation for kubectl, kubeadm and kubelet and some required tools, and now you do cluster :)!"