test

.env.example

@@ -0,0 +1,13 @@
+export KUBE_USER="ubuntu"
+export PRIVATE_KEY_PATH="$HOME/.ssh/id_ed25519"
+export KUBE_CP="k8s-control-plane"
+## Add workers to this list!
+export KUBE_WORKERS=("k8s-worker1")
+export ANSIBLE_DIR="ansible"
+export POD_NET_CIDR="192.168.0.0/16"
+export CNI_VER="v3.30.2"
+export API_ADDR=$(getent hosts "$KUBE_CP" | awk '{ print $1 }')
+export ACME_MAIL="name@mail.example"
+export IP_POOL_RANGE="192.168.1.10-192.168.1.20"
+export LOAD_BALANCER_IP="192.168.1.10"
+export LONGHORN_DNS_NAME="longhorn.domain.tld"

.gitignore

@@ -0,0 +1 @@
+.env

LICENSE

@@ -0,0 +1,201 @@
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README.md

@@ -1,6 +1,8 @@
 # Kubernetes Cluster Deployment Guide
 
-This guide describes how to deploy a Kubernetes cluster tailored to your environment using the provided `redbutton.sh` script.
+This guide describes how to deploy a Kubernetes cluster tailored to my environment using the provided `redbutton.sh` script.
+
+Just be sure to edit the variables in the `redbutton.sh` script. I think you can scale this out by adding more hosts and adjusting the for loop but I haven't tried it yet. I needed four machines and that is what I worked with.
 
 ## ⚙️ Pre-requisites
 
@@ -17,19 +19,25 @@ This setup will create a Kubernetes cluster with the following topology and comp
 - **1 Control Plane Node**
 - **2 Worker Nodes**
 - **Calico** as the CNI (Container Network Interface)
-- **MetalLB** as the cloud load balancer for bare metal services (change the configmap to adapt it to your network)
+- **MetalLB** as the cloud load balancer for bare metal services on your desired range
-- **Traefik** as the ingress controller on IP 10.50.3.30 (change it in the values.yaml to adapt it to your network)
+- **Traefik** as the ingress controller on your desired IP
-- **Longhorn** as the persistent storage provider (change the host to adapt it to your network)
+- **Cert-Manager** to manage the internal certificates. Remember to set the API Key!
+- **Longhorn** as the persistent storage provider to your desired hostname
 
 ## 🚀 How to Deploy
 
 To initiate the deployment, run the provided script:
 
 ```bash
-chmod +x init-deploy.sh
+cp .env.example .env
-chmod +x helm-deploy.sh
+
+echo "export CF_API=YourSuperSecretAPIKey" >> .env
+
 chmod +x redbutton.sh
+
 ./redbutton.sh
 ```
 
+May the kubelets be ever in your favor, and your etcd never split! 
+
 ![alt text](robotnik.png)

ansible/install_cni.yaml

@@ -1,14 +0,0 @@
-- name: Install Kubernetes CNI
-  hosts: k8s_control_plane
-  become: true
-  tasks:
-    - name: Download Calico manifest
-      get_url:
-        url: https://raw.githubusercontent.com/projectcalico/calico/v3.27.3/manifests/calico.yaml
-        dest: /tmp/calico.yaml
-        mode: '0644'
-
-    - name: Apply Calico CNI plugin
-      shell: kubectl apply -f /tmp/calico.yaml
-      environment:
-        KUBECONFIG: /etc/kubernetes/admin.conf

ansible/inventory.ini

@@ -1,10 +0,0 @@
-[k8s_control_plane]
-k8s-control-plane
-
-[k8s_nodes]
-k8s-worker1
-k8s-worker2
-
-[all:vars]
-ansible_user=kevin
-ansible_ssh_private_key_file=~/.ssh/id_rsa

ansible/k8s-init.yaml

@@ -1,43 +0,0 @@
-- name: Initialize Kubernetes Control Plane
-  hosts: k8s_control_plane
-  become: true
-  vars:
-    ## This is the default networkd of Calico
-    pod_network_cidr: "192.168.0.0/16"
-    apiserver_advertise_address: "10.50.3.21"
-    cri_socket: "unix:///run/containerd/containerd.sock"
-    kubeconfig_src: "/etc/kubernetes/admin.conf"
-    kubeconfig_dest: "/home/{{ ansible_user }}/.kube/config"
-
-## Crea la directory .kube nella home dell'utente
-
-  tasks:
-    - name: Ensure .kube directory exists
-      file:
-        path: "/home/{{ ansible_user }}/.kube"
-        state: directory
-        owner: "{{ ansible_user }}"
-        group: "{{ ansible_user }}"
-        mode: '0755'
-
-## Crea il cluster con i parametri indicati sopra
-
-    - name: Run kubeadm init
-      command: >
-        kubeadm init
-        --pod-network-cidr={{ pod_network_cidr }}
-        --apiserver-advertise-address={{ apiserver_advertise_address }}
-        --cri-socket {{ cri_socket }}
-      args:
-        creates: /etc/kubernetes/pki/ca.crt
-
-## Copia la configurazione del cluster così da poter eseguire comandi kubectl dall'utente
-
-    - name: Copy admin.conf to user's kube config
-      copy:
-        src: "{{ kubeconfig_src }}"
-        dest: "{{ kubeconfig_dest }}"
-        remote_src: true
-        owner: "{{ ansible_user }}"
-        group: "{{ ansible_user }}"
-        mode: '0644'

ansible/k8s-install-deps.yaml

@@ -3,106 +3,96 @@
   become: true
 
   tasks:
-    - name: Ensure apt cache is updated
+    - name: Add Docker signing key
-      apt:
+      ansible.builtin.apt_key:
-        update_cache: yes
+        url: https://download.docker.com/linux/ubuntu/gpg
-        cache_valid_time: 3600
+        state: present
+
+    - name: Add Docker repository
+      ansible.builtin.apt_repository:
+        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu noble stable
+        state: present
 
     - name: Install required packages
-      apt:
+      ansible.builtin.apt:
         name:
           - apt-transport-https
           - ca-certificates
           - curl
           - gpg
-          - containerd
+          - containerd.io
         state: present
+        update_cache: yes
 
 ## Questo non è nella documentazione! bisogna generare il file di configurazione di containerd
-## ed scriverlo nella directory apposita, altrimenti usa un suo default che non va bene
+## ed scriverlo nella directory apposita, altrimenti usa un suo default che non va bene.
 
-    - name: Ensure containerd config directory exists
+    - name: Ensure containerd config directory exists.
-      file:
+      ansible.builtin.file:
         path: /etc/containerd
         state: directory
-        mode: '0755'
 
-    - name: Generate default containerd config if missing
+    - name: Get defaults from containerd.
-      command: containerd config default
+      ansible.builtin.command: containerd config default
-      register: containerd_config
+      register: containerd_config_default
-      when: not lookup('file', '/etc/containerd/config.toml', errors='ignore')
-      changed_when: false
 
-    - name: Write default containerd config
+    - name: Create config file
-      copy:
+      ansible.builtin.copy:
-        content: "{{ containerd_config.stdout }}"
+        content: "{{ containerd_config_default.stdout }}"
         dest: /etc/containerd/config.toml
-      when: containerd_config is defined
 
-    - name: Set SystemdCgroup = true in containerd config
+    - name: Set SystemdCgroup to true
-      replace:
+      ansible.builtin.replace:
         path: /etc/containerd/config.toml
-        regexp: '^(\s*SystemdCgroup\s*=\s*)false'
+        regexp: '^(\s*)SystemdCgroup\s*=\s*false'
-        replace: '\1true'
+        replace: '\1SystemdCgroup = true'
 
     - name: Restart containerd
-      systemd:
+      ansible.builtin.service:
         name: containerd
         state: restarted
-        enabled: yes
+        enabled: true
-
+  
 ## Importantissimo per la gestione interna della network
 
     - name: Enable IPv4 forwarding at runtime
-      sysctl:
+      ansible.posix.sysctl:
         name: net.ipv4.ip_forward
         value: '1'
-        state: present
+        reload: true
-        reload: yes
         sysctl_set: yes
 
 ## Installa kubectl, kubeadm e kubelet dal repo ufficiale kubernetes
 
-    - name: Create /etc/apt/keyrings directory
+    - name: Add Kubernetes signing key
-      file:
+      ansible.builtin.apt_key:
-        path: /etc/apt/keyrings
+        url: https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key
-        state: directory
+        state: present
-        mode: '0755'
 
-    - name: Download and save the Kubernetes APT key
+    - name: Add Kubernetes repository
-      ansible.builtin.shell: |
+      ansible.builtin.apt_repository:
-        curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+        repo: deb [arch=amd64] https://pkgs.k8s.io/core:/stable:/v1.33/deb/ /
-      args:
+        state: present
-        creates: /etc/apt/keyrings/kubernetes-apt-keyring.gpg
-
-    - name: Add Kubernetes APT repository
-      copy:
-        dest: /etc/apt/sources.list.d/kubernetes.list
-        content: |
-          deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.33/deb/ /
-
-    - name: Update apt cache after adding Kubernetes repo
-      apt:
-        update_cache: yes
 
     - name: Install Kubernetes components
-      apt:
+      ansible.builtin.apt:
         name:
           - kubelet
           - kubeadm
           - kubectl
         state: present
+        update_cache: true
 
 ## Ferma i pacchetti ad una specifica versione
 
     - name: Hold Kubernetes packages
-      ansible.builtin.shell: apt-mark hold kubelet kubeadm kubectl
+      ansible.builtin.dpkg_selections:
-
+        name: "{{ item }}"
-    - name: Enable and start containerd
+        selection: hold
-      systemd:
+      loop:
-        name: containerd
+        - kubelet
-        enabled: true
+        - kubeadm
-        state: started
+        - kubectl
 
 ## Abilita il servizio di kubelet
 

ansible/longhorn-deps.yaml

@@ -0,0 +1,46 @@
+---
+- name: Setup Longhorn Requirements
+  hosts: all
+  become: true
+  tasks:
+    - name: Install required packages
+      ansible.builtin.apt:
+        name:
+          - open-iscsi
+          - nfs-common
+          - cryptsetup
+          - dmsetup
+        state: present
+        update_cache: yes
+
+    - name: Ensure required kernel modules are loaded
+      community.general.modprobe:
+        name: "{{ item }}"
+        state: present
+      loop:
+        - iscsi_tcp
+        - dm_crypt
+
+    - name: Ensure required modules load on boot
+      ansible.builtin.copy:
+        content: "{{ item.name }}"
+        dest: "/etc/modules-load.d/{{ item.name }}.conf"
+        owner: root
+        group: root
+        mode: '0644'
+      loop:
+        - { name: iscsi_tcp }
+        - { name: dm_crypt }
+
+    - name: Disable and stop multipathd service
+      ansible.builtin.systemd_service:
+        name: multipathd
+        state: stopped
+        enabled: false
+
+    - name: Disable multipathd socket (if exists)
+      ansible.builtin.systemd_service:
+        name: multipathd.socket
+        enabled: false
+        state: stopped
+      ignore_errors: true

ansible/longhorn-reqs.yaml

@@ -1,52 +0,0 @@
----
-- name: Setup Longhorn Requirements
-  hosts: all
-  become: true
-  tasks:
-
-    - name: Install required packages
-      apt:
-        name:
-          - open-iscsi
-          - nfs-common
-          - cryptsetup
-          - dmsetup
-        state: present
-        update_cache: yes
-
-    - name: Ensure iscsi_tcp kernel module is loaded
-      modprobe:
-        name: iscsi_tcp
-        state: present
-
-    - name: Ensure dm_crypt kernel module is loaded
-      modprobe:
-        name: dm_crypt
-        state: present
-
-    - name: Ensure iscsi_tcp module loads on boot
-      copy:
-        dest: /etc/modules-load.d/iscsi.conf
-        content: |
-          iscsi_tcp
-        owner: root
-        group: root
-        mode: '0644'
-
-    - name: Ensure dm_crypt module loads on boot
-      copy:
-        dest: /etc/modules-load.d/dm_crypt.conf
-        content: |
-          dm_crypt
-        owner: root
-        group: root
-        mode: '0644'
-
-    - name: Disable and stop multipathd service
-      systemd:
-        name: multipathd
-        enabled: false
-        state: stopped
-        masked: true
-        daemon_reload: yes
-      ignore_errors: true  # in case it's not installed

ansible/master-k8s.yaml

@@ -1,5 +0,0 @@
-# master-k8s.yaml
-- import_playbook: k8s-install-deps.yaml
-- import_playbook: k8s-init.yaml
-- import_playbook: install_cni.yaml
-- import_playbook: longhorn-reqs.yaml

helm-deploy.sh

@@ -1,36 +0,0 @@
-#!/bin/bash
-
-## Setup MetalLb repo
-helm repo add metallb https://metallb.github.io/metallb
-helm repo update
-helm install metallb metallb/metallb -n metallb-system --create-namespace
-
-echo "Waiting for all the pods to start..."
-
-kubectl wait --namespace metallb-system \
-  --for=condition=Ready pod \
-  --all \
-  --timeout=120s
-
-## Apply the load-balancer IPs
-kubectl apply -f manifests/metallb/metallb-config.yaml
-
-## Setup traefik repo
-helm repo add traefik https://traefik.github.io/charts
-helm repo update
-helm install traefik traefik/traefik -n traefik -f ./manifests/traefik/values.yaml --create-namespace
-
-## Setup MetalLb repo
-helm repo add longhorn https://charts.longhorn.io
-helm repo update
-helm install longhorn longhorn/longhorn -n longhorn-system --create-namespace
-
-echo "Waiting for all the pods to start..."
-
-kubectl wait --namespace longhorn-system \
-  --for=condition=Ready pod \
-  --all \
-  --timeout=120s
-
-## Apply ingress rule
-kubectl apply -f manifests/longhorn/longhorn-ingress.yaml

init-deploy.sh

@@ -1,25 +0,0 @@
-#!/bin/bash
-
-KUBE_USER="kevin"
-KUBE_CP="k8s-control-plane"
-KUBE_W1="k8s-worker1"
-KUBE_W2="k8s-worker2"
-
-ANSIBLE_DIR="ansible"
-
-## Prepare all of the nodes with k8s using the ansible playbooks I prepared
-
-ansible-playbook -i ./"$ANSIBLE_DIR"/inventory.ini ./"$ANSIBLE_DIR"/master-k8s.yaml
-
-## Fetch the configuration from the freshly installed cluster. BEWARE THAT ANY EXISTING CONFIG WILL BE OVERWRITTEN
-
-scp "$KUBE_USER@$KUBE_CP":"$HOME"/.kube/config "$HOME"/.kube/config
-
-## Now join the workers to the cluster
-
-JOIN_TOKEN=$(ssh "$KUBE_USER@$KUBE_CP" "kubeadm token create --print-join-command")
-
-for NODE in "$KUBE_W1" "$KUBE_W2"; do 
-    echo "Joining $NODE"
-    ssh "$KUBE_USER@$NODE" "sudo $JOIN_TOKEN"
-done

manifests/certmanager/issuer.yaml

@@ -0,0 +1,16 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: cloudflare-clusterissuer
+spec:
+  acme:
+    email: ${ACME_MAIL}
+    server: https://acme-v02.api.letsencrypt.org/directory
+    privateKeySecretRef:
+      name: cloudflare-clusterissuer-key
+    solvers:
+    - dns01:
+        cloudflare:
+          apiTokenSecretRef:
+            name: cloudflare-api-token-secret
+            key: api-token

manifests/certmanager/values.yaml

@@ -0,0 +1,5 @@
+crds:
+  enabled: true
+extraArgs:
+  - --dns01-recursive-nameservers-only
+  - --dns01-recursive-nameservers=1.1.1.1:53,1.0.0.1:53

manifests/longhorn/certificate.yaml

@@ -0,0 +1,13 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: longhorn-ssl-certificate
+  namespace: longhorn-system
+spec:
+  # Secret names are always required.
+  secretName: longhorn-ssl-certificate
+  issuerRef:
+    name: cloudflare-clusterissuer
+    kind: ClusterIssuer
+  dnsNames:
+    - ${LONGHORN_DNS_NAME}

manifests/longhorn/ingress.yaml

@@ -6,8 +6,12 @@ metadata:
   annotations:
     traefik.ingress.kubernetes.io/router.entrypoints: websecure
 spec:
+  tls:
+    - hosts:
+      - ${LONGHORN_DNS_NAME}
+      secretName: longhorn-ssl-certificate
   rules:
-    - host: longhorn.nixit.it
+    - host: ${LONGHORN_DNS_NAME}
       http:
         paths:
         - path: /

manifests/metallb/metallb-config.yaml

@@ -5,7 +5,7 @@ metadata:
   namespace: metallb-system
 spec:
   addresses:
-    - 10.50.3.30-10.50.3.40
+    - ${IP_POOL_RANGE}
 
 ---
 apiVersion: metallb.io/v1beta1

manifests/traefik/values.yaml

@@ -1,8 +1,3 @@
-service:
-  spec:
-    externalTrafficPolicy: Local
-    loadBalancerIP: 10.50.3.30
-
 ports:
   web:
     redirections:

redbutton.sh

@@ -1,4 +1,117 @@
 #!/bin/bash
 
-./init-deploy.sh
+source .env
-./helm-deploy.sh
+
+ALL_NODES=("$KUBE_CP" "${KUBE_WORKERS[@]}")
+
+## Prepare all of the nodes with k8s using the ansible playbooks I prepared
+
+ansible-playbook ./"$ANSIBLE_DIR"/k8s-install-deps.yaml \
+  -i "$(IFS=, ; echo "${ALL_NODES[*]}",)" \
+  -u "$KUBE_USER" \
+  --private-key "$PRIVATE_KEY_PATH"
+
+ansible-playbook ./"$ANSIBLE_DIR"/longhorn-deps.yaml \
+  -i "$(IFS=, ; echo "${KUBE_WORKERS[*]}",)" \
+  -u "$KUBE_USER" \
+  --private-key "$PRIVATE_KEY_PATH"
+
+## Bootstrap the cluster
+
+ssh "$KUBE_USER@$KUBE_CP" \
+  "sudo kubeadm init \
+  --pod-network-cidr=$POD_NET_CIDR \
+  --apiserver-advertise-address=$API_ADDR \
+  --cri-socket unix:///run/containerd/containerd.sock"
+
+ssh "$KUBE_USER@$KUBE_CP" \
+  "sudo cp /etc/kubernetes/admin.conf /tmp/config && sudo chown $KUBE_USER:$KUBE_USER /tmp/config"
+
+## Fetch the configuration from the freshly installed cluster. BEWARE THAT ANY EXISTING CONFIG WILL BE OVERWRITTEN
+
+scp "$KUBE_USER@$KUBE_CP":/tmp/config "$HOME"/.kube/config
+
+## Install the CNI
+
+kubectl apply -f \
+  "https://raw.githubusercontent.com/projectcalico/calico/$CNI_VER/manifests/calico.yaml"
+
+## Now join the workers to the cluster
+
+JOIN_TOKEN=$(ssh "$KUBE_USER@$KUBE_CP" \
+  "sudo kubeadm token create --print-join-command")
+
+for NODE in "${KUBE_WORKERS[@]}"; do 
+    echo "Joining $NODE"
+    ssh "$KUBE_USER@$NODE" "sudo $JOIN_TOKEN"
+done
+
+### NOW APPLYING HELMS ###
+
+## Setup all the needed repos
+helm repo add metallb https://metallb.github.io/metallb
+helm repo add traefik https://traefik.github.io/charts
+helm repo add jetstack https://charts.jetstack.io
+helm repo add longhorn https://charts.longhorn.io
+helm repo update
+
+## Let's install metallb!
+
+helm install \
+  metallb metallb/metallb \
+  -n metallb-system \
+  --create-namespace
+
+echo "Waiting for all the pods to start..."
+
+kubectl wait --namespace metallb-system \
+  --for=condition=Ready pod \
+  --all \
+  --timeout=200s
+
+## Apply the load-balancer IPs range
+
+envsubst < ./manifests/metallb/metallb-config.yaml | kubectl apply -f -
+
+## Let's install traefik!
+
+helm install \
+  traefik traefik/traefik \
+  -n traefik \
+  -f ./manifests/traefik/values.yaml \
+  --set service.spec.loadBalancerIP="$LOAD_BALANCER_IP" \
+  --create-namespace
+
+## Let's install Cert-Manager!
+
+helm install \
+  cert-manager jetstack/cert-manager \
+  -n cert-manager \
+  -f ./manifests/certmanager/values.yaml \
+  --create-namespace
+
+## Set up the cloudflare API token secret
+
+kubectl create secret generic cloudflare-api-token-secret \
+  --from-literal=api-token="$CF_API" \
+  -n=cert-manager
+
+## Apply the cloudflare Issuer
+
+envsubst < ./manifests/certmanager/issuer.yaml | kubectl apply -f -
+
+## Let's install longhorn!
+
+helm install longhorn longhorn/longhorn -n longhorn-system --create-namespace
+
+echo "Waiting for all the pods to start..."
+
+kubectl wait --namespace longhorn-system \
+  --for=condition=Ready pod \
+  --all \
+  --timeout=120s
+
+## Apply ingress rule and certificate
+
+envsubst < ./manifests/longhorn/certificate.yaml | kubectl apply -f -
+envsubst < ./manifests/longhorn/ingress.yaml | kubectl apply -f -