Practica final
This commit is contained in:
Guillem Hernandez Sola
106
boxes/ubuntu/README.md
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106
boxes/ubuntu/README.md
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# Ubuntu Vagrant + k3s — Guia ràpida
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Aquest directori inclou fitxers i scripts per muntar un petit entorn de desenvolupament basat en Ubuntu amb k3s utilitzant Vagrant.
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Contingut principal
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- `Vagrantfile` — Fitxer de Vagrant per crear les VM (controlador i agents).
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- `libvirtVagrantfile` — Variante per a provider `libvirt` (si s'utilitza).
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- `k3s_control.sh` — Script d'inicialització/gestió per al node controlador k3s.
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- `k3s_worker.sh` — Script per unir nodes worker al clúster.
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- `.vagrant/` — Estat local de Vagrant (no versionar).
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- `shared/` — Fitxer compartit amb el host:
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- `k3s.yaml` — kubeconfig generat pel clúster dins les VM.
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- `token` — Token per unir workers (mantenir privat).
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Prerequisits
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- `Vagrant` instal·lat i un provider configurat (VirtualBox, libvirt, etc.).
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- Accés suficient per crear màquines virtuals i configurar xarxes.
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Arrencar l'entorn
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1. Obre un terminal i entra a la carpeta `ubuntu`:
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```bash
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cd ubuntu
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```
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2. Inicia les màquines (totes):
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```bash
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vagrant up
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```
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3. Si utilitzes `libvirt` i tens el `libvirtVagrantfile`, inicia amb el provider corresponent:
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```bash
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vagrant up --provider=libvirt
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```
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Ús dels scripts
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- Per preparar o controlar k3s al node controlador, pots executar `k3s_control.sh` (pot requerir `vagrant ssh server` o execució dins la VM):
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```bash
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vagrant ssh server -- "sudo /vagrant/k3s_control.sh"
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```
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- Per unir un worker manualment utilitzant el token compartit:
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```bash
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vagrant ssh agent1 -- "sudo /vagrant/k3s_worker.sh $(cat /vagrant/token)"
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```
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Accedir al kubeconfig
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- El `kubeconfig` generat pel clúster es troba a `shared/k3s.yaml`. Per utilitzar-lo localment:
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```bash
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export KUBECONFIG=$PWD/shared/k3s.yaml
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kubectl get nodes
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```
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o copiar-lo al teu `~/.kube/config`:
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```bash
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cp shared/k3s.yaml ~/.kube/config
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```
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Token i seguretat
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- `shared/token` conté el token per unir nodes; tracta'l com a secret i no el versionis.
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Aturar i netejar
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- Aturar les màquines:
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```bash
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vagrant halt
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```
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- Destruir-les (alliberar recursos):
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```bash
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vagrant destroy -f
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```
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Consells i resolució d'errors comuns
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- Si alguna màquina no arrenca, comprova el provider (VirtualBox/libvirt) i l'espai disponible.
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- Si els nodes surten `NotReady`, fes `vagrant ssh server` i comprova l'estat de k3s:
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```bash
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sudo systemctl status k3s
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sudo journalctl -u k3s -n 200
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```
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- Revisa permisos i SELinux/ AppArmor si tens problemes de muntatge de carpetes compartides.
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# Suport
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Aquest tutorial és publicat al domini públic per [Agile611](http://www.agile611.com/) sota la llicència Creative Commons Attribution-NonCommercial 4.0 International.
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[](https://creativecommons.org/licenses/by-nc/4.0/)
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Aquest fitxer README va ser escrit originalment per [Guillem Hernández Sola](https://www.linkedin.com/in/guillemhs/) i també és publicat al domini públic.
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Si us plau, contacta amb Agile611 per a més detalls.
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* [Agile611](http://www.agile611.com/)
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* Laureà Miró 309
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* 08950 Esplugues de Llobregat (Barcelona)
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[](http://www.agile611.com/)
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53
boxes/ubuntu/Vagrantfile
vendored
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boxes/ubuntu/Vagrantfile
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server_ip = "192.168.33.10"
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agents = { "agent1" => "192.168.33.11",
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"agent2" => "192.168.33.12",
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"agent3" => "192.168.33.13" }
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server_script = <<-SHELL
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export INSTALL_K3S_EXEC="--bind-address=#{server_ip} --node-external-ip=#{server_ip} --flannel-iface=eth1"
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curl -sfL https://get.k3s.io | sh -
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echo "Sleeping for 10 seconds to wait for k3s to start"
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sleep 10
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sudo chown vagrant:vagrant /etc/rancher/k3s/k3s.yaml
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export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
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cp /var/lib/rancher/k3s/server/token /vagrant_shared
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cp /etc/rancher/k3s/k3s.yaml /vagrant_shared
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sleep 10
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kubectl taint nodes server node-role.kubernetes.io/master=true:NoSchedule
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SHELL
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agent_script = <<-SHELL
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export K3S_TOKEN_FILE=/vagrant_shared/token
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export K3S_URL=https://#{server_ip}:6443
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export INSTALL_K3S_EXEC="--flannel-iface=eth1"
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curl -sfL https://get.k3s.io | sh -
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SHELL
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Vagrant.configure("2") do |config|
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config.vm.box = "bento/ubuntu-24.04"
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config.vm.define "server", primary: true do |server|
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server.vm.network "private_network", ip: server_ip
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server.vm.synced_folder "./shared", "/vagrant_shared"
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server.vm.hostname = "server"
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server.vm.provider "virtualbox" do |vb|
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vb.memory = "2048"
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vb.cpus = "2"
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end
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server.vm.provision "shell", inline: server_script
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end
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agents.each do |agent_name, agent_ip|
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config.vm.define agent_name do |agent|
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agent.vm.network "private_network", ip: agent_ip
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agent.vm.synced_folder "./shared", "/vagrant_shared"
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agent.vm.hostname = agent_name
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agent.vm.provider "virtualbox" do |vb|
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vb.memory = "1024"
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vb.cpus = "1"
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end
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agent.vm.provision "shell", inline: agent_script
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end
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end
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end
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14
boxes/ubuntu/k3s_control.sh
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boxes/ubuntu/k3s_control.sh
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echo "🚀 Instal·lant K3s Server (Master)..."
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curl -sfL https://get.k3s.io | sh -s - --node-ip 10.0.3.15
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#curl -sfL https://get.k3s.io | sh -
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sudo chown vagrant:vagrant /etc/rancher/k3s/k3s.yaml
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export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
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kubectl version
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kubectl get nodes
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kubectl get pods -A
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curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
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sudo mv kustomize /usr/local/bin
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echo "✅ Master llest!"
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30
boxes/ubuntu/k3s_worker.sh
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boxes/ubuntu/k3s_worker.sh
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# Aquest script s'ha de fer servir amb el node agent ja provisionat
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# Anem a buscar el node token al Master
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# sudo cat /var/lib/rancher/k3s/server/node-token
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# Això dóna un string com algun_string_random::server:segon_string_random
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# NOTA: Executar les següents comandes als nodes que voleu que siguin workers
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# K3S_TOKEN=algun_string_random::server:segon_string_random
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# Ex: K3S_TOKEN=K108085cf047fe22375b5c2ac96fec70afffd8a36fa66e8066f0218233e97c8ce6b::server:f3e19f5b6ed1c93e4c1bf0992bb5dc68
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# Quan ja tinguem els nodes preparats i penjats
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# Recordar que 10.0.3.15 és la IP del controlplane
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echo "🚀 Instal·lant K3s Agent (Worker) connectant a 10.0.3.15..."
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curl -sfL https://get.k3s.io | K3S_URL=https://10.0.3.15:6443 K3S_TOKEN=$K3S_TOKEN sh -
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echo "✅ Worker unit al clúster!"
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#Executar això al Controplane, per tenir-los amb role de worker
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#kubectl label node worker-node01 node-role.kubernetes.io/worker=worker
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#kubectl label node worker-node02 node-role.kubernetes.io/worker=worker
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#Desactivar que al node controlplane es puguin executar pods
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#kubectl taint nodes controlplane node-role.kubernetes.io/master=true:NoSchedule
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#Estabilitzar les IPS
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# Al Control Plane
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# curl -sfL https://get.k3s.io | sh -s - --node-ip 10.0.3.15 --flannel-iface eth1
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# Al Worker01
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# curl -sfL https://get.k3s.io | K3S_URL=https://10.0.3.15:6443 K3S_TOKEN=$K3S_TOKEN sh -s - --node-ip 10.0.3.16
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# Al Worker02
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# curl -sfL https://get.k3s.io | K3S_URL=https://10.0.3.15:6443 K3S_TOKEN=$K3S_TOKEN sh -s - --node-ip 10.0.3.17
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41
boxes/ubuntu/libvirtVagrantfile
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41
boxes/ubuntu/libvirtVagrantfile
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#Passo el Vagrantfile per utilitzar amb libvit:
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# -*- mode: ruby -*-
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# vi: set ft=ruby :
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# Configuració Global
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NUM_WORKER_NODES = 2
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IP_NW = "192.168.3."
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IP_MASTER = "192.168.3.10" # Fixem la IP del Master per referenciar-la als workers
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Vagrant.configure("2") do |config|
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config.vm.define "master" do |master|
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master.vm.box = "bento/ubuntu-24.04"
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master.vm.network "private_network", ip: "192.168.3.10"
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master.vm.hostname = "master"
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master.vm.synced_folder ".", "/home/vagrant/sync", type: "rsync"
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master.vm.provision :shell, path: "k3s_master.sh"
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master.vm.network :forwarded_port, guest: 6443, host: 6443
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master.vm.network :forwarded_port, guest: 80, host: 8080
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master.vm.provider :libvirt do |v|
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v.memory = 2048
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v.cpus = 2
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v.graphics_type = "spice"
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end
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end
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# --- Configuració dels WORKERS ---
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(1..NUM_WORKER_NODES).each do |i|
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config.vm.define "node0#{i}" do |node|
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node.vm.box = "bento/ubuntu-24.04"
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node.vm.hostname = "worker-node0#{i}"
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node.vm.network "private_network", ip: IP_NW + "#{10 + i}"
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node.vm.provider :libvirt do |v|
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v.memory = 1024
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v.cpus = 1
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v.graphics_type = "spice"
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end
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end
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end
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end
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0
boxes/ubuntu/shared/.gitkeep
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0
boxes/ubuntu/shared/.gitkeep
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18
boxes/ubuntu/shared/k3s.yaml
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18
boxes/ubuntu/shared/k3s.yaml
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apiVersion: v1
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clusters:
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- cluster:
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certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUJkakNDQVIyZ0F3SUJBZ0lCQURBS0JnZ3Foa2pPUFFRREFqQWpNU0V3SHdZRFZRUUREQmhyTTNNdGMyVnkKZG1WeUxXTmhRREUzTnpJeE1EVTBOekl3SGhjTk1qWXdNakkyTVRFek1URXlXaGNOTXpZd01qSTBNVEV6TVRFeQpXakFqTVNFd0h3WURWUVFEREJock0zTXRjMlZ5ZG1WeUxXTmhRREUzTnpJeE1EVTBOekl3V1RBVEJnY3Foa2pPClBRSUJCZ2dxaGtqT1BRTUJCd05DQUFUZzFBWGlGUldhbDBlZXJXWXhPMkpQNTdEUjNmTTZwSWZPdkZWaC9UOEUKNWJxU0dLaFIwZXNqQzlqaDd2eVBIOERESjUrQ254dUdCOE80elViRUtFd1BvMEl3UURBT0JnTlZIUThCQWY4RQpCQU1DQXFRd0R3WURWUjBUQVFIL0JBVXdBd0VCL3pBZEJnTlZIUTRFRmdRVW43dk9qUkhWcmVPQmZxeU9OTlJmCnBuaExRTk13Q2dZSUtvWkl6ajBFQXdJRFJ3QXdSQUlnRVE2TXM2eVkyWERaNGRaamZOVzRtbGR2ZmlwSFNUYjgKcWw0eUZScU9aa1VDSUFvdG1VdFgxTVZKWFBXb2JCd09pSnVDekdmUk1VUnhENmdaZ0pFeEc0YmkKLS0tLS1FTkQgQ0VSVElGSUNBVEUtLS0tLQo=
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server: https://192.168.33.10:6443
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name: default
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contexts:
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- context:
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cluster: default
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user: default
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name: default
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current-context: default
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kind: Config
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users:
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- name: default
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user:
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client-certificate-data: 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client-key-data: LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUdLUG5DNHVzVXVrems3NTlsU3J4YVJ5aUlWcEtObGc3T1Uvb09EamdnanNvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFcW1PcjM3Y1BLYnVHaktJMlRNVHQzZmdIc05zejhORFFnVDFUd2JaTURHaElFQnVLTnJNVwpEYitKa1F4QTAyS1p3VnFBVEt6eGlWSkU1WjFtcitPZXdnPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo=
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1
boxes/ubuntu/shared/token
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1
boxes/ubuntu/shared/token
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K10d10b891bb7bc3db04057b734136b0ab30176499b236381ae7e06b493211b1844::server:7030dca29bd903efdbb3e2f2876aacc0
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