Merge pull request #27 from ricsanfre/feature/backup

Adding cluster backup capability

.gitignore

@@ -1,2 +1,3 @@
 ansible/roles/ricsanfre.*
 ansible_collections
+certificates

README.md

@@ -33,6 +33,7 @@ As part of the project the goal is to deploy on the Kuberenets cluster basic ser
     - [K3S Distributed Storage](documentation/longhorn.md). Installing LongHorn as cluster distributed storage solution for providing Persistent Volumes to pods.
     - [K3S centralized logging monitoring](documentation/logging.md). Installing a centralized log monitoring tool based on EFK stack. Real-time processing of Kuberentes pods and services and homelab servers logs.
     - [K3S centralized monitoring](documentation/monitoring.md). Installing Kube Prometheus Stack for monitoring Kuberentes cluster
+5) [Cluster backup and restore](documentation/backup.md). Deployment of a backup server (Minio S3 Object Store) and backup policies implementation at 3 levels: 1) OS filesystem level, using Restic, 2) Kubernetes configuration, using Velero, 3) POD's Persistent Volumes, using Longhorn backup/snapshots and Velero-restic.    
 
 ## Automatic deployment instructions using Ansible
 
@@ -86,6 +87,14 @@ As part of the project the goal is to deploy on the Kuberenets cluster basic ser
      ```
      ansible-playbook setup_picluster.yml --tags "node"
      ```
+  - Configure backup server (S3) (`node1`) and configuring OS backup with restic in all nodes (`node1-node4` and `gateway`)
+
+     Run the playbook:
+
+     ```
+     ansible-playbook backup_configuration.yml
+     ```
+
   - Install K3S cluster
 
      Run the playbook:
@@ -94,7 +103,7 @@ As part of the project the goal is to deploy on the Kuberenets cluster basic ser
      ansible-playbook k3s_install.yml
      ```
 
-  - Deploy and configure basic services (metallb, traefik, certmanager, longhorn, EFK and Prometheus )
+  - Deploy and configure basic services (metallb, traefik, certmanager, longhorn, EFK, Prometheus, Velero )
 
      Run the playbook:
 
@@ -116,6 +125,7 @@ As part of the project the goal is to deploy on the Kuberenets cluster basic ser
      | `longhorn` | Longhorn |
      | `logging` | EFK Stack |
      | `monitoring` | Prometheus Stack |
+     | `backup` | Velero |
 
 
 ### Resetting K3s

ansible/backup_configuration.yml

@@ -0,0 +1,55 @@
+---
+
+- name: Configure Backup Server - S3 Storage
+  hosts: node1
+  gather_facts: true
+  tags: [backup]
+  vars:
+    ansible_become: true
+    server_hostname: "{{ minio_hostname }}"
+    ssl_key_size: 4096
+    ssl_certificate_provider: selfsigned
+    key_type: RSA
+    country_name: ES
+    email_address: admin@ricsanfre.com
+    organization_name: Ricsanfre
+
+  pre_tasks:
+    - name: Generate custom CA
+      include_tasks: tasks/generate_custom_ca.yml
+      args:
+        apply:
+          delegate_to: localhost
+          become: false
+    - name: Generate customCA-signed SSL certificates for minio
+      include_tasks: tasks/generate_ca_signed_cert.yml
+      args:
+        apply:
+          delegate_to: localhost
+          become: false
+    - name: Load tls key and cert
+      set_fact:
+        minio_key: "{{ lookup('file','certificates/' + server_hostname + '.key') }}"
+        minio_cert: "{{ lookup('file','certificates/' + server_hostname + '.pem') }}"
+
+  tasks:
+    - name: Include S3 configuration variables
+      include_vars:
+        file: vars/backup/s3_minio.yml
+    - name: Configure Minio S3 server
+      include_role:
+        name: ricsanfre.minio
+
+- name: Configure Pi-cluster nodes backup
+  hosts: raspberrypi
+  gather_facts: true
+  tags: [backup]
+  vars:
+    ansible_become: true
+  pre_tasks:
+    - name: Load CA certificate for restic
+      set_fact:
+        restic_ca_cert: "{{ lookup('file','certificates/CA.pem') }}"
+  roles:
+    - role: ricsanfre.backup
+      tags: [backup]

ansible/group_vars/all.yml

@@ -5,3 +5,39 @@ ansible_user: ansible
 # Cluster Lab Architecture
 # Whether to use centralized SAN architecture or not
 centralized_san: false
+
+#######################
+# DNS configuration
+#######################
+# DNS server
+dns_server: 10.0.0.1
+dns_domain: picluster.ricsanfre.com
+
+#######################
+# backup configuration
+#######################
+
+# Minio S3 Server
+minio_hostname: s3.picluster.ricsanfre.com
+minio_url: "https://{{ minio_hostname }}:9091"
+minio_site_region: "eu-west-1"
+
+
+restic_repository: "s3:{{ minio_url }}/restic"
+restic_aws_access_key_id: restic
+restic_aws_secret_access_key: supers1cret0
+restic_use_ca_cert: true
+# Deactivate clean service. Only enabled in one node
+restic_clean_service: false
+restic_backups_dirs:
+  - path: '/etc'
+  - path: '/root'
+    exclude:
+      - pattern: '.cache'
+  - path: '/home/ansible'
+    exclude:
+      - pattern: '.cache'
+      - pattern: '.ansible'
+  - path: '/home/oss'
+    exclude:
+      - pattern: '.cache'

ansible/group_vars/k3s_cluster.yml

@@ -27,6 +27,7 @@ k3s_longhorn_namespace: longhorn-system
 k3s_certmanager_namespace: certmanager-system
 k3s_logging_namespace: k3s-logging
 k3s_monitoring_namespace: k3s-monitoring
+k3s_velero_namespace: velero-system
 
 # DNS service end-points
 
@@ -45,3 +46,14 @@ k3s_external_ip_range: "10.0.0.100-10.0.0.200"
 # HTTP Basic auth credentials
 traefik_basic_auth_user: admin
 traefik_basic_auth_passwd: s1cret0
+
+# Velero
+minio_velero_user: velero
+minio_velero_key: supers1cret0
+minio_velero_bucket: k3s-velero
+
+# Enabling longhorn backup
+longhorn_s3_backup: true
+minio_longhorn_user: longhorn
+minio_longhorn_key: supers1cret0
+minio_longhorn_bucket: k3s-longhorn

ansible/host_vars/gateway.yml

@@ -25,6 +25,10 @@ dnsmasq_additional_dns_hosts:
     desc: "DNS Server"
     hostname: dns
     ip: 10.0.0.1
+  s3_server:
+    desc: "S3 Server"
+    hostname: s3
+    ip: 10.0.0.11
 
 ####################
 # ntp role variables
@@ -94,7 +98,14 @@ nft_forward_host_rules:
     - iifname $wan_interface oifname $lan_interface ip daddr $lan_network tcp dport ssh ct state new accept
   230 http from wan:
     - iifname $wan_interface oifname $lan_interface ip daddr $lan_network tcp dport {http, https} ct state new accept
+  240 s3 from wan:
+    - iifname $wan_interface oifname $lan_interface ip daddr 10.0.0.11 tcp dport {9091, 9092} ct state new accept
 # NAT Post-routing
 nft_nat_host_postrouting_rules:
   005 masquerade lan to wan:
     - ip saddr $lan_network oifname $wan_interface masquerade
+
+############################
+# restic backup role variables
+############################
+restic_clean_service: true

ansible/k3s_deploy.yml

@@ -41,6 +41,8 @@
       tags: ['monitoring']
     - role: logging/k3s
       tags: ['logging']
+    - role: backup/velero
+      tags: ['backup']
 
 - name: Deploy fluentbit on control nodes (gateway and pimaster)
   hosts: control

ansible/requirements.yml

@@ -18,6 +18,10 @@ roles:
     version: v1.0.0
   - name: ricsanfre.fluentbit
     version: v1.0.3
+  - name: ricsanfre.minio
+    version: v1.0.7
+  - name: ricsanfre.backup
+    version: v1.0.2
 collections:
   - name: kubernetes.core
     version: 2.1.1

ansible/roles/backup/velero/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+velero_version: v1.7.1
+velero_arch: arm64

ansible/roles/backup/velero/tasks/configure_velero_cli.yml

@@ -0,0 +1,30 @@
+---
+- name: Get CLI configured namespace
+  command:
+    cmd: "velero client config get namespace"
+  register: get_velero_namespace
+  changed_when: false
+  ignore_errors: true
+
+- name: Configure velero CLI namespace
+  command:
+    cmd: "velero client config set namespace={{ k3s_velero_namespace }}"
+  when:
+    - get_velero_namespace.rc==0
+    - '"namespace: <NOT SET>" in get_velero_namespace.stdout or "namespace: " + k3s_velero_namespace not in get_velero_namespace.stdout'
+  changed_when: true
+
+- name: Get CLI configured colored
+  command:
+    cmd: "velero client config get colored"
+  register: get_velero_colored
+  changed_when: false
+  ignore_errors: true
+
+- name: Configure velero CLI colored output
+  command:
+    cmd: "velero client config set colored=true"
+  when:
+    - get_velero_colored.rc==0
+    - '"colored: <NOT SET>" in get_velero_colored.stdout or "colored: true" not in get_velero_colored.stdout'
+  changed_when: true

ansible/roles/backup/velero/tasks/install_velero_cli.yml

@@ -0,0 +1,20 @@
+---
+
+- name: Download Velero CLI
+  get_url:
+    url: https://github.com/vmware-tanzu/velero/releases/download/{{ velero_version }}/velero-{{ velero_version }}-linux-{{ velero_arch }}.tar.gz
+    dest: /tmp/velero-{{ velero_version }}-linux-{{ velero_arch }}.tar.gz
+    mode: '0766'
+
+- name: Extract archives
+  unarchive:
+    src: /tmp/velero-{{ velero_version }}-linux-{{ velero_arch }}.tar.gz
+    dest: /tmp
+    remote_src: true
+
+- name: Copy binary to /usr/local/bin
+  copy:
+    src: /tmp/velero-{{ velero_version }}-linux-{{ velero_arch }}/velero
+    dest: /usr/local/bin/velero
+    mode: '0755'
+    remote_src: true

ansible/roles/backup/velero/tasks/main.yml

@@ -0,0 +1,79 @@
+---
+
+- name: Install velero client
+  include_tasks: install_velero_cli.yml
+  args:
+    apply:
+      become: true
+
+- name: Create velero namespace.
+  kubernetes.core.k8s:
+    name: "{{ k3s_velero_namespace }}"
+    api_version: v1
+    kind: Namespace
+    state: present
+
+
+- name: Configure velero CLI
+  include_tasks: configure_velero_cli.yml
+
+- name: Add vmware-tanzu chart repo.
+  kubernetes.core.helm_repository:
+    name: vmware-tanzu
+    repo_url: "https://vmware-tanzu.github.io/helm-charts"
+
+- name: Deploy Velero with Minio storage provider
+  kubernetes.core.helm:
+    name: velero
+    chart_ref: vmware-tanzu/velero
+    update_repo_cache: true
+    release_namespace: "{{ k3s_velero_namespace }}"
+    state: present
+    release_values:
+      # AWS backend plugin configuration
+      initContainers:
+        - name: velero-plugin-for-aws
+          image: velero/velero-plugin-for-aws:v1.3.0
+          imagePullPolicy: IfNotPresent
+          volumeMounts:
+            - mountPath: /target
+              name: plugins
+      # Upgrading CRDs is causing issues
+      upgradeCRDs: false
+      # Use a kubectl image supporting ARM64
+      # bitnami default is not suppporting it
+      # kubectl:
+      #   image:
+      #     repository: rancher/kubectl
+      #     tag: v1.21.5
+      # Disable volume snapshots. Longhorn deals with them
+      snapshotsEnabled: false
+      # Deploy restic
+      deployRestic: true
+      # Minio storage configuration
+      configuration:
+        # Cloud provider being used
+        provider: aws
+        backupStorageLocation:
+          provider: aws
+          bucket: "{{ minio_velero_bucket }}"
+          caCert: "{{ lookup('file','certificates/CA.pem') | b64encode | replace('\n', '') }}"
+          config:
+            region: "{{ minio_site_region }}"
+            s3ForcePathStyle: true
+            s3Url: "{{ minio_url }}"
+            insecureSkipTLSVerify: true
+      credentials:
+        secretContents:
+          cloud: |
+            [default]
+            aws_access_key_id: "{{ minio_velero_user }}"
+            aws_secret_access_key: "{{ minio_velero_key }}"
+
+
+- name: Create Full backup Schedule policy
+  kubernetes.core.k8s:
+    definition: "{{ lookup('template', 'templates/' + item ) }}"
+    state: present
+  with_items:
+    - velero_full_schedule.yml.j2

ansible/roles/backup/velero/templates/velero_full_schedule.yml.j2

@@ -0,0 +1,20 @@
+---
+apiVersion: velero.io/v1
+kind: Schedule
+metadata:
+  name: full
+  namespace: velero-system
+spec:
+  schedule: 0 4 * * *
+  template:
+    hooks: {}
+    includedNamespaces:
+    - '*'
+    included_resources:
+    - '*'
+    includeClusterResources: true
+    metadata:
+      labels:
+        type: 'full'
+        schedule: 'daily'
+    ttl: 720h0m0s

ansible/roles/backup/velero/tests/cleaning_testing.yml

@@ -0,0 +1,11 @@
+---
+- name: Cleaning velero testing pod.
+  hosts: k3s_master
+
+  tasks:
+    - name: Cleaning testing
+      kubernetes.core.k8s:
+        definition: "{{ lookup('file', 'files/' + item ) }}"
+        state: absent
+      with_items:
+        - nginx_test_application.yml