nomad csi volume plugin

roles/nomad/tasks/csi_plugins.yml

@@ -0,0 +1,22 @@
+ - name: Deploy CSI plugin
+   community.general.nomad_job:
+     host: "nomad.service.consul"
+     state: present
+     content: "{{ lookup('ansible.builtin.template', item + '.nomad.j2') }}"
+     use_ssl: false
+   register: nomad_job_spawn
+   retries: 10
+   delay: 5
+   until: nomad_job_spawn.failed == false
+
+ - name: Check the job state is healthy
+   ansible.builtin.uri:
+     url: "http://nomad.service.consul:4646/v1/job/plugin-{{ item }}"
+     method: GET
+     remote_src: yes
+   register: job_status
+   until: job_status | json_query('json.Status') == 'running'
+
+ - name: debug
+   debug:
+     msg: "{{ nomad_job_spawn }}"

roles/nomad/tasks/csi_volumes.yml

@@ -0,0 +1,39 @@
+---
+
+- name: Check if volume has already been created and registered
+  ansible.builtin.uri:
+    url: "http://nomad.service.consul:4646/v1/volume/csi/{{ item.id }}"
+    method: GET
+    remote_src: yes
+  register: volume_exists
+  ignore_errors: true
+
+- name: Check for state of CSI Plugins to prevent race
+  block:
+  - name: Check controller plugin
+    ansible.builtin.uri:
+      url: "http://nomad.service.consul:4646/v1/job/plugin-nfs-controller"
+      method: GET
+      remote_src: yes
+    register: controller_status
+    until: controller_status | json_query('json.Status') == 'running'
+  - name: Check node plugin
+    ansible.builtin.uri:
+      url: "http://nomad.service.consul:4646/v1/job/plugin-nfs-node"
+      method: GET
+      remote_src: yes
+    register: node_status
+    until: node_status | json_query('json.Status') == 'running'
+
+  - name: Create CSI volume with Nomad API
+    ansible.builtin.uri:
+      url: http://nomad.service.consul:4646/v1/volume/csi/{{ item.id }}/create
+      method: PUT
+      body_format: json
+      body: "{{ lookup('template', 'csi-volumes.json.j2') }}"
+      remote_src: yes
+    register: csi_volume
+    until: csi_volume.status == 200
+    retries: 5
+    delay: 10
+  when: volume_exists.status == 404

roles/nomad/tasks/main.yml

@@ -31,14 +31,17 @@
   loop: "{{ nomad_namespaces  }}"
   run_once: true
 
-#- name: Setup csi plugins
-#  ansible.builtin.include_tasks: "csi_plugins.yml"
-#  loop:
-#     - azure_csi_controller
-#     - azure_csi_node
-#  when: nomad_csi_volumes is defined
-#  run_once: true
-#
+- name: Setup csi plugins
+  ansible.builtin.include_tasks: "csi_plugins.yml"
+  loop:
+     - nfs-controller
+     - nfs-plugin-node
+  when: nomad_csi_volumes is defined
+  run_once: true
+
+# We're playing with nfs csi plugin and cant create volumes automatically
+# because every nomad volume maps to a nfs share, and those needs to be created
+# in another server (FIXME)
 # - name: Create csi volumes
 #   ansible.builtin.include_tasks: "csi_volumes.yml"
 #   loop: "{{ nomad_csi_volumes }}"

roles/nomad/tasks/testjob-with-volumes.nomad.hcl

@@ -0,0 +1,24 @@
+job "test" {
+  datacenters = ["dc1"]
+  type = "service"
+  group "server" {
+    count = 2
+    volume "test" {
+      type = "csi"
+      source = "test"
+      access_mode = "multi-node-multi-writer"
+      attachment_mode = "file-system"
+    }
+    task "server" {
+      driver = "docker"
+      config {
+        image = "alpine"
+        args  = ["sleep", "3600"]
+      }
+      volume_mount {
+        volume = "test"
+        destination = "/mnt/test"
+      }
+    }
+  }
+}

roles/nomad/templates/csi-volumes.json.j2

@@ -0,0 +1,18 @@
+type = "csi"
+id = "{{ item.id }}"
+name = "{{ item.name }}"
+plugin_id = "nfsofficial"
+external_id = "{{ item.id }}"
+capability {
+	access_mode = "multi-node-multi-writer"
+	attachment_mode = "file-system"
+}
+context {
+  server = "192.168.1.2"
+  share = "/srv/nfs-exports/proxmox"
+  mountPermissions = "0"
+}
+mount_options {
+  fs_type = "nfs"
+  mount_flags = [ "timeo=30", "intr", "vers=3", "_netdev" , "nolock" ]
+}

roles/nomad/templates/nfs-controller.nomad.j2

@@ -0,0 +1,27 @@
+job "plugin-nfs-controller" {
+  datacenters = ["{{ nomad_datacenter }}"]
+  group "controller" {
+    task "plugin" {
+      driver = "docker"
+      config {
+        image = "registry.k8s.io/sig-storage/nfsplugin:v4.1.0"
+        args = [
+          "--v=5",
+          "--nodeid=${attr.unique.hostname}",
+          "--endpoint=unix:///csi/csi.sock",
+          "--drivername=nfs.csi.k8s.io"
+        ]
+      }
+      csi_plugin {
+        id        = "nfsofficial"
+        type      = "controller"
+        mount_dir = "/csi"
+      }
+      resources {
+        memory = 32
+        cpu    = 100
+      }
+    }
+  }
+}
+

roles/nomad/templates/nfs-plugin-node.nomad.j2

@@ -0,0 +1,31 @@
+job "plugin-nfs-node" {
+  datacenters = ["{{ nomad_datacenter }}"]
+  # you can run node plugins as service jobs as well, but this ensures
+  # that all nodes in the DC have a copy.
+  type = "system"
+  group "nodes" {
+    task "plugin" {
+      driver = "docker"
+      config {
+        image = "registry.k8s.io/sig-storage/nfsplugin:v4.1.0"
+        args = [
+          "--v=5",
+          "--nodeid=${attr.unique.hostname}",
+          "--endpoint=unix:///csi/csi.sock",
+          "--drivername=nfs.csi.k8s.io"
+        ]
+        # node plugins must run as privileged jobs because they
+        # mount disks to the host
+        privileged = true
+      }
+      csi_plugin {
+        id        = "nfsofficial"
+        type      = "node"
+        mount_dir = "/csi"
+      }
+      resources {
+        memory = 10
+      }
+    }
+  }
+}

roles/nomad/templates/nfs-volume.hcl.j2

@@ -0,0 +1,18 @@
+type = "csi"
+id = "test"
+name = "test"
+plugin_id = "nfsofficial"
+external_id = "testid"
+capability {
+	access_mode = "multi-node-multi-writer"
+	attachment_mode = "file-system"
+}
+context {
+  server = "192.168.1.2"
+  share = "/srv/nfs-exports/nomad"
+  mountPermissions = "0"
+}
+mount_options {
+  fs_type = "nfs"
+  mount_flags = [ "timeo=30", "intr", "vers=3", "_netdev" , "nolock" ]
+}