Adding instructions to enable GCSFuse for storage objects.

source/Tech-tips/HPC-with-Slurm-on-GCP.rst

@@ -8,6 +8,35 @@ Accessing with CLI
 
 The newly created cluster has a dedicated login node. In the most secure configuration, no public IPs are assigned to any nodes. The firewall only allows ICMP and TCP port 22. Follow instructions in `Accessing GCP node from CLI <Accessing-GCP-node-from-CLI.html>`_ to access the Slurm cluster via SSH, SCP, rsync, etc.
 
+Enable GCSFuse
+--------------
+
+GCSFuse presents storage objects as files on shared directories. This allows you to access Petabytes of storage without pre-allocating anything. There is no downloading or uploading needed. You do not need to hard-code any keys or passwords, either.
+
+Edit basic.tfvars if you are using Terraform script or slurm-cluster.yaml if you are using Deployment Manager to create Slurm clusters. Here are the steps in Terraform::
+
+  Add "https://www.googleapis.com/auth/devstorage.full_control" to compute_node_scopes, for example:
+
+    compute_node_scopes          = [
+      "https://www.googleapis.com/auth/monitoring.write",
+      "https://www.googleapis.com/auth/logging.write",
+      "https://www.googleapis.com/auth/devstorage.full_control"
+    ]
+
+  (Optional) If you are using a none default service account, make sure it has “Storage Admin” role. If you are using the default service account (i.e., compute_node_service_account = "default"), nothing needs to be done.
+
+  Edit network_storage for worker nodes, for example:
+
+    network_storage = [
+      {
+        server_ip = "none"
+        remote_mount = "dy-test-301718"
+        local_mount = "/data"
+        fs_type = "gcsfuse"
+        mount_options = "file_mode=666,dir_mode=777,allow_other"
+      }
+    ]
+
 Monitoring
 ----------