adding dask examples

run_cluster.py

@@ -0,0 +1,42 @@
+import minerva
+from   minerva.pier     import Pier
+
+########### PREP ############################
+
+def worker(pier, n):
+    mach = pier.machine(ami    = "ami-0a3df8365ed416816",  # dask on ubuntu 22.04 x86
+                 instance_type = "t3.medium",
+                 username      = "ubuntu",
+                 name          = f"dask-worker-{n}",
+                 variables     = {"type":   "worker",
+                                  "number": n},
+                 disk_size     = 512)
+    return mach
+
+def scheduler(pier):
+    mach = pier.machine(ami    = "ami-0a3df8365ed416816",  # dask on ubuntu 22.04 x86
+                 instance_type = "t3.medium",
+                 username      = "ubuntu",
+                 name          = f"dask-scheduler",
+                 variables     = {"type": "scheduler"},
+                 disk_size     = 32)
+    return mach
+
+########## CLUSTER ##########################
+
+m       = minerva.Minerva("hay")
+pier    = m.pier(subnet_id = "subnet-05eb26d8649a093e1", # project-subnet-public1-us-east-1a
+                 sg_groups = ["sg-0f9e555954e863954",    # ssh
+                              "sg-0b34a3f7398076545",    # default
+                              "sg-04cd2626d91ac093c"],   # dask (8786, 8787)
+                 key_pair  = ("Ari-Brown-HAY", "~/.ssh/Ari-Brown-HAY.pem"),
+                 iam       = "Minerva")
+
+cluster = pier.cluster(scheduler, worker, num_workers=5)
+cluster.start()
+print(cluster.public_location)
+
+print("press enter to terminate cluster")
+input()
+cluster.terminate()
+