Merge branch 'master' into 13804-no-shutdown-wanted-nodes

[arvados.git] / services / nodemanager / doc / ec2.example.cfg

diff --git a/services/nodemanager/doc/ec2.example.cfg b/services/nodemanager/doc/ec2.example.cfg
index a1fa2dc32c21a6676f740ba8321fa4175c143733..f5329ebe16213ad1d7fa37aff09212efce299603 100644 (file)
--- a/services/nodemanager/doc/ec2.example.cfg
+++ b/services/nodemanager/doc/ec2.example.cfg
@@ -65,6 +65,15 @@ boot_fail_after = 1800
 # an Arvados node that hasn't been updated for this long.
 node_stale_after = 14400
 
+# Number of consecutive times a node must report as "idle" before it
+# will be considered eligible for shutdown.  Node status is checked
+# each poll period, and node can go idle at any point during a poll
+# period (meaning a node could be reported as idle that has only been
+# idle for 1 second).  With a 60 second poll period, three consecutive
+# status updates of "idle" suggests the node has been idle at least
+# 121 seconds.
+consecutive_idle_count = 3
+
 # Scaling factor to be applied to nodes' available RAM size. Usually there's a
 # variable discrepancy between the advertised RAM value on cloud nodes and the
 # actual amount available.
@@ -169,12 +178,24 @@ security_groups = idstring1, idstring2
 # You may also want to define the amount of scratch space (expressed
 # in GB) for Crunch jobs.  You can also override Amazon's provided
 # data fields (such as price per hour) by setting them here.
+#
+# Additionally, you can ask for a preemptible instance (AWS's spot instance)
+# by adding the appropriate boolean configuration flag. If you want to have
+# both spot & reserved versions of the same size, you can do so by renaming
+# the Size section and specifying the instance type inside it.
 
 [Size m4.large]
 cores = 2
 price = 0.126
 scratch = 100
 
+[Size m4.large.spot]
+instance_type = m4.large
+preemptible = true
+cores = 2
+price = 0.126
+scratch = 100
+
 [Size m4.xlarge]
 cores = 4
 price = 0.252