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Fix issue with tasks/administer-cluster/out-of-resource/

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This commit is contained in:
Jerry Park
2020-10-01 12:57:14 +09:00
parent 28980202c1
commit 45a5a5210f
2 changed files with 1 additions and 1 deletions
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content/en/docs/tasks/administer-cluster/memory-available.sh
-31
View File
@@ -1,31 +0,0 @@
#!/bin/bash
#!/usr/bin/env bash
# This script reproduces what the kubelet does
# to calculate memory.available relative to root cgroup.
# current memory usage
memory_capacity_in_kb=$(cat /proc/meminfo | grep MemTotal | awk '{print $2}')
memory_capacity_in_bytes=$((memory_capacity_in_kb * 1024))
memory_usage_in_bytes=$(cat /sys/fs/cgroup/memory/memory.usage_in_bytes)
memory_total_inactive_file=$(cat /sys/fs/cgroup/memory/memory.stat | grep total_inactive_file | awk '{print $2}')
memory_working_set=${memory_usage_in_bytes}
if [ "$memory_working_set" -lt "$memory_total_inactive_file" ];
then
memory_working_set=0
else
memory_working_set=$((memory_usage_in_bytes - memory_total_inactive_file))
fi
memory_available_in_bytes=$((memory_capacity_in_bytes - memory_working_set))
memory_available_in_kb=$((memory_available_in_bytes / 1024))
memory_available_in_mb=$((memory_available_in_kb / 1024))
echo "memory.capacity_in_bytes $memory_capacity_in_bytes"
echo "memory.usage_in_bytes $memory_usage_in_bytes"
echo "memory.total_inactive_file $memory_total_inactive_file"
echo "memory.working_set $memory_working_set"
echo "memory.available_in_bytes $memory_available_in_bytes"
echo "memory.available_in_kb $memory_available_in_kb"
echo "memory.available_in_mb $memory_available_in_mb"
content/en/docs/tasks/administer-cluster/out-of-resource.md
+1 -1
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@@ -41,7 +41,7 @@ like `free -m`. This is important because `free -m` does not work in a
container, and if users use the [node
allocatable](/docs/tasks/administer-cluster/reserve-compute-resources/#node-allocatable) feature, out of resource decisions
are made local to the end user Pod part of the cgroup hierarchy as well as the
root node. This [script](/docs/tasks/administer-cluster/memory-available.sh)
root node. This [script](/examples/admin/resource/memory-available.sh)
reproduces the same set of steps that the `kubelet` performs to calculate
`memory.available`. The `kubelet` excludes inactive_file (i.e. # of bytes of
file-backed memory on inactive LRU list) from its calculation as it assumes that