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29 lines
865 B
Bash
29 lines
865 B
Bash
#!/bin/sh
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# This script reproduces what the kubelet does to calculate
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# memory.available relative to root cgroup. (Adapted from
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# https://kubernetes.io/examples/admin/resource/memory-available.sh)
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memk=$(grep MemTotal /proc/meminfo)
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memk=${memk##MemTotal: }
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memk=${memk%% kB}
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memb=$((memk * 1024))
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used=$(cat /sys/fs/cgroup/memory/memory.usage_in_bytes)
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inactive=$(grep total_inactive_file /sys/fs/cgroup/memory/memory.stat)
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inactive=${inactive##* }
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working=0
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test "$used" -ge "$inactive" && working=$((memb - inactive))
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availb=$((memb - working))
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availk=$((availb / 1024))
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availm=$((availk / 1024))
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availg=$(echo "scale=1; $availm / 1024" | bc)
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echo "capacity: $memb"
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echo "usage: $used"
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echo "inactive: $inactive"
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echo "working: $working"
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echo "available: $availb"
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echo "availableK: $availk"
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echo "availableM: $availm"
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echo "availableG: $availg"
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