collect-memory-metrics.sh

METRICS="node_memory_Active_anon_bytes node_memory_Active_bytes node_memory_Active_file_bytes node_memory_AnonHugePages_bytes node_memory_AnonPages_bytes node_memory_Bounce_bytes node_memory_Buffers_bytes node_memory_Cached_bytes node_memory_CommitLimit_bytes node_memory_Committed_AS_bytes node_memory_DirectMap1G_bytes node_memory_DirectMap2M_bytes node_memory_DirectMap4k_bytes node_memory_Dirty_bytes node_memory_HardwareCorrupted_bytes node_memory_HugePages_Free node_memory_HugePages_Rsvd node_memory_HugePages_Surp node_memory_HugePages_Total node_memory_Hugepagesize_bytes node_memory_Hugetlb_bytes node_memory_Inactive_anon_bytes node_memory_Inactive_bytes node_memory_Inactive_file_bytes node_memory_KReclaimable_bytes node_memory_KernelStack_bytes node_memory_Mapped_bytes node_memory_MemAvailable_bytes node_memory_MemFree_bytes node_memory_MemTotal_bytes node_memory_Mlocked_bytes node_memory_NFS_Unstable_bytes node_memory_PageTables_bytes node_memory_Percpu_bytes node_memory_SReclaimable_bytes node_memory_SUnreclaim_bytes node_memory_ShmemHugePages_bytes node_memory_ShmemPmdMapped_bytes node_memory_Shmem_bytes node_memory_Slab_bytes node_memory_SwapCached_bytes node_memory_SwapFree_bytes node_memory_SwapTotal_bytes node_memory_Unevictable_bytes node_memory_VmallocChunk_bytes node_memory_VmallocTotal_bytes node_memory_VmallocUsed_bytes node_memory_WritebackTmp_bytes node_memory_Writeback_bytes"
OUTDIR=metrics/memory
PERIOD=${PERIOD:-6h}
mkdir -p $OUTDIR
for METRIC in $METRICS; do
oc exec -c prometheus -n openshift-monitoring prometheus-k8s-0 -- curl --data-urlencode "query=$METRIC[$PERIOD]" http://localhost:9090/api/v1/query > $OUTDIR/$METRIC
done