pose la preuve de concept

Makefile

@@ -0,0 +1,147 @@
+NOW = $(shell date +%s )
+STEP = 60
+
+SUCCESS = 198754
+DANGER = DC3545
+INFO = 0DCAF0
+
+DANGER1 = F8D7DA
+DANGER2 = F1AEB5
+DANGER3 = EA868F
+DANGER4 = E35D6A
+DANGER5 = DC3545
+DANGER6 = B02A37
+DANGER7 = 842029
+DANGER8 = 58151C
+DANGER9 = 2C0B0E
+
+INFO1 = 0AA2C0
+INFO2 = 0DCAF0
+INFO3 = 3DD5F3
+
+IFACE = eth0
+
+FORMAT = SVG
+EXTENSION = .$(shell echo $(FORMAT) |tr '[:upper:]' '[:lower:]')
+
+DAY_IN_SECS = 86400
+
+all:
+
+cpu.rrd:
+	rrdtool create $@ --start $$(( $(NOW) - 1 )) --step $(STEP) --no-overwrite \
+		DS:user:GAUGE:120:0:100 \
+		DS:nice:GAUGE:120:0:100 \
+		DS:sys:GAUGE:120:0:100 \
+		DS:iowait:GAUGE:120:0:100 \
+		DS:steal:GAUGE:120:0:100 \
+		DS:irq:GAUGE:120:0:100 \
+		DS:soft:GAUGE:120:0:100 \
+		DS:guest:GAUGE:120:0:100 \
+		DS:gnice:GAUGE:120:0:100 \
+		DS:idle:GAUGE:120:0:100 \
+		RRA:LAST:0.5:1:1440 \
+		RRA:AVERAGE:0.5:420:1440 \
+		RRA:AVERAGE:0.5:1860:1440 \
+		RRA:AVERAGE:0.5:21900:1440
+
+update_cpu: cpu.rrd
+	rrdtool update $< $(NOW):$(shell LANG=C sar -u ALL 0 -1 |tail -n1 |awk '{print $$3,$$4,$$5,$$6,$$7,$$8,$$9,$$10,$$11,$$12}' |tr ' ' ':' )
+
+load.rrd:
+	rrdtool create $@ --start $$(( $(NOW) - 1 )) --step $(STEP) --no-overwrite \
+		DS:ldavg-1:GAUGE:120:0:U \
+		DS:ldavg-5:GAUGE:120:0:U \
+		DS:ldavg-15:GAUGE:120:0:U \
+		RRA:LAST:0.5:1:1440 \
+		RRA:AVERAGE:0.5:420:1440 \
+		RRA:AVERAGE:0.5:1860:1440 \
+		RRA:AVERAGE:0.5:21900:1440
+
+update_load: load.rrd
+	rrdtool update $< $(NOW):$(shell LANG=C sar -q LOAD 0 -1 |tail -n1 |awk '{print $$4,$$5,$$6}' |tr ' ' ':' )
+
+mem.rrd:
+	rrdtool create $@ --start $$(( $(NOW) - 1 )) --step $(STEP) --no-overwrite \
+		DS:kbmemfree:GAUGE:120:0:U \
+		DS:kbbuffers:GAUGE:120:0:U \
+		DS:kbcached:GAUGE:120:0:U \
+		DS:kbslab:GAUGE:120:0:U \
+		RRA:LAST:0.5:1:1440 \
+		RRA:AVERAGE:0.5:420:1440 \
+		RRA:AVERAGE:0.5:1860:1440 \
+		RRA:AVERAGE:0.5:21900:1440
+
+update_mem: mem.rrd
+	rrdtool update $< $(NOW):$(shell LANG=C sar -r ALL 0 -1 |tail -n1 |awk '{print $$2,$$6,$$7,$$14}' |tr ' ' ':' )
+
+net.rrd:
+	rrdtool create $@ --start $$(( $(NOW) - 1 )) --step $(STEP) --no-overwrite \
+		DS:rbytes:COUNTER:120:0:U \
+		DS:tbytes:COUNTER:120:0:U \
+		RRA:LAST:0.5:1:1440 \
+		RRA:AVERAGE:0.5:420:1440 \
+		RRA:AVERAGE:0.5:1860:1440 \
+		RRA:AVERAGE:0.5:21900:1440
+
+update_net: net.rrd
+	rrdtool update $< $(NOW):$(shell cat /proc/net/dev |grep $(IFACE) |awk '{print $$2,$$10}' |tr ' ' ':' )
+
+update: update_cpu update_load update_mem update_net
+
+run:
+	while true; do make update; sleep $(STEP); done
+
+cpu-daily$(EXTENSION): cpu.rrd
+	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		DEF:user=$<:user:AVERAGE \
+		DEF:nice=$<:nice:AVERAGE \
+		DEF:sys=$<:sys:AVERAGE \
+		DEF:iowait=$<:iowait:AVERAGE \
+		DEF:steal=$<:steal:AVERAGE \
+		DEF:irq=$<:irq:AVERAGE \
+		DEF:soft=$<:soft:AVERAGE \
+		DEF:guest=$<:guest:AVERAGE \
+		DEF:gnice=$<:gnice:AVERAGE \
+		DEF:idle=$<:idle:AVERAGE \
+		AREA:user#$(DANGER1):user:STACK \
+		AREA:nice#$(DANGER2):nice:STACK \
+		AREA:sys#$(DANGER3):sys:STACK \
+		AREA:iowait#$(DANGER4):iowait:STACK \
+		AREA:steal#$(DANGER5):steal:STACK \
+		AREA:irq#$(DANGER6):irq:STACK \
+		AREA:soft#$(DANGER7):soft:STACK \
+		AREA:guest#$(DANGER8):guest:STACK \
+		AREA:gnice#$(DANGER9):gnice:STACK \
+		AREA:idle#$(SUCCESS):idle:STACK
+
+load-daily$(EXTENSION): load.rrd
+	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		DEF:ldavg-1=$<:ldavg-1:AVERAGE \
+		DEF:ldavg-5=$<:ldavg-5:AVERAGE \
+		DEF:ldavg-15=$<:ldavg-15:AVERAGE \
+		LINE1:ldavg-1#$(INFO1):ldavg-1 \
+		LINE1:ldavg-5#$(INFO2):ldavg-5 \
+		LINE1:ldavg-15#$(INFO3):ldavg-15
+
+mem-daily$(EXTENSION): mem.rrd
+	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		DEF:kbmemfree=$<:kbmemfree:AVERAGE \
+		DEF:kbbuffers=$<:kbbuffers:AVERAGE \
+		DEF:kbcached=$<:kbcached:AVERAGE \
+		DEF:kbslab=$<:kbslab:AVERAGE \
+		AREA:kbbuffers#$(DANGER1):kbbuffers:STACK \
+		AREA:kbcached#$(DANGER2):kbcached:STACK \
+		AREA:kbslab#$(DANGER3):kbslab:STACK \
+		AREA:kbbuffers#$(DANGER4):kbbuffers:STACK \
+		AREA:kbmemfree#$(SUCCESS):kbmemfree:STACK
+
+net-daily$(EXTENSION): net.rrd
+	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		DEF:rbytes=$<:rbytes:AVERAGE \
+		DEF:tbytes=$<:tbytes:AVERAGE \
+		CDEF:ntbytes=tbytes,-1,* \
+		AREA:rbytes#$(DANGER):rbytes \
+		AREA:ntbytes#$(SUCCESS):tbytes
+
+graph: cpu-daily$(EXTENSION) load-daily$(EXTENSION) mem-daily$(EXTENSION) net-daily$(EXTENSION)

README.md

@@ -113,16 +113,21 @@ rrdtool graph cpu-daily.svg --imgformat SVG --end now --start end-86400s \
 	DEF:guest=cpu.rrd:guest:AVERAGE \
 	DEF:gnice=cpu.rrd:gnice:AVERAGE \
 	DEF:idle=cpu.rrd:idle:AVERAGE \
-	AREA:user:STACK \
-	AREA:nice:STACK \
-	AREA:sys:STACK \
-	AREA:iowait:STACK \
-	AREA:steal:STACK \
-	AREA:irq:STACK \
-	AREA:soft:STACK \
-	AREA:guest:STACK \
-	AREA:gnice:STACK \
-	AREA:idle:STACK
+	AREA:user#FF0000:user:STACK \
+	AREA:nice#FF1111:nice:STACK \
+	AREA:sys#FF2222:sys:STACK \
+	AREA:iowait#FF3333:iowait:STACK \
+	AREA:steal#FF4444:steal:STACK \
+	AREA:irq#FF5555:irq:STACK \
+	AREA:soft#FF6666:soft:STACK \
+	AREA:guest#FF7777:guest:STACK \
+	AREA:gnice#FF8888:gnice:STACK \
+	AREA:idle#00FF00:idle:STACK
 ```
 
+Il faudra trouver des jolies couleurs. Et éviter le blanc parce qu'il n'est pas tracé.
 
+## Notes
+
+Pour vider les caches mémoire : `echo 2 > /proc/sys/vm/drop_caches`, cf [la
+doc](https://www.kernel.org/doc/html/latest/admin-guide/sysctl/vm.html#drop-caches)