From 4447ed460e36348e410288c30cd6e15bb107ba34 Mon Sep 17 00:00:00 2001
From: tth <sigfood@dinorama.fr>
Date: Thu, 3 Jan 2019 16:26:46 +0100
Subject: [PATCH] rrdb : first working code

---
 .gitignore         |  4 +++-
 gnocchi/README.md  |  9 +++++----
 influxdb/README.md |  5 ++++-
 rrdb/README.md     | 14 ++++++++++++++
 rrdb/commun.sh     |  6 ++++++
 rrdb/create.sh     | 21 +++++++++++++++++++++
 rrdb/getvalues.sh  | 19 +++++++++++++++++++
 rrdb/insert.sh     | 14 ++++++++++++++
 8 files changed, 86 insertions(+), 6 deletions(-)
 create mode 100644 rrdb/commun.sh
 create mode 100755 rrdb/create.sh
 create mode 100755 rrdb/getvalues.sh
 create mode 100755 rrdb/insert.sh

diff --git a/.gitignore b/.gitignore
index b0aef2a..4052870 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,7 +12,9 @@ doc/*.idx
 doc/*.ilg
 doc/*.ind
 
-*/foo.dat
+*/*.dat
+
+rrdb/*.png
 
 
 
diff --git a/gnocchi/README.md b/gnocchi/README.md
index e447827..e8ad94e 100644
--- a/gnocchi/README.md
+++ b/gnocchi/README.md
@@ -2,10 +2,11 @@
 
 ## blabla commercial
 
-
-
-_The problem that [Gnocchi](https://gnocchi.xyz/) solves is the storage and indexing of
-time series data and resources at a large scale.
+_The problem that [Gnocchi](https://gnocchi.xyz/) solves is the storage and
+indexing of time series data and resources at a large scale.
 This is useful in modern cloud platforms which are not only huge
 but also are dynamic and potentially multi-tenant.
 Gnocchi takes all of that into account._
+
+Bref, il faut essayer ce truc. Un de ces jours...
+
diff --git a/influxdb/README.md b/influxdb/README.md
index 8a603ab..f949aa4 100644
--- a/influxdb/README.md
+++ b/influxdb/README.md
@@ -12,7 +12,10 @@ purpose-built platform that InfluxData provides._
 
 # On essaye ?
 
-Ok, c'est parti. On va écrire un injecteur en Perl. Puis enchainer sur
+Ok, c'est parti. Premier souci, la documentation est assez légère.
+
+
+On va tenter d'écrire un injecteur en Perl. Puis enchainer sur
 une visualisation dynamique des données en lancer de rayon.
 Projet ambitieux ? Non, la suite sera bien pire.
 
diff --git a/rrdb/README.md b/rrdb/README.md
index 74d6528..1caad84 100644
--- a/rrdb/README.md
+++ b/rrdb/README.md
@@ -6,11 +6,25 @@ loin d'être évidente pour les newbies.
 
 La lecture de la manpage `rrdtutorial` est indispensable.
 
+https://oss.oetiker.ch/rrdtool/tut/rrd-beginners.en.html
+
 ## premier exemple
 
+Un petit peu de code fabriqué à la rache.
+
+- `create.sh`
+- `update.sh`
+- `getvalues.sh`
+
+Suffisant pour comprendre le principe général, mais très flou
+sur les détails.
 
 ## et après ?
 
+Trouver une interface en C pour faciliter la vie des gens.
+
+
+
 
 
 
diff --git a/rrdb/commun.sh b/rrdb/commun.sh
new file mode 100644
index 0000000..8b72f42
--- /dev/null
+++ b/rrdb/commun.sh
@@ -0,0 +1,6 @@
+#
+#	commun definitions for rrdb tests
+#
+
+export RRDB=$HOME/TMP/tests.rrd
+
diff --git a/rrdb/create.sh b/rrdb/create.sh
new file mode 100755
index 0000000..ebd852c
--- /dev/null
+++ b/rrdb/create.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+#
+#	creating the test database
+#
+
+source ./commun.sh
+
+starttime=$(date +'%s')
+
+echo creating $RRDB at ${starttime}s since epoch
+
+rrdtool	create $RRDB			\
+	--start $starttime		\
+	--step 60			\
+	DS:value:GAUGE:150:0:10		\
+	RRA:AVERAGE:0.5:1:60
+
+
+
+		
\ No newline at end of file
diff --git a/rrdb/getvalues.sh b/rrdb/getvalues.sh
new file mode 100755
index 0000000..861ade4
--- /dev/null
+++ b/rrdb/getvalues.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+source ./commun.sh
+
+rrdtool fetch $RRDB LAST			|
+tr -d ':'					|
+awk	'
+	(!/nan/ && NF==2) { print $1, $2 }
+	' 					\
+			> toto
+
+gnuplot << __EOC__
+set term png size 800,600
+set output "graphe.png"
+plot "toto" with lines
+__EOC__
+
+rm toto
+
diff --git a/rrdb/insert.sh b/rrdb/insert.sh
new file mode 100755
index 0000000..3990eb0
--- /dev/null
+++ b/rrdb/insert.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+source ./commun.sh
+
+ctime=$(date +'%s')
+value=$(cut -d ' ' -f 1 /proc/loadavg)
+
+# write value to a file
+echo ${ctime} ${value} | tee -a bar.dat
+
+# inject value in the rrdb file 
+rrdtool	update $RRDB ${ctime}:${value}
+
+