Merge pull request #104 from TechnologyClassroom/stress

stress bundle

src/.config

@@ -133,6 +133,12 @@ OPENJDK_URL=http://download.java.net/java/GA/jdk9/9/binaries/jdk-9+181_linux-x64
 #
 STATIC_GET_SOURCE_URL=http://s.minos.io/s
 
+# You can find the latest stress archives here:
+#
+#   https://people.seas.harvard.edu/~apw/stress/
+#
+STRESS_SOURCE_URL=https://people.seas.harvard.edu/~apw/stress/stress-1.0.4.tar.gz
+
 # You can find the latest util_linux archives here:
 #
 #   https://www.kernel.org/pub/linux/utils/util-linux/
@@ -245,6 +251,7 @@ COPY_SOURCE_ISO=true
 # nweb       - simple mini http server.
 # openjdk    - installs Open JDK. All operations are automated.
 # static_get - portable binaries for Linux (http://s.minos.io).
+# stress     - CPU and RAM load generator.
 # util_linux - set of executable utilities distributed by the Linux Kernel Org.
 # vim        - an advanced text editor.
 # zlib       - DEFLATE compression/decompression library.

src/README

@@ -94,6 +94,10 @@ Currently available overlay bundles:
                '-net nic,model=e1000 -net user,hostfwd=tcp::8080-:80' to
                'cmd' in the qemu.sh file.
 
+* stress     - simple workload generator. Imposes a configurable amount of CPU,
+               memory, I/O, and disk stress on the system. stress is useful for
+               troubleshooting CPU and RAM.
+
 * util_linux - Set of executable utilities distributed by the Linux Kernel
                similar to busybox or GNU Core Utils.
 

src/minimal_overlay/bundles/stress/01_get.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+# Grab everything after the '=' character.
+DOWNLOAD_URL=$(grep -i STRESS_SOURCE_URL $MAIN_SRC_DIR/.config | cut -f2 -d'=')
+
+# Grab everything after the last '/' character.
+ARCHIVE_FILE=${DOWNLOAD_URL##*/}
+
+# Read the 'USE_LOCAL_SOURCE' property from '.config'
+USE_LOCAL_SOURCE="$(grep -i USE_LOCAL_SOURCE $MAIN_SRC_DIR/.config | cut -f2 -d'=')"
+
+if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE  ] ; then
+  echo "Source bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE is missing and will be downloaded."
+  USE_LOCAL_SOURCE="false"
+fi
+
+cd $MAIN_SRC_DIR/source/overlay
+
+if [ ! "$USE_LOCAL_SOURCE" = "true" ] ; then
+  # Downloading stress source bundle file. The '-c' option allows the download to resume.
+  echo "Downloading stress source bundle from $DOWNLOAD_URL"
+  wget -c $DOWNLOAD_URL
+else
+  echo "Using local stress source bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE"
+fi
+
+# Delete folder with previously extracted stress.
+echo "Removing stress work area. This may take a while..."
+rm -rf $WORK_DIR/overlay/stress
+mkdir $WORK_DIR/overlay/stress
+
+# Extract stress to folder 'work/overlay/stress'.
+# Full path will be something like 'work/overlay/stress/stress-1.0.4'.
+tar -xvf $ARCHIVE_FILE -C $WORK_DIR/overlay/stress
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/stress/02_build.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+cd $WORK_DIR/overlay/stress
+
+DESTDIR="$PWD/stress_installed"
+
+# Change to the stress source directory which ls finds, e.g. 'stress-1.0.4'.
+cd $(ls -d stress-*)
+
+echo "Preparing stress work area. This may take a while..."
+make -j $NUM_JOBS clean
+
+rm -rf $DESTDIR
+
+echo "Configuring stress..."
+CFLAGS="$CFLAGS" ./configure \
+  --prefix=/usr
+
+echo "Building stress..."
+make -j $NUM_JOBS
+
+echo "Installing stress..."
+make -j $NUM_JOBS install DESTDIR=$DESTDIR
+
+echo "Reducing stress size..."
+strip -g $DESTDIR/usr/bin/*
+
+ROOTFS="$WORK_DIR/src/minimal_overlay/rootfs"
+
+cp -r $DESTDIR/* $ROOTFS
+
+echo "stress has been installed."
+
+cd $SRC_DIR

src/minimal_overlay/bundles/stress/bundle.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+SRC_DIR=$(pwd)
+
+./01_get.sh
+./02_build.sh
+
+cd $SRC_DIR
+