KVM resiliency test: update docstring about how to setup disk image.

parent 9e819a84
......@@ -109,7 +109,9 @@ def runTestSuite(server_url, key_file, cert_file,
3/ Resilience is done, wait XX seconds
4/ For each clone: do a takeover. Check that IPv6 of new main instance is different. Check, when doing a http request to the new VM that will fetch the stored random number, that the sent number is the same.
Note: disk image is a simple debian with the following python code running at boot:
Note: disk image is a simple debian with gunicorn and flask installed:
apt-get install python-setuptools; easy_install gunicorn flask
With the following python code running at boot in /root/number.py:
import os
......@@ -119,7 +121,7 @@ def runTestSuite(server_url, key_file, cert_file,
storage = 'storage.txt'
@app.route("/")
def greeting_list(): # 'cause they are several greetings, and plural is forbidden.
def greeting_list(): # 'cause there are several greetings, and plural is forbidden.
return "Hello World"
@app.route("/get")
......@@ -128,13 +130,39 @@ def runTestSuite(server_url, key_file, cert_file,
@app.route("/set")
def set():
if os.path.exists(storage):
abort(503)
#if os.path.exists(storage):
# abort(503)
open(storage, 'w').write(request.args['key'])
return "OK"
if __name__ == "__main__":
app.run(host='0.0.0.0', port=80)
Then create the boot script:
echo "cd /root; /usr/local/bin/gunicorn number:app -b 0.0.0.0:80 -D --error-logfile /root/error_log --access-logfile /root/access_log" > /etc/init.d/gunicorn-number
chmod +x /etc/init.d/gunicorn-number
update-rc.d gunicorn-number defaults
There also is a script that randomly generates I/O in /root/io.sh:
#!/bin/sh
# Randomly generates high I/O on disk. Goal is to write on disk so that
# it flushes at the same time that snapshot of disk image is done, to check if
# it doesn't corrupt image.
# Ayayo!
while [ 1 ]; do
dd if=/dev/urandom of=random count=2k
sync
sleep 0.2
done
Then create the boot script:
echo "/bin/sh /root/io.sh &" > /etc/init.d/io
chmod +x /etc/init.d/io
update-rc.d io defaults
"""
slap = slapos.slap.slap()
slap.initializeConnection(server_url, key_file, cert_file)
......
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