History

commit-bot@chromium.org 9f3b925e76 Ping MySQL every minute in an attempt to keep the connection alive. I've tried various MySQL server settings, and some TCP settings on the webtry server, none seem to keep the connection from hanging, so this is a brute-force solution. BUG=skia: R=mtklein@google.com Author: jcgregorio@google.com Review URL: https://codereview.chromium.org/286543003 git-svn-id: http://skia.googlecode.com/svn/trunk@14720 2bbb7eff-a529-9590-31e7-b0007b416f81		2014-05-14 12:55:34 +00:00
..
res	Square pixels on zoom.	2014-05-06 13:04:35 +00:00
setup	Run Squid as a reverse caching proxy on port 80 and proxy the requests	2014-05-01 20:10:03 +00:00
sys	Run Squid as a reverse caching proxy on port 80 and proxy the requests	2014-05-01 20:10:03 +00:00
templates	remove unused Kernel33MaskFilter	2014-05-12 13:35:55 +00:00
DESIGN.md	Run Squid as a reverse caching proxy on port 80 and proxy the requests	2014-05-01 20:10:03 +00:00
main.cpp	First pass at workspaces.	2014-04-19 13:55:50 +00:00
README.md	Run Squid as a reverse caching proxy on port 80 and proxy the requests	2014-05-01 20:10:03 +00:00
result.cpp	Initial code for webtry, a web application for allowing users to try out Skia.	2014-04-09 18:59:44 +00:00
safec++	Set ulimits for the compile stage.	2014-04-30 19:38:51 +00:00
seccomp_bpf.h	Sanitizing source files in Housekeeper-Nightly	2014-04-10 03:05:44 +00:00
TODO.md	Factor out common template code. Send stdout back to web page.	2014-04-22 21:13:45 +00:00
webtry.go	Ping MySQL every minute in an attempt to keep the connection alive.	2014-05-14 12:55:34 +00:00

README.md

WebTry

Allows trying out Skia code in the browser. Run a local webserver and from the pages it serves try out Skia code and see the results immediately. To make sandboxing easier this must be built w/GPU off.

Running Locally

$ GYP_GENERATORS=ninja  ./gyp_skia  gyp/webtry.gyp gyp/most.gyp -Dskia_gpu=0
$ ninja -C out/Debug webtry
$ cd experimental/webtry
$ go build webtry.go
$ ./webtry

Then visit http://localhost:8000 in your browser.

Only tested under linux, doubtful it will work on other platforms.

Full Server Setup

Create a GCE instance:

gcutil --project=google.com:skia-buildbots addinstance skia-webtry-b \
  --zone=us-central2-b --external_ip_address=108.170.220.126 \
  --service_account=default \
  --service_account_scopes="https://www.googleapis.com/auth/devstorage.full_control" \
  --network=default --machine_type=n1-standard-1 --image=backports-debian-7-wheezy-v20140331 \
  --persistent_boot_disk

Make sure port 80 is accessible externally for the above instance.

SSH into the instance:

gcutil --project=google.com:skia-buildbots ssh --ssh_user=default skia-webtry-b

Do once

The following things only need to be done once

sudo apt-get install git schroot debootstrap
git clone https://skia.googlesource.com/skia
Add the following to /etc/fstab and reboot:

none /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0

The above will allow ninja to run. See http://stackoverflow.com/questions/2009278/python-multiprocessing-permission-denied

Add the following to the /etc/schroot/minimal/fstab:

/home/webtry/inout /inout none rw,bind 0 0
Change /etc/monit/monitrc to:

set daemon 2

then run the following so it applies:

sudo /etc/init.d/monit restart

This means that monit will poll every two seconds that our application is up and running.

Set the TCP keepalive. For more info see: https://developers.google.com/cloud-sql/docs/gce-access

sudo bash -c 'echo 60 > /proc/sys/net/ipv4/tcp_keepalive_time'

Do the first time

Do the following the first time you setup a machine, and each time you want to update the code running on the server

cd ~/skia/experimental/webtry/setup
./webtry_setup.sh

Once, after setup

Do this step only once, but only after running webtry_setup.sh the first time

sudo debootstrap --variant=minbase wheezy /srv/chroot/webtry