#!/bin/bash

# Set datagram receiving queue length to 128 for haproxy's socket
sysctl net.unix.max_dgram_qlen=128

# We are intentionally not using exec so we can reload the haproxy config later
echo "Running command: '${CMD}'"
$CMD

# TODO(SamYaple): This has the potential for a race condition triggered by a
#                 config reload that could cause the container to exit
while [[ -e "/proc/$(cat /run/haproxy.pid)" ]]; do
    sleep 5
done

# Based on the above loop this point should never be reached
exit 1

#!/bin/bash

# Set datagram receiving queue length to 128 for haproxy's socket
sysctl net.unix.max_dgram_qlen=128

# We are intentionally not using exec so we can reload the haproxy config later
echo "Running command: '${CMD}'"
$CMD

retry=0
# The loop breaks only when haproxy.pid get missing even after 3 re-try.
while [[ $retry -lt 3 ]]; do
    if [[ ! -e /run/haproxy.pid || ! -d /proc/$(cat /run/haproxy.pid) ]]; then
        retry=$((retry+1))
        sleep 2
        continue
    fi
    retry=0
    sleep 5
done

exit 1

Fix race condition in haproxy
Fix race condition in haproxy

The time period between getting pid
of haproxy service and checking existance of
pid file is very short, if with in this period
haproxy service get reload then the race condition
occured and container get exit as extend_start.sh
script exit.

To minimize the risk of race condition, this patch
let the extend_start.sh script to try upto 3 times
before exit.

Closes-Bug: #1479888

Change-Id: I2f9b7ec832dec8d94a2cdd27ca8a212d0c65a60d
