Different containers cannot talk to each other via UNIX domain sockets when they are in different network namespaces. There is an unofficial kernel patch that allows this, but you’re on your own if you use it.
chmod 777 /tmp/app.socket This is a solution but not the solution. you should probably run both webservers with the same user and/or same group so you dont have to make your socket world read writable. Also i dont see why a socket needs to be executable. so 6 should be enough. i.e: 660
iptables -I INPUT -p tcp –dport some_port -j LOG then tail -f /var/log/messages Afterwards, to see how much data has been hit by that rule: iptables -L -n -v Or you could run tcpdump and grep out the ports.
This can occur if you create a socket, but never connect() or bind() with it. Your best bet may be to strace (-fF) the application, and then cross-reference with the output of lsof to determine which sockets are causing the issue. As a bonus method of debugging: if you wrap your socket calls with debugging … Read more
Well, it’s simple. Socket is a file based communication, and you can’t access the socket from another machine. On the other hand, ports are open to the world (depends on configuration) and you can access the mysql from other machine using host+port combination. Also, as much I understand sockets, they are just combination of host+port, … Read more
This can happen because of just about any piece of software that incorrectly holds network buffers without releasing them. It just happened to me in Win7 64bit. Chrome and Firefox stopped being able to connect to any web pages, windows file sharing stopped working, and WinSCP and PuTTY both gave errors that included the words … Read more
A socket file doesnt actually contain data, it transports it.. It is a special, unusual type of file created with special system calls/commands. It is not an ordinary file. It is like a pipe the server and the clients can use to connect and exchange requests and data. Also, it is only used locally. Its … Read more
It sounds like the bottleneck is the app powering the socket rather than it being Nginx itself. We see this a lot with PHP when used with sockets versus a TCP/IP connection. In our case, PHP bottlenecks much earlier than Nginx ever would though. Have you checked over the sysctl.conf connection tracking limit, socket backlog … Read more
monit is a great way to monitor and restart services when they fail–and you’ll probably end up using this for other essential services (such as Apache). There’s a nice article on nixCraft detailing how to use this for services specifically, although monit itself has many more functions beyond this. As for the socket aspect, @galraen … Read more
Altough in the time, when the question was asked, it was really impossible, but it is possible nowadays. You can to both: UNIX=>TCP and UNIX=>UNIX forwarding. For example: ssh \ -R/var/run/mysql.sock:/var/run/mysql.sock \ -R127.0.0.1:3306:/var/run/mysql.sock \ somehost It is possible since OpenSSH 6.7.