I am running a Docker container with Swift ("Swift all-in-one") on a CentOS 7 host. I noticed that the PIDs in /var/run/swift/*.pid files differ from the actual PIDs running in the system:
root@5293f4890016:/var/run/swift# for pidfile in `ls`; do echo $pidfile: `cat $pidfile`; done
account-auditor.pid: 219
account-reaper.pid: 285
account-replicator.pid: 291
account-server.pid: 274
container-auditor.pid: 264
container-replicator.pid: 256
container-server.pid: 267
container-sync.pid: 288
container-updater.pid: 216
object-auditor.pid: 259
object-replicator.pid: 222
object-server.pid: 297
object-updater.pid: 294
proxy-server.pid: 225
root@5293f4890016:/var/run/swift# ps ax | egrep "account|container|object|proxy"
21 ? S 0:00 /usr/bin/python /usr/bin/swift-container-server /etc/swift/container-server.conf
22 ? S 0:00 /usr/bin/python /usr/bin/swift-account-reaper /etc/swift/account-server.conf
23 ? Sl 0:00 /usr/bin/python /usr/bin/swift-object-replicator /etc/swift/object-server.conf
24 ? S 0:00 /usr/bin/python /usr/bin/swift-account-auditor /etc/swift/account-server.conf
25 ? S 0:00 /usr/bin/python /usr/bin/swift-object-server /etc/swift/object-server.conf
27 ? S 0:00 /usr/bin/python /usr/bin/swift-account-replicator /etc/swift/account-server.conf
28 ? S 0:00 /usr/bin/python /usr/bin/swift-account-server /etc/swift/account-server.conf
30 ? S 0:00 /usr/bin/python /usr/bin/swift-proxy-server /etc/swift/proxy-server.conf
31 ? S 0:00 /usr/bin/python /usr/bin/swift-object-updater /etc/swift/object-server.conf
81 ? S 0:00 /usr/bin/python /usr/bin/swift-object-server /etc/swift/object-server.conf
82 ? S 0:00 /usr/bin/python /usr/bin/swift-container-server /etc/swift/container-server.conf
83 ? S 0:00 /usr/bin/python /usr/bin/swift-account-server /etc/swift/account-server.conf
84 ? S 0:00 /usr/bin/python /usr/bin/swift-proxy-server /etc/swift/proxy-server.conf
114 ? S 0:00 /usr/bin/python /usr/bin/swift-container-sync /etc/swift/container-server.conf
135 ? S+ 0:00 egrep account|container|object|proxy
I am having problems trying to (re)configure the Swift proxy server and restarting it due to that. It seems that swift-init looks for PID 225 (see the output above) and it can't find it (since that is not the actual PID) and then tries to start the proxy server but the port is obviously already bound.
Am I missing something, or is there maybe something wrong with my setup?
root@5293f4890016:/# swift-init proxy-server restart
Signal proxy-server pid: 225 signal: 15
No proxy-server running
WARNING: Unable to modify file descriptor limit. Running as non-root?
Starting proxy-server...(/etc/swift/proxy-server.conf)
Traceback (most recent call last):
File "/usr/bin/swift-proxy-server", line 23, in <module>
sys.exit(run_wsgi(conf_file, 'proxy-server', default_port=8080, **options))
File "/usr/lib/python2.7/dist-packages/swift/common/wsgi.py", line 381, in run_wsgi
sock = get_socket(conf, default_port=kwargs.get('default_port', 8080))
File "/usr/lib/python2.7/dist-packages/swift/common/wsgi.py", line 173, in get_socket
bind_addr[0], bind_addr[1], bind_timeout))
Exception: Could not bind to 0.0.0.0:8080 after trying for 30 seconds
I am not sure what was wrong with my Swift installation, but I reinstalled it and everything worked fine. If you hit the same issue, try reinstalling Swift.