折腾：
期间，用代码：
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/sipevents/sipevents/__init__.py
from flask_rq2 import RQ rq = RQ(app) |
/Users/crifan/dev/dev_root/daryun/SIPEvents/sourcecode/sipevents/sipevents/views.py
############################################################ # Flask-RQ2 ############################################################ from . import rq ############################################################ # Flask-RQ2 related ############################################################ @rq.job def add(x, y): gLog.debug(“x=%s, y=%x”, x, y) return x + y @app.route(‘/creat_event’, methods=[‘GET’, ‘POST’]) @login_required def creat_event(): gLog.debug(“after create event, try use rq2 to run background work”) jobAdd = add.queue(1, 2) gLog.debug(“jobAdd=%s”, jobAdd) scheduledJobAdd = add.schedule(timedelta(seconds=20), 3, 4) # queue job in 20 seconds gLog.debug(“scheduledJobAdd=%s”, scheduledJobAdd) |
结果出错：
after create event, try use rq2 to run background work <div–<—————————————————————————— [2016-09-04 11:22:26 +0000] [19152] [ERROR] Error handling request /creat_event Traceback (most recent call last): File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 135, in handle self.handle_request(listener, req, client, addr) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 176, in handle_request respiter = self.wsgi(environ, resp.start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 2000, in __call__ return self.wsgi_app(environ, start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1991, in wsgi_app response = self.make_response(self.handle_exception(e)) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1567, in handle_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1988, in wsgi_app response = self.full_dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1641, in full_dispatch_request rv = self.handle_user_exception(e) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1544, in handle_user_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1639, in full_dispatch_request rv = self.dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1625, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File “/root/html/SIPEvents/sipevents/views.py”, line 739, in decorated_function return f(*args, **kwargs) File “/root/html/SIPEvents/sipevents/views.py”, line 916, in creat_event jobAdd = add.queue(1, 2) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask_rq2/helpers.py”, line 55, in queue at_front=at_front, File “/root/Envs/SIPEvents/lib/python2.7/site-packages/rq/queue.py”, line 216, in enqueue_call job = self.enqueue_job(job, at_front=at_front) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/rq/queue.py”, line 284, in enqueue_job pipe.execute() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/redis/client.py”, line 2641, in execute return execute(conn, stack, raise_on_error) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/redis/client.py”, line 2495, in _execute_transaction connection.send_packed_command(all_cmds) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/redis/connection.py”, line 538, in send_packed_command self.connect() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/redis/connection.py”, line 442, in connect raise ConnectionError(self._error_message(e)) ConnectionError: Error 97 connecting to localhost:6379. Address family not supported by protocol. |
好像是：
此处后台的redis没有运行，所以出现连接错误？
搜：
ConnectionError: Error 97 connecting to localhost:6379. Address family not supported by protocol.
Flask ConnectionError: Error 97 connecting to localhost:6379. Address family not supported by protocol.
Flask ConnectionError: Error 97 connecting to localhost:6379
socket.error: [Errno 97] Address family not supported by protocol · Issue #242 · liftoff/GateOne
resque – Rescue : Connection refused – Unable to connect to Redis on localhost:6379 – Stack Overflow
(SIPEvents) ➜ SIPEvents ps aux | grep redis root 19236 0.0 0.0 103364 820 pts/1 S+ 11:28 0:00 grep –color=auto –exclude-dir=.bzr –exclude-dir=CVS –exclude-dir=.git –exclude-dir=.hg –exclude-dir=.svn redis (SIPEvents) ➜ SIPEvents |
去试试：
nohup redis-server >> redis.log 2>&1 & |
结果竟然是：
虽然运行了，但是又退出了
期间生成了log文件：
(SIPEvents) ➜ SIPEvents nohup redis-server >> redis.log 2>&1 & [1] 19594 (SIPEvents) ➜ SIPEvents [1] + 19594 exit 1 nohup redis-server >> redis.log 2>&1 (SIPEvents) ➜ SIPEvents netstat -tupln Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:10022 0.0.0.0:* LISTEN 17286/docker-proxy tcp 0 0 0.0.0.0:9000 0.0.0.0:* LISTEN 19706/docker-proxy tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 17220/mysqld tcp 0 0 0.0.0.0:9003 0.0.0.0:* LISTEN 19669/docker-proxy tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 19015/nginx tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1335/sshd tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 17240/docker-proxy tcp 0 0 0.0.0.0:8088 0.0.0.0:* LISTEN 29962/docker-proxy tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN 18421/docker-proxy tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN 19505/docker-proxy tcp 0 0 0.0.0.0:32771 0.0.0.0:* LISTEN 8748/docker-proxy tcp 0 0 0.0.0.0:32772 0.0.0.0:* LISTEN 8782/docker-proxy udp 0 0 192.168.42.1:123 0.0.0.0:* 1346/ntpd udp 0 0 115.29.173.126:123 0.0.0.0:* 1346/ntpd udp 0 0 10.161.170.247:123 0.0.0.0:* 1346/ntpd udp 0 0 127.0.0.1:123 0.0.0.0:* 1346/ntpd udp 0 0 0.0.0.0:123 0.0.0.0:* 1346/ntpd (SIPEvents) ➜ SIPEvents ll total 56K -rw-r–r– 1 root root 833 Sep 2 16:54 config.py -rw-r–r– 1 root root 348 Sep 2 16:59 config.pyc -rw-r–r– 1 root root 6.8K Aug 30 17:53 db_create.py -rw-r–r– 1 root root 773 Aug 29 17:57 db_manager.py -rw-r–r– 1 root root 96 Sep 3 22:25 dump.rdb drwxr-xr-x 2 root root 4.0K Sep 4 11:22 instance drwxr-xr-x 2 root root 4.0K Sep 2 16:39 logs -rw-r–r– 1 root root 281 Sep 4 12:18 redis.log -rw-r–r– 1 root root 431 Sep 2 15:56 requirements.txt -rw-r–r– 1 root root 77 Aug 23 14:39 run.py -rw-r–r– 1 root root 266 Aug 23 15:43 run.pyc drwxr-xr-x 4 root root 4.0K Sep 4 11:06 sipevents drwxr-xr-x 2 root root 4.0K Aug 21 11:04 toDel |
(SIPEvents) ➜ SIPEvents cat redis.log nohup: ignoring input 19594:C 04 Sep 12:18:23.733 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf 19594:M 04 Sep 12:18:23.736 # Creating Server TCP listening socket *:6379: unable to bind socket |
忘了加上配置文件了。。。
(SIPEvents) ➜ SIPEvents nohup redis-server /etc/redis/redis.conf >> redis.log 2>&1 & [1] 19659 (SIPEvents) ➜ SIPEvents netstat -tplun | grep redis tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 19659/redis-server |
可见，已经正常运行了。
此刻的log是：
(SIPEvents) ➜ SIPEvents cat redis.log nohup: ignoring input 19594:C 04 Sep 12:18:23.733 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf 19594:M 04 Sep 12:18:23.736 # Creating Server TCP listening socket *:6379: unable to bind socket nohup: ignoring input _._ _.-“__ ”-._ _.-“ `. `_. ”-._ Redis 3.2.3 (00000000/0) 64 bit .-“ .-“`. “`\/ _.,_ ”-._ ( ‘ , .-` | `, ) Running in standalone mode |`-._`-…-` __…-.“-._|’` _.-‘| Port: 6379 | `-._ `._ / _.-‘ | PID: 19659 `-._ `-._ `-./ _.-‘ _.-‘ |`-._`-._ `-.__.-‘ _.-‘_.-‘| | `-._`-._ _.-‘_.-‘ | http://redis.io `-._ `-._`-.__.-‘_.-‘ _.-‘ |`-._`-._ `-.__.-‘ _.-‘_.-‘| | `-._`-._ _.-‘_.-‘ | `-._ `-._`-.__.-‘_.-‘ _.-‘ `-._ `-.__.-‘ _.-‘ `-._ _.-‘ `-.__.-‘ 19659:M 04 Sep 12:20:34.528 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. 19659:M 04 Sep 12:20:34.529 # Server started, Redis version 3.2.3 19659:M 04 Sep 12:20:34.529 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add ‘vm.overcommit_memory = 1’ to /etc/sysctl.conf and then reboot or run the command ‘sysctl vm.overcommit_memory=1’ for this to take effect. 19659:M 04 Sep 12:20:34.529 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command ‘echo never > /sys/kernel/mm/transparent_hugepage/enabled’ as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled. 19659:M 04 Sep 12:20:34.529 * DB loaded from disk: 0.000 seconds 19659:M 04 Sep 12:20:34.529 * The server is now ready to accept connections on port 6379 |
然后就可以正常运行，至少没有报错了。
［总结］
此处，是由于后台没有运行redis而导致程序出错：
ConnectionError: Error 97 connecting to localhost:6379. Address family not supported by protocol
解决办法就是：
去让redis后台运行
命令是：
nohup redis-server /etc/redis/redis.conf >> redis.log 2>&1 & |
说明：
1.确保此处环境变量中已经有了redis-server，所以可以直接使用
2.确保此处已经有对应的配置文件了：/etc/redis/redis.conf
3.nohup是让，即使当前终端断开，redis仍能在后台运行
4. >> redis.log，是stdout的标准输出，追加输出到对应的log文件redis.log中
5.2>&1，是让2==stderr==标准错误输出，重定向，和上面的stdout一样，也输出到上述log文件redis.log中。其中：&1表示文件描述符1==stdout
6.&，表示让redis在后台运行。
转载请注明：在路上 » ［已解决］用Flask-RQ2运行后台任务失败：ConnectionError Error 97 connecting to localhost 6379