daemon

Control a python thread from outside

由 妖精的绣舞 提交于 2019-12-25 16:57:35
问题 I have a program, which needs to continuously run in the background, but be able to receive instructions to change. I have this thread running, which sends data to an Arduino and receives data back: class receiveTemp (threading.Thread): def __init__(self, out): threading.Thread.__init__(self) self.out = out def run(self): self.alive = True try: while self.alive: rec = send("command") self.out.write(rec) except BaseException as Error: print(Error) pass Now I need to change the command I send

Docker的安装及加速

由 谁说我不能喝 提交于 2019-12-25 16:16:39
使用 yum 安装（CentOS 7下） Docker 要求 CentOS 系统的内核版本高于 3.10 ，查看本页面的前提条件来验证你的CentOS 版本是否支持 Docker 。 通过 uname -r 命令查看你当前的内核版本 [root@runoob ~]# uname -r 3.10.0-327.el7.x86_64 安装 Docker Docker 软件包和依赖包已经包含在默认的 CentOS-Extras 软件源里，安装命令如下： [root@runoob ~]# yum -y install docker-io 安装完成。 启动 Docker 后台服务 [root@runoob ~]# service docker start 测试运行 hello-world [root@runoob ~]#docker run hello-world 由于本地没有hello-world这个镜像，所以会下载一个hello-world的镜像，并在容器内运行。 使用脚本安装 Docker 1、使用 sudo 或 root 权限登录 Centos。 2、确保 yum 包更新到最新。 sudo yum update 3、执行 Docker 安装脚本。 curl -fsSL https://get.docker.com/ | sh 执行这个脚本会添加 docker.repo 源并安装

Execute script with Ruby on Rails?

由 爷，独闯天下 提交于 2019-12-25 14:25:13
问题 I want to start my daemon with my application. In the command line, I can write something like lib/daemons/mydaemon_ctl start to start up my daemon, but I have to do this manually. I want the daemon to start when I start my server (i.e. when the initializer files are loaded). Is there a ruby command for executing a command line? Something like exec "lib/daemons/mydaemon_ctl start" ? Thanks! 回答1: Seems you just want to run shell commands in ruby code, well you can use system or backtick(`)

Execute script with Ruby on Rails?

由 大城市里の小女人 提交于 2019-12-25 14:25:10
问题 I want to start my daemon with my application. In the command line, I can write something like lib/daemons/mydaemon_ctl start to start up my daemon, but I have to do this manually. I want the daemon to start when I start my server (i.e. when the initializer files are loaded). Is there a ruby command for executing a command line? Something like exec "lib/daemons/mydaemon_ctl start" ? Thanks! 回答1: Seems you just want to run shell commands in ruby code, well you can use system or backtick(`)

Detect when a script delays and allow it to skip or continue in PHP

由 元气小坏坏 提交于 2019-12-25 14:10:36
问题 I have a file, lets say file1.php, that within the script executes a file using: exec("php-cli -f _DAEMON.php") after executing the exec() command, it needs to run more code, the problem is that _DAEMON.php as its name says, is a Daemon and it will never stop running, so it freezes file1.php without allowing the rest of the code to run. Is there a way to allow the code to continue executing even if exec("php-cli -f _DAEMON.php") has not finished. Or to detect if the code delays for more than

Cannot stop C daemon in certain situations from PHP

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-25 11:50:46
问题 I have created a simple C daemon in Linux. The daemon is setup to catch the SIGTERM signal, do some cleanup and terminate. When run from the command line, this behaves as expected. Sending a SIGTERM to the daemon via the kill command gets handled properly. I would however like to be able to start and stop the daemon from a PHP application. I do this using exec() in PHP. To start exec("$daemon_name"); and to stop exec("kill $daemon_pid"); Starting the daemon this way always works, but stopping

modifying python daemon script, stop does not return OK (but does kill the process)

由 好久不见. 提交于 2019-12-25 05:28:57
问题 Following on from the previous post, the script now start and stops the python script (and only that particular script) correctly but does not report the OK back to the screen... USER="root" APPNAME="myPythonApp1" APPBIN="/usr/bin/python" APPARGS="/usr/local/sbin/app1/app.py" LOGFILE="/var/log/$APPNAME/error.log" LOCKFILE="/var/lock/subsys/$APPNAME" LOGPATH=$(dirname $LOGFILE) prog=$APPBIN start() { [ -x $prog ] || exit 5 [ -d $LOGPATH ] || mkdir $LOGPATH [ -f $LOGFILE ] || touch $LOGFILE

MySQL Daemon issue

由 社会主义新天地 提交于 2019-12-25 00:26:19
问题 I seem to be having an issue with my MySQL Daemon and a World-writable config file being ignored :S Here's the output when I run mysqld as user mysql: bash-4.2$ mysqld Warning: World-writable config file '/etc/mysql/my.cnf' is ignored 120730 17:57:34 [Note] Plugin 'FEDERATED' is disabled. 120730 17:57:34 InnoDB: The InnoDB memory heap is disabled 120730 17:57:34 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120730 17:57:34 InnoDB: Compressed tables use zlib 1.2.5 120730 17:57:34 InnoDB

Controlling a C daemon from another program

由 ￣綄美尐妖づ 提交于 2019-12-24 18:31:10
问题 I'm trying to control a C daemon program from another userspace program. - Simple C daemon This daemon is simply a C program which daemonize itself and log a message every second through syslog. #include <stdlib.h> #include <stdio.h> #include <syslog.h> #include <unistd.h> #include <signal.h> void bye(); int main() { printf("Daemon starting ...\n"); openlog("daemon-test", LOG_PID, LOG_DAEMON); signal(SIGTERM, bye); if(0 != daemon(0, 0)) { syslog(LOG_ERR, "Can't daemonize\n"); return EXIT

modifying python daemon script, stop does not work

由 对着背影说爱祢 提交于 2019-12-24 16:08:04
问题 I'm trying to modify this example using some input from here as I want only to stop the specific Python app running as a daemon because there will be others as well on the same server running on Python so don't want kill all python scripts... The server runs the Amazon Linux which I believe is CentOS. USER="root" APPNAME="myPythonApp1" APPBIN="/usr/bin/python" APPARGS="/usr/local/sbin/app1/app.py" LOGFILE="/var/log/$APPNAME/error.log" LOCKFILE="/var/lock/subsys/$APPNAME" LOGPATH=$(dirname
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