I have a PHP script that modifies my httpd.conf file, so I need to automatically reload it in Apache.
On Linux, there is graceful restart, but on Windows (I use the restart command) it terminates all the current connections. Is there a command as graceful restart on Windows? Is there a workaround on this?
Yes, you should use the -k switch.
httpd.exe -k restart or apache.exe -k restart
More info here has well. http://www.zrinity.com/developers/apache/usage.cfm
Edit:
It shouldn't that is the point of Graceful. Notice I used the -k. That is not the same as a normal restart. It let's the current sessions complete their task while the config is being reread, so that it will start taking new requests immediately.
From the documentation:
The USR1 or graceful signal causes the parent process to advise the children to exit after their current request (or to exit immediately if they're not serving anything). The parent re-reads its configuration files and re-opens its log files. As each child dies off the parent replaces it with a child from the new generation of the configuration, which begins serving new requests immediately.
http://httpd.apache.org/docs/2.2/stopping.html#graceful
It's doing what you are asking for.
Edit 2:
Adding this link and gave both possible versions because some people think you there is only one specific way to do something instead of search themselves.
http://httpd.apache.org/docs/2.4/platform/windows.html#wincons
I think I'm just going to delete this answer because either people can't read or if it doesn't work for someone it gets a DV. There are different windows versions made by different developers. If it doesn't work look for the answer from them. Even Linux has different commands depending on the distro. geez
In the newest Apache 2.4.20 VC10 the "httpd -k restart" command actually DOES do a graceful restart. It won't drop any connections, for example if somebody is downloading something from your server, it WILL NOT interrupt this process. One more proof is that "-k restart" will not reset your server statistics that mod_status provides, won't even alter the "Restart Time" value.
Although "httpd -k graceful" and "httpd -k graceful-stop" commands are available in Windows, but they will not work giving an error "couldn't make a socket".
Related
In a virtual box I have a Debian that I sometimes want to run without X. So I edited /etc/grub.d/10_linux and added another menu item with a kernel option "nox" appended. Then I added a line to /lib/systemd/system/lightdm.service, Section [Unit]:
ConditionKernelCommandLine=!nox
However, when starting this, it hangs with the message:
A start job is running for Hold until boot process finishes up (56min / no limit)
Thank you, systemd for informing me about that. I wouldn't have noticed. Yet, I would like to know, which job it is that's hanging.
The system allows me to connect via SSH, but none of the systemctl or journalctl commands I tried did tell me the name of the service causing the problem. lightdm.service itself seems to be satisfied.
I known it's a but late, but I just found out that one can use:
systemctl list-jobs
to find out what units are waiting or running at any given moment.
By adding systemd.debug-shell=1 to the kernel command line, a root shell will be available on TTY9 (crlt+alt+F9) to run the command above.
I first tried "systemd-analyze", and that gave me the message about "systemctl list-jobs".
hope this helps someone with similar problems.
I created a Centos 7.3 VM using kickstart using the following command:
virt-install --name=vm1 --disk path=vm1.img,size=20 --vcpus=2 --ram=10240 --os-type=linux --os-variant=rhel7.0 --network bridge=br0 --graphics none --location=http://<IP>/centos7.3 -x "ks=http://<IP>/centos73vm-ks.cfg append ip=<VM IP> netmask=255.255.252.0 gateway=<gw> bootproto=static console=ttyS0"
This works fine. VM is created, rebooted automatically and the node is usable. However, the problem with this is that I cannot use it to automate since I don't get the control back. To do that, I added the --noautoconsole options of the virt-install command at the end of the above command.
After doing so, VM is installed, but after reboot it does not come up automatically. It remains in shut off state. I need to start it manually. There are no errors on logging to the console. May someone give any leads on how to fix this?
Any help would be greatly appreciated. Thanks in advance.
you need to add --wait=-1 so that virt-install waits for the installation to complete before exiting. The vm will then automatically start when the installation completes.
this sure sounds like an issue that was covered on the RedHat customer portal. I'm not sure if that requires a paid license but your company (or you) might have one already?
-- Jonas
Could anybody help me how to shutdown elasticSearch completely ! It starts automatically when system starts.
Yes, it should because you are initialing it in the config file, which fires every time the system starts.
To answer your question, I believe this answer should help.
It probably runs as a service. If it is on linux remove the service file, usually on /etc/init.d/elasticsearch
If it is on windows - there is a service.bat file on the installation/bin folder, you can uninstall using:
service.bat remove
If you are using Ubuntu 15.04+
systemctl disable elasticsearch
For Ubuntu < 15.04
To toggle a service from starting or stopping permanently you would need to:
echo manual | sudo tee /etc/init/SERVICE.override
where the stanza manual will stop Upstart from automatically loading the service on next boot. Any service with the .override ending will take precedence over the original service file. You will only be able to start the service manually afterwards. If you do not want this then simply delete the .override.
For more details, you may check this
I want to reload the mosquitto password file when it is changed.
Is possible to send SIGHUP ("signal hang up") or some equivalent to mosquitto server on windows?
It is possible to do so. First you have to set your mosquitto.conf to save the pid in a file by specifying the pid_file.
pid_file your/pid/file
Then you can call
$kill -SIGHUP $(cat your/pid/file).
Or else if you already know the PID of the mosquitoo, then you can do
$kill -SIGHUP PID
This will send sighup signal and reload the pwfile. More info can be found at mosquitto conf
Since I found this thread looking for an answer on Linux I think this reply is relevant for some.
I think I found a simplified version of dulaj's answer (for Linux). If you look at /etc/init.d/mosquitto (found on Mosquitto v.31) you'll see there is a "reload" option which has adds "--signal HUP" to the start-stop-daemon and it listed as "Reloading network daemon configuration: mosquitto".
So you should be able to run "sudo service mosquitto reload"
I don't think you can, but you could use the mosquitto-auth-plugin which allows you to keep the ACL in a database that you can update while mosquitto is running.
This lets you a range of different database backends and you can add, remove, change ACL and users on the fly.
As of version 1.5 of Mosquitto, you can signal the named event mosq<pid>_reload (the relevant code change).
Sample code:
auto h = OpenEvent(EVENT_MODIFY_STATE, FALSE, "mosq0000_reload");
SetEvent(h);
Example to get the pid in Windows can be found at https://learn.microsoft.com/en-us/windows/win32/psapi/enumerating-all-processes.
I am currently trying to deploy smartfoxserver 2X on EC2 using dotcloud. I have been able to detect the private ip of the amazon web instance, and using the dotcloud tools I have been able to determine the correct port. However, I have difficulty installing the server proper via the command line so that I can log into it using the AdminTool.
My postinstall is fairly straightforward:
./SFS2X/sfs2x-service start-launchd
I find that on 'dotcloud push' there is a fair amount of promising output in my cygwin terminal, but the push hangs after saying that the sfs2x-service has been launched correctly, until timeout.
Consequently, my question is, has anyone found a way to install SFS2X on EC2 via dotcloud successfully? I managed to have partial success with SFS Pro, with a complete push to dotcloud, by calling ./jre/bin/java -jar installer.jar in my postinstall. Do I need to do extra legwork and build an installer jar for SFS2X? Is there a way that would be best to do this?
I do understand that there is a standard approach to deployment with SFS2X using RightScale on EC2, however I am interested in deployment using the dotcloud platform.
Thanks in advance.
The reason why it is hanging is because you are trying to start your process in the postinstall, and this is not the correct place to do that. The postinstall script is suppose to finish, if it doesn't the deployment will time out, and then get cancelled.
Once the postinstall script is finished, it will then finish the rest of your deployment.
See this page for more information about dotCloud postinstall script:
http://docs.dotcloud.com/0.9/guides/hooks/#post-install
Pay attention to this warning at the end.
Warning:
If your post-install script returns an error (non-zero exit code), or if it runs for more than 10 minutes, the platform will consider that your build has failed, and the new version of your code will not be deployed.
Instead of putting this in the postinstall script, you should add it as a background process, so that it starts up once the deployment process is complete.
See this page for more information on adding background processes to dotCloud services:
http://docs.dotcloud.com/0.9/guides/daemons/
TL;DR: You need to create a supervisord.conf file, and add it to the root of your project, and add your service to that.
Example (you will need to change to fit your situation):
[program:smartfoxserver]
command = /home/dotcloud/current/SFS2X/sfs2x-service start-launchd
Also, make sure you have the correct dotCloud service specified in your dotcloud.yml in order to have the correct binary and libraries installed for what your smartfoxserver application.