Apache start / stop / restart / status check

Ubuntu
Apache
here

Explains how to start / stop / restart / check the status of Apache.

Apache status check

To check the status of Apache, use "status" of the systemctl command.

sudo systemctl status apache2

If it is running

If it is running, the following will be displayed.

● apache2.service --The Apache HTTP Server
   Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           mqapache2-systemd.conf
   Active: active (running) since Tue 2020-05-19 08:59:09 JST; 9s ago
  Process: 120415 ExecStop = / usr / sbin / apachectl stop (code = exited, status = 0 / SUCCESS)
  Process: 120947 ExecStart = / usr / sbin / apachectl start (code = exited, status = 0 / SUCCESS)
 Main PID: 120968 (apache2)
    Tasks: 55 (limit: 9479)
   CGroup: /system.slice/apache2.service
           tq120968 / usr / sbin / apache2 -k start
           tq120971 / usr / sbin / apache2 -k start
           mq120972 / usr / sbin / apache2 -k start

When stopped

If it is stopped, the following will be displayed.

● apache2.service --The Apache HTTP Server
   Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset:
  Drop-In: /lib/systemd/system/apache2.service.d
           mqapache2-systemd.conf
   Active: inactive (dead) since Tue 2020-05-19 08:52:07 JST; 3min 51s ago
  Process: 120415 ExecStop = / usr / sbin / apachectl stop (code = exited, status = 0 / SUCCE
 Main PID: 104579 (code = exited, status = 0 / SUCCESS)

Starting Apache

To start Apache, use the systemctl command "start". Run with root privileges using the sudo command.

sudo systemctl start apache2

Even if the boot is successful, the message that it was successful is not returned. Please check the status.

Stop Apache

To stop Apache, use the systemctl command "stop". Run with root privileges using the sudo command.

sudo systemctl stop apache2

If the outage is successful, no successful message will be returned. Please check the status.

Restart Apache

To restart Apache, use the systemctl command "restart". Run with root privileges using the sudo command.

sudo systemctl restart apache2

restart simply executes the stop command and executes the start command. Normally, use the reload command as it will disconnect the processing from the HTTP client.

If the reboot is successful, you will not get a successful message. Please check the status.

Apache graceful restart

A graceful restart of Apache is done using the "reload" systemctl command. Run with root privileges using the sudo command.

sudo systemctl reload apache2

A restart called a graceful restart is a restart that uses a technology that allows Apache to be restarted while correctly returning an HTTP response to an HTTP client connected to Apache. .. It can handle all HTTP client processing correctly, so usually use this restart.

If the reboot is successful, you will not get a successful message. Please check the status.

To see the Apache start / stop log

Servers such as Apache are centrally managed by a program called systemd.

The Apache start / stop log is output to the systemd log.

Use the journalctl command to see the systemd logs. Specify the unit "apache2" with the "-u" option. Please note that you will not be able to see the Apache logs unless you run it with sudo. If you want to see only the last part of the log, combine the "-r" option.

sudo journalctl -r -u apache2

This is a sample log.

--Logs begin at Mon 2020-06-01 15:51:16 JST, end at Thu 2020-07-23 14:37:14 JST.-
Jul 22 13:34:22 shinshina-development-app-00000001 systemd [1]: apache2.service: Failed with result'exit-code'.
Jul 22 13:34:22 shinshina-development-app-00000001 systemd [1]: apache2.service: Main process exited, code = exited, status = 1 / FAILURE
Jul 22 13:24:35 shinshina-development-app-00000001 systemd [1]: Started The Apache HTTP Server.
Jul 22 13:24:35 shinshina-development-app-00000001 apachectl [1299]: AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 10.0.0.4. Set the'ServerName' direct
Jul 22 13:24:33 shinshina-development-app-00000001 systemd [1]: Starting The Apache HTTP Server ...
--Reboot -
Jul 22 13:13:48 shinshina-development-app-00000001 systemd [1]: Stopped The Apache HTTP Server.
Jul 22 13:13:47 shinshina-development-app-00000001 systemd [1]: Stopping The Apache HTTP Server ...
Jul 22 06:25:03 shinshina-development-app-00000001 systemd [1]: Reloaded The Apache HTTP Server.
Jul 22 06:25:03 shinshina-development-app-00000001 systemd [1]: Reloading The Apache HTTP Server.

Check if the Apache configuration file is correct before rebooting

Before restarting Apache (graceful restart), use "apachectl -t" to confirm that the Apache configuration file is correct. If you forget this, the reboot may fail and the web system may stop. It's easy to do, so be careful.

#Apache configuration file test
apachectl -t

To see the Apache systemd configuration file

You can see the Apache systemd configuration file with "systemctl status apache2".

Let's take a look at the configuration file with the cat command.

cat /lib/systemd/system/apache2.service

Start, stop, reloadYou can check the mand definition and so on.

[Unit]
Description = The Apache HTTP Server
After = network.target remote-fs.target nss-lookup.target

[Service]
Type = forking
Environment = APACHE_STARTED_BY_SYSTEMD = true
ExecStart = / usr / sbin / apachectl start
ExecStop = / usr / sbin / apachectl stop
ExecReload = / usr / sbin / apachectl graceful
PrivateTmp = true
Restart = on-abort

[Install]
WantedBy = multi-user.target

Other Apache information

To install Apache

The following article explains how to install Apache.

Installation of apache2 --Apache version 2 series which is a web server

Apache configuration file

The Apache configuration file will be discussed in another article.

Introduction of Ubuntu Server Construction