mkubenka · March 23, 2020 16:03 · Mar 23, 2020
diff --git a/centos_php_fpm_coredumps.md b/centos_php_fpm_coredumps.md
@@ -0,0 +1,58 @@
+# CentOS PHP-FPM coredumps
+
+> https://wiki.archlinux.org/index.php/Core_dump
+
+Enabling core dumps for PHP-FPM on CentOS 7 require several steps.
+
+Set the `rlimit_core` directive in */etc/php-fpm.d/pool.conf* and */etc/php-fpm.conf* to unlimited:
+
+```ini
+rlimit_core = unlimited
+```
+
+Set system parameters to generate core dumps:
+
+```bash
+# Send dumps via a pipe to the systemd-coredump
+sysctl kernel.core_pattern='| /usr/lib/systemd/systemd-coredump %p %u %g %s %t %c %e'
+
+# Enable core dumps for processes using setuid().
+sysctl fs.suid_dumpable=2 
+
+# Do not add PID to core dump file.
+sysctl kernel.core_uses_pid=0
+```
+
+Add to */etc/systemd/system.conf* file:
+
+```bash
+DefaultLimitCORE=infinity
+```
+
+Reload systemd configuration:
+
+```bash
+systemctl daemon-reload
+```
+
+Restart PHP-FPM:
+
+```bash
+systemctl restart php-fpm
+```
+
+To confirm core dump was generated look for `SIGSEGV - core dumped` in PHP-FPM error log:
+
+```
+[11-May-2015 15:34:03] WARNING: [pool www] child 2553 exited on signal 11 (SIGSEGV - core dumped) after 6943.521858 seconds from start
+```
+
+To interact with core dump we can use `coredumpctl` utility:
+
+```bash
+coredumpctl list
+
+coredumpctl info 123
+
+coredumpctl gdb 123
+```