linux误删nginx.conf文件恢复方式

ps -ef | grep nginx

root     19812     1  0 7月14 ?       00:00:00 nginx: master process /usr/sbin/nginx
nginx    19813 19812  0 7月14 ?       00:00:26 nginx: worker process
nginx    19814 19812  0 7月14 ?       00:00:33 nginx: worker process
nginx    19815 19812  0 7月14 ?       00:01:15 nginx: worker process
nginx    19816 19812  0 7月14 ?       00:00:55 nginx: worker process
nginx    19817 19812  0 7月14 ?       00:00:04 nginx: cache manager process
root     26171 12446  0 12:56 pts/0    00:00:00 grep --color=auto nginx

yum install gdb -y

cat /proc/19812/maps | grep heap

[root@loghub-server tmp]# cat /proc/19812/maps | grep heap
55e0e6760000-55e0e69c2000 rw-p 00000000 00:00 0                          [heap]

gdb -p 19812

(gdb) dump memory /tmp/nginx-memory 0x55e0e6760000 0x55e0e69c2000

strings  /tmp/nginx-memory > /tmp/nginx-memory.str

grep -A 20 "http {" /tmp/nginx-memory.str

[root@loghub-server tmp]# grep -A 50 "http {" /tmp/nginx-memory.str 
http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;
    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;
    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;
    #proxy_temp_path  /etc/nginx/temp_dir;
    #proxy_cache_path /var/cache/nginx/cache levels=1:2 keys_zone=imgcache:100m inactive=1d max_size=1g;
    #proxy_cache_path /etc/nginx/cache_dir levels=1:2 keys_zone=imgcache:500m max_size=1g inactive=1d use_temp_path=off;
    proxy_cache_path /etc/nginx/conf.d/cache levels=1:2 keys_zone=my_zone:100m inactive=3600s max_size=1g;