First gzip compression configuration is always disabled

[Danixu]

trafficstars

Hello,

I don't know if I've missmatch any configuration because I'm not able to find anything about this (or maybe I don't know what to search), but when I enable the ngx_pagespeed module on Nginx, the first gzip compression is always disabled and shows a warn message: pagespeed: rollback gzip, explicit configuration ...

I've seen that happens with first configuration, because I've a server with two pages and only the first gets the warning and don't have Gzip compression. When I add the gzip configuracion to main http section then the warning is on nginx.conf file and both webpages have gzip compression enabled.

Greetings!!

[keesspoelstra]

Hi, this should not happen, can you post your nginx.config?

[Lofesa]

If gzip is done by pagespeed, I think is nomal the 1st shot don´t get gziped because pagespeed need more than 1 shot to work, same with all the other filters, 1st time url is not rewrited. I gzip is set in nginx conf then pagespeed disables their own gzip feature because it is explicit set in nginx conf.

[Danixu]

Hello,

The problem is that even after some hits the gzip still disabled, and is disabled on the whole web, not only the processed files.

My nginx.conf is:

user  www-data;
worker_processes auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


load_module "modules/ngx_http_geoip_module.so";
load_module "modules/ngx_pagespeed.so";

events {
    use epoll;
    multi_accept on;
    worker_connections  1024;
}

worker_rlimit_nofile 2048;

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

  # Módulo pagespeed
  pagespeed On;
  pagespeed FileCachePath "/var/cache/ngx_pagespeed/";
  pagespeed EnableFilters combine_css,combine_javascript,convert_jpeg_to_progressive,recompress_images;

  # Activamos gzip para luchar contra la manía del pagespeed de desactivarlo
  gzip on;

    sendfile        on;

    keepalive_timeout  60;

    # DDOS
    client_body_buffer_size 128k;
    large_client_header_buffers 4 256k;
    limit_conn_zone $binary_remote_addr zone=conn_limit_per_ip:10m;
    limit_req_zone $binary_remote_addr zone=req_limit_per_ip:10m rate=50r/s;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*.conf;    
    include /etc/nginx/upstreams-enabled/*.conf;
    include /etc/nginx/maps-enabled/*.conf;
}

and the host conf is:

server {
  server_name _;
  listen 127.0.0.1:80; 
  root /opt/www;
  
  index index.php index.html;
  autoindex off; 

  # Logs
  access_log /var/log/nginx/access.log;
  error_log /var/log/nginx/error.log;

  location ~ robots.txt {
    return 200 "User-agent: *\nDisallow: /";
    add_header Content-Type text/plain;
  }

# Show server host name as header
  add_header X-Backend-Server $hostname;

# Behind proxy
  set_real_ip_from    127.0.0.1;
  real_ip_header      X-Forwarded-For;

  open_file_cache          max=2000 inactive=20s;
  open_file_cache_valid    60s;
  open_file_cache_min_uses 5;
  open_file_cache_errors   off;

  # Compression
  # Enable Gzip compressed.
  gzip on;
  gzip_http_version  1.1;
  gzip_disable        "msie6";
  gzip_min_length    256;
  gzip_proxied       any;
  gzip_vary          on;
  gzip_comp_level    5;

  # Compress all output labeled with one of the following MIME-types.
  gzip_types
    application/atom+xml
    application/javascript
    application/json
    application/rss+xml
    application/vnd.ms-fontobject
    application/x-font-ttf
    application/x-web-app-manifest+json
    application/xhtml+xml
    application/xml
    font/opentype
    image/svg+xml
    image/x-icon
    text/css
    text/plain
    text/x-component;

  server_tokens off;

  # DOS
  limit_conn conn_limit_per_ip 20;
  limit_req zone=req_limit_per_ip burst=50 nodelay;
  limit_conn_status 499;

## Start: Size Limits & Buffer Overflows ##
  client_body_buffer_size  12K;
  client_header_buffer_size 12K;
  # 413 (Request Entity Too Large)
  client_max_body_size 25M;
  # 414 (Request-URI Too Large)
  # 400 (Bad Request)
  large_client_header_buffers 2 12K;
  ## END: Size Limits & Buffer Overflows ##

  ## Start: Timeouts ##
  # 408 (Request Time-out)
  client_body_timeout   10s;
  # 408 (Request Time-out)
  client_header_timeout 10s;
  keepalive_timeout     5s 5;
  send_timeout          10s;
  ## End: Timeouts ##

  ## Start: File Expiration ##
  expires $expires;
  ## End: File Expiration ##

  location / {
    try_files $uri $uri/ /index.php?$args;  # make index.php handle requests for /
  }

  location ~* \.(eot|ttf|woff|woff2)$ {
    try_files $uri $uri/ @proxy;    # look for static files in root directory and ask backend if not successful
    add_header Access-Control-Allow-Origin "*";
    sendfile           on;
    sendfile_max_chunk 1m;
    access_log off;
  }

  location ~*\.(jpeg|jpg|gif|png|css|js|ico|swf|gz|svg|svgz|ttf|otf|woff|woff2|eot|mp4|ogg|ogv|webm|zip)$ {
    try_files $uri $uri/ @proxy;    # look for static files in root directory and ask backend if not successful
    #add_header Access-Control-Allow-Origin "*";
    sendfile           on;
    sendfile_max_chunk 1m;
    access_log off;
  }
  
  location @proxy {
    fastcgi_pass hhvm_backend;      # proxy everything from this location to backend
  }
  
  location ~\.php$ {    try_files $uri =404;      # if reference to php executable is invalid return 404
    fastcgi_read_timeout 600;
    fastcgi_send_timeout 600;
    fastcgi_buffers 8 8k;
    fastcgi_buffer_size 8k;
    fastcgi_intercept_errors on; 
    fastcgi_keep_conn on;       # use persistent connects to backend
    include fastcgi_params;
    fastcgi_param  HTTPS on;
    fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_pass hhvm_backend;
  }
}

With this configuration the nginx.conf gzip is ignored and then the host gzip works. If i comment the nginx.conf gzip entrie then the host gzip entrie is ignored and the whole page is without gzip.

Greetings!!

[Lofesa]

Are you using a proxy? If yes, you need to enable gzip for proxy gzip_proxied any; to enable all proxied responses gziped

here you can read it

[Danixu]

Hello,

I'm unsing the same nginx as proxy (local), and I've already set the gzip_proxied to any. Without the pagespeed module gzip works perfect with same configuration, but just when I enable the module it shows a warning message about gzip and gets disabled.

Greetings!!

[Lofesa]

HI @Danixu When you try to the "real" server at 127.0.0.1:80 bypassing the proxy, the issue still here? What is the server config block? In my case, I don´t use proxy, and had the gzip enaled at http block and all the servers block are gzipied. I always get a pagespeed mesage that gzip is disabled because is explicit enable in nginx conf, like this ......pagespeed: rollback gzip, explicit configuration in..... at start time, but all content become compressed

[joglomedia]

Hi there,

any solution available?

I also facing same issue on my LEMP stack

root@ucsg1:~# tail -f /var/log/nginx/error.log 
2019/09/19 22:15:44 [info] 6265#6265: [ngx_pagespeed 1.13.35.2-0] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.
2019/09/19 22:15:44 [info] 6265#6265: pagespeed: rollback gzip, explicit configuration in /etc/nginx/comp_gzip:2

root@ucsg1:~# nginx -V
nginx version: nginx/1.16.1 (LEMPer)
built by gcc 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1) 
built with OpenSSL 1.1.1c  28 May 2019

[Lofesa]

But you get content no gzipped? Any luck to get a url to test?

[joglomedia]

@Lofesa

yes, i got it gzipped

$ curl -H "Accept-Encoding: gzip" -I https://*****.com/ HTTP/2 200 date: Mon, 23 Sep 2019 06:32:23 GMT content-type: text/html; charset=UTF-8 vary: Accept-Encoding server: LEMPer x-fastcgi-cache: HIT x-page-speed: LEMPer/PageSpeed content-encoding: gzip

Whenever I turn off the Gzip, I still get the gziped results on Pagespeed enabled vhost.

So, this is not an issue, right?

[Lofesa]

2019/09/19 22:15:44 [info] 6265#6265: pagespeed: rollback gzip, explicit configuration in /etc/nginx/comp_gzip:2 This messages is informational, pagespeed disables gzip cause it is enabled in the server.

[joglomedia]

@Lofesa thanks for the clarification :)

[Lofesa]

Hi @joglomedia If you enable compression in pagespeed (is done by gzip) , optimized resources are served w/ gzip compression, but if you enable gzip in the server too, then pagespeed disables compression to avoid optimized resources be double gziped so you get the message saying that pagespeed diabless gzip.