我无法让 Munin 动态变焦工作。我很确定问题与 Nginx 配置有关。任何生成缩放图的尝试都会触发 nginx 日志中的以下错误条目：
2015/02/22 13:26:01 [error] 4782#0: *2580 open() "/data/munin/usr/share/munin/cgi/munin-cgi-graph/bellaria/antergos1.bellaria/diskstats_latency/AntergosVG_AntergosRoot-pinpoint=1421756527,1424607727.png" failed (2: No such file or directory), client: 10.10.10.25, server: munin, request: "GET /usr/share/munin/cgi/munin-cgi-graph/bellaria/antergos1.bellaria/diskstats_latency/AntergosVG_AntergosRoot-pinpoint=1421756527,1424607727.png?&lower_limit=&upper_limit=&size_x=800&size_y=400 HTTP/1.1", host: "munin.bellaria", referrer: "http://munin.bellaria/static/dynazoom.html?cgiurl_graph=/usr/share/munin/cgi/munin-cgi-graph&plugin_name=bellaria/antergos1.bellaria/diskstats_latency/AntergosVG_AntergosRoot&size_x=800&size_y=400&start_epoch=1421756527&stop_epoch=1424607727"
具体来说，我怀疑 fastCGI 参数有问题。好心人可以看看我的 Munin 虚拟服务器（见下文）并向我解释有什么问题吗？这让我发疯 - 但我有一种预感，任何专家都会在几分之一秒内确定问题......
# Munin server
server {
listen 80;
server_name munin munin.bellaria;
root /data/munin;
allow all;
access_log logs/munin.access.log;
error_log logs/munin.error.log;
location / {
index index.html index.htm index.php;
}
location ~ \.(php|html|html|cgi)$ {
fastcgi_pass unix:/run/php-fpm/php-fpm.sock;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param AUTH_USER $remote_user;
fastcgi_param REMOTE_USER …