我需要在预先配置的redis服务器上游和动态IP：6379之间切换自定义标头以进行测试。当前配置示例：
upstream backend_cluster {
server aaa.bbb.ccc.ddd:6379 fail_timeout=0 max_fails=0;
server aaa.bbb.ccc.ddd:6380 fail_timeout=0 max_fails=0;
server aaa.bbb.ccc.ddd:6381 fail_timeout=0 max_fails=0;
server aaa.bbb.ccc.ddd:6382 fail_timeout=0 max_fails=0;
keepalive 16;
}
map $http_BackendIP $backend_upstream {
default "backend_cluster";
"~^([0-9]{1,3}[\.]){3}[0-9]{1,3}+" "$BackendIP";
}
server {
listen 80 default_server;
server_name _;
set $BackendIP "${http_BackendIP}:6379";
location = /test {
........
content_by_lua_block {
local redis = require "resty.redis"
local red = redis:new()
red:set_timeout(1000)
local ok, err = red:connect(ngx.var.backend_upstream)
if not ok then
ngx.log(ngx.ERR, "failed to connect: ", err)
return
end
ok, err = red:rpush(ngx.var.redis_key, ngx.var.query)
if not ok then
ngx.log(ngx.ERR, "rpush error: ", err)
return
end
}
}
}
如果我将自定义标头设置为
，此配置成功将数据推送到redis，电话号码是123.456.789.0：6379 "BackendIP: 123.456.789.0"
但没有BackendIP标头，它无法理解nginx上游错误：
** failed to connect: backend_cluster could not be resolved (3: Host not found) **
我可以以某种方式让那件事按预期工作吗？先谢谢，同志们。