openresty ngx_lua日志操作
日志操作
ngx.log：向日志文件输出日志
语法格式：ngx.log(log_level, ...)环境：init_by_lua*, init_worker_by_lua*, log_by_lua*, ngx.timer.*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, ssl_client_hello_by_lua*, exit_worker_by_lua*
日志级别
ngx.STDERR：错误信息输出到控制台ngx.EMERG：紧急错误ngx.ALERT：警告ngx.CRIT：严重问题ngx.ERR：错误ngx.WARN：告警，一般可以忽略ngx.NOTICE：通知ngx.INFO：打印信息，生产环境一般不使用ngx.DEBUG：调试日志，一般在开发测试的时候使用
error_log 指令
指令格式：error_log path/file level* level可选值：debug、info、notice、warn、error（默认）、crit等* 设置区域：main、http、server、location# 关闭错误日志error_log /dev/null
使用示例
default.conf
server { listen 80; server_name localhost; # 设置错误日志输出级别为debug error_log logs/error.log debug; location / { root /usr/local/openresty/nginx/html; index index.html index.htm; } location /test { content_by_lua_block { ngx.log(ngx.STDERR, "stderr log"); ngx.log(ngx.EMERG, "emerg log"); ngx.log(ngx.ALERT, "alert log"); ngx.log(ngx.CRIT, "crit log"); ngx.log(ngx.ERR, "error log"); ngx.log(ngx.WARN, "warn log"); ngx.log(ngx.NOTICE, "notice log"); ngx.log(ngx.INFO, "info log"); ngx.log(ngx.DEBUG, "debug log"); } } error_page 500 502 503 504 /50x.html; location = /50x.html { root /usr/local/openresty/nginx/html; }}
创建容器
docker run -it -d -p 4006:80 \-v /Users/huli/lua/openresty/log/default.conf:/etc/nginx/conf.d/default.conf \--name open openresty/openresty
使用测试
# 调用/testhuli@hudeMacBook-Pro log % curl localhost:4006/test# 查看日志huli@hudeMacBook-Pro log % docker logs open2022/07/11 05:16:50 [] 7#7: *1 [lua] content_by_lua(default.conf:24):2: stderr log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [emerg] 7#7: *1 [lua] content_by_lua(default.conf:24):3: emerg log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [alert] 7#7: *1 [lua] content_by_lua(default.conf:24):4: alert log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [crit] 7#7: *1 [lua] content_by_lua(default.conf:24):5: crit log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [error] 7#7: *1 [lua] content_by_lua(default.conf:24):6: error log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [warn] 7#7: *1 [lua] content_by_lua(default.conf:24):8: warn log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [notice] 7#7: *1 [lua] content_by_lua(default.conf:24):9: notice log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [info] 7#7: *1 [lua] content_by_lua(default.conf:24):10: info log, client: 172.17.0.1, server: localhost, request: "GET /test HTTP/1.1", host: "localhost:4006"2022/07/11 05:16:50 [debug] 7#7: *1 [lua] content_by_lua(default.conf:24):11: debug log172.17.0.1 - - [11/Jul/2022:05:16:50 +0000] "GET /test HTTP/1.1" 200 5 "-" "curl/7.77.0"2022/07/11 05:16:50 [info] 7#7: *1 client 172.17.0.1 closed keepalive connection