Question

我正在尝试反向代理一个websocket，我之前用nginx做过没有问题。奇怪的是，我似乎无法通过如此简单的事情重新创造我之前的成功。我一直在配置文件上，但似乎无法找到我的错误。

这是我的完整$ clang++ -stdlib=libc++ -v ohhello.cpp FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) Target: x86_64-unknown-freebsd11.0 Thread model: posix InstalledDir: /usr/bin "/usr/bin/clang++" -cc1 -triple x86_64-unknown-freebsd11.0 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name ohhello.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -v -dwarf-column-info -debugger-tuning=gdb -resource-dir /usr/bin/../lib/clang/3.8.0 -internal-isystem /usr/include/c++/v1 -fdeprecated-macro -fdebug-compilation-dir /usr/home/mike/projects/ohhello -ferror-limit 19 -fmessage-length 80 -fobjc-runtime=gnustep -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/ohhello-050a75.o -x c++ ohhello.cpp clang -cc1 version 3.8.0 based upon LLVM 3.8.0 default target x86_64-unknown-freebsd11.0 #include "..." search starts here: #include <...> search starts here: /usr/include/c++/v1 /usr/bin/../lib/clang/3.8.0/include /usr/include End of search list. "/usr/bin/ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1 --hash-style=both --enable-new-dtags -o a.out /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/lib /tmp/ohhello-050a75.o -lc++ -lm -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o：

default.conf

我得到的错误：

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

server {
  listen 80;

  location /api/ {
    proxy_pass ${API_LOCATION};
  }

  location / {
    proxy_pass ${UI_LOCATION};
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
  }
}

我正在使用的确切Dockerfile，以防你想要复制我的设置（相对于Dockerfile保存2016/10/10 23:30:24 [emerg] 8#8: invalid number of arguments in "map" directive in /etc/nginx/conf.d/default.conf:1 nginx: [emerg] invalid number of arguments in "map" directive in /etc/nginx/conf.d/default.conf:1为default.conf：

conf.templates/default.conf

Answer 1

envsubst命令会替换所有$vars，包括$http_upgrade和$connection_upgrade。您应该提供要替换的变量列表，例如：

 envsubst '${API_LOCATION},${UI_LOCATION}' < /etc/nginx/conf.templates/default.conf

另请参阅：Replacing only specific variables with envsubst

此外，在docker-compose配置中，您应该使用双$$转义来禁用变量替换：

FROM nginx
COPY conf /etc/nginx/conf.templates
CMD /bin/bash -c "envsubst '$${API_LOCATION},$${UI_LOCATION}' < /etc/nginx/conf.templates/default.conf > /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'"

nginx'“map”指令中的参数数量无效

1 个答案: