Release does not work with Alpine docker image

[etsangsplk]

Looks lie all the release is built with Ubuntu and the associated dev packages. This casues a lot of issue loading that in alpine. There are suggestion of installtion lib-compat but it will error out on standard c library symbol on function call.

.
[emerg] dlopen() "/usr/local/openresty/nginx/modules/ngx_http_opentracing_module.so" failed (Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /usr/local/openresty/nginx/modules/ngx_http_opentracing_module.so))

[EduardoAC]

@etsangsplk you can add libc6-compat to solve the problem. However, I couldn't solve the next one where it's required __sprintf_chk, which in theory must be solve by adding glibc.

However, the both libraries conflict and it's not an easy way to install the second one. I got stuck at this point to try to find a better solution

[etsangsplk]

@EduardoAC I alresdy tried the libc approach and was stuck with the same.

[EduardoAC]

Me too, that's why I am waiting for ideas from the community

[Yaytay]

Dockerfile-nginx-alpine.txt
I spent a couple of hours yesterday converting the Dockerfile into one based on Alpine (only using Zipkin 'cos that's all I needed, but should be easy enough to modify for others).
It seems to work OK.

I can't offer to support it because I think I'm actually going to want to base off OpenResty.

I've attached the Dockerfile if anyone is interested.

[KhadijaAmmar]

Dockerfile-nginx-alpine.txt
I spent a couple of hours yesterday converting the Dockerfile into one based on Alpine (only using Zipkin 'cos that's all I needed, but should be easy enough to modify for others).
It seems to work OK.

I can't offer to support it because I think I'm actually going to want to base off OpenResty.

I've attached the Dockerfile if anyone is interested.

Thank you for providing this docker file showing how to install plugins,
However, I don't get why you use ln -s and create symoble links?

     ln -s /usr/local/lib/libopentracing.so.1.5.1 /usr/local/lib/libopentracing.so.1  && \
     ln -s /usr/local/lib/libopentracing.so.1 /usr/local/lib/libopentracing.so && \
     ln -s /usr/local/lib/libzipkin.so.0.5.2 /usr/local/lib/libzipkin.so.0 && \
     ln -s /usr/local/lib/libzipkin.so.0 /usr/local/lib/libzipkin.so && \
     ln -s /usr/local/lib/libzipkin_opentracing.so.0.5.2 /usr/local/lib/libzipkin_opentracing.so.0 && \
     ln -s /usr/local/lib/libzipkin_opentracing.so.0 /usr/local/lib/libzipkin_opentracing.so```

Actually, I am trying to do the same with DataDog and that doesn't seems to work for now.

[acj]

For anyone trying to use Datadog APM on Alpine, below is a sample Dockerfile loosely based on Yaytay's solution (thanks!). It should be straightforward to use with the nginx:*-alpine base images if you don't need to build nginx from source.

I followed Datadog's official directions for setting up nginx.conf. If memory serves, the only modification was to the shared object path:

opentracing_load_tracer /usr/local/lib64/libdd_opentracing.so /etc/dd-config.json;

Dockerfile

FROM alpine:3.10

WORKDIR /usr/src/app

ENV NGINX_VERSION="1.14.2"
ENV NGINX_OPENTRACING_VERSION="v0.9.0"
ENV NGINX_OPENTRACING_CPP_VERSION="v1.5.1"
ENV DATADOG_OPENTRACING_VERSION="v1.1.1"
ENV ZIPKIN_OPENTRACING_VERSION="v0.5.2"

ENV MAKEFLAGS="-j4"

RUN apk --update add tar build-base gcompat linux-headers pcre-dev zlib-dev gettext openssl-dev git cmake curl curl-dev msgpack-c-dev

RUN mkdir -p /usr/local/nginx/modules && \
    mkdir nginx && wget -q -O - http://nginx.org/download/nginx-1.14.2.tar.gz | tar xz -C nginx --strip-components=1 -f -

RUN cd /usr/src/app && \
    git clone -b $NGINX_OPENTRACING_CPP_VERSION https://github.com/opentracing/opentracing-cpp.git && \
    cd opentracing-cpp && \
    mkdir .build && cd .build && \
    cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF .. && \
    make && make install
RUN cd /usr/src/app && \
    git clone -b $DATADOG_OPENTRACING_VERSION https://github.com/DataDog/dd-opentracing-cpp && \
    cd dd-opentracing-cpp && \
    mkdir .build && cd .build && \
    cmake .. && \
    make && make install
RUN cd /usr/src/app && \
    git clone -b $ZIPKIN_OPENTRACING_VERSION https://github.com/rnburn/zipkin-cpp-opentracing.git && \
    cd zipkin-cpp-opentracing && \
    mkdir .build && cd .build && \
    cmake -DBUILD_SHARED_LIBS=1 -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF .. && \
    make && make install
RUN cd /usr/src/app && \
    git clone https://github.com/opentracing-contrib/nginx-opentracing.git

RUN cd /usr/src/app/nginx && \
    ./configure \
        --sbin-path=/usr/sbin/nginx \
        --conf-path=/usr/src/app/nginx.conf \
        --with-file-aio \
        --with-threads \
        --with-cc-opt="-O2" \
        --with-http_ssl_module \
        --with-compat \
        --add-dynamic-module=/usr/src/app/nginx-opentracing/opentracing && \
    make && make install

I'm still hoping to find a solution that uses the official releases from this repo, though, because building from source is slow and tends to be a maintenance headache. Will report back if I have any luck with it.

[Sund3]

I managed to do with the jaeger client but only for version 0.4.2

[liuzheng]

RUN apk add gcompat

will solve this issue

I use this, will solve some lib issue

RUN apk add --no-cache --virtual .build-deps \
     gcompat libgcc libstdc++ pcre

but I have another problem

nginx: [error] Failed to load tracing library /usr/local/lib/libjaegertracing_plugin.so: Error relocating /usr/local/lib/libjaegertracing_plugin.so: __strftime_l: symbol not found

still finding solution

[liuzheng]

rebuild the jaeger-client-cpp with version 0.6.0 solved nginx error

[lucacome]

We're now building Docker images for Alpine, does that help?