Question

我有一个包含两个阶段的docker文件，可在本地成功构建。当我尝试将其推送到heroku的容器服务时，它无法构建，并显示文件不可用的错误。

错误

#include <iostream>
#include <vector>

int main() {
    // coefs before multiplying by powers of A
    std::vector<int> a = {1,2,1};

    // make polynomial coefs vector
    int A = 1;
    const int as = a.size();
    int ap = 1;
    for(int ai = 0; ai<as; ++ai){
        a[ai] *= ap;
        ap *= A;
    }

    std::vector<int> b = {1,3,3,1};
    const int bs = b.size();

    // result vector
    std::vector<int> c(as + bs - 1, 0);

    // multiply vectors
    for(int ai = 0; ai<as; ++ai)
        for(int bi = 0; bi<bs; ++bi){
            c[ai+bi] += a[ai]*b[bi];
        }

    for(int cn: c)
       std::cout << cn << ' ';
    return 0;
}

Dockerfile

** (Mix.Config.LoadError) could not load config config/prod.exs
    ** (ArgumentError) argument error
    :erlang.binary_to_integer("")
    (stdlib) erl_eval.erl:670: :erl_eval.do_apply/6
    (stdlib) erl_eval.erl:878: :erl_eval.expr_list/6
    (stdlib) erl_eval.erl:236: :erl_eval.expr/5

错误发生在第二个FROM bitwalker/alpine-elixir-phoenix:1.5.2 as builder ARG CLOAK_ENCRYPTION_KEY ARG DATABASE_URL ENV MIX_ENV=prod PORT=$PORT DATABASE_URL=$DATABASE_URL CLOAK_ENCRYPTION_KEY=$CLOAK_ENCRYPTION_KEY WORKDIR /app # Cache elixir deps ADD mix.exs mix.lock /app/ RUN mix do deps.get, deps.compile # Same with npm deps ADD client/package.json client/package-lock.json /app/client/ RUN cd client && \ npm install ADD . . # Run frontend build, compile, and digest assets RUN cd /app/client/ && \ npm run build && \ cd /app && \ mix do compile RUN MIX_ENV=prod mix release --env=prod --verbose --no-tar ### Release FROM alpine:3.8 # We need bash and openssl for Phoenix RUN apk upgrade --no-cache && \ apk add --no-cache bash openssl ENV SHELL=/bin/bash COPY --from=builder /app/_build/prod/rel/myapp/app ENTRYPOINT ["/app/bin/myapp"] CMD ["foreground"]

是什么原因导致它在本地运行，但在Heroku上失败了？

Answer 1

弄清楚了。执行heroku push时，我为每个参数都做了一个--arg参数（Docker --build-arg是1到1）。 Heroku实际上只想要一个--arg，所有参数都用逗号连接。

相当于的heroku

docker build -t myapp --build-arg DATABASE_URL=someurl --build-arg CLOAK_ENCRYPTION_KEY=somekey

是

heroku container:push web --arg DATABASE_URL=someurl,CLOAK_ENCRYPTION_KEY=somekey

Heroku Container多阶段构建无法找到文件

1 个答案: