尝试运行示例 "R on AWS Lambda with Containers"

Question

我正在尝试运行 MDNEUZERLING 创建的在 AWS Lambda 上使用 R 和容器的示例。 https://mdneuzerling.com/post/r-on-aws-lambda-with-containers/#fn:1

但是我在本地尝试运行时收到以下错误。 snip of error

07 Mar 2022 15:06:28,046 [INFO] (rapid) exec '/var/runtime/bootstrap' (cwd=/var/task, handler=)
07 Mar 2022 15:06:37,950 [INFO] (rapid) extensionsDisabledByLayer(/opt/disable-extensions-jwigqn8j) -> stat /opt/disable-extensions-jwigqn8j: no such file or directory
07 Mar 2022 15:06:37,950 [WARNING] (rapid) Cannot list external agents error=open /opt/extensions: no such file or directory
START RequestId: 8968dd09-4b03-4a0c-8260-202ac927ccb2 Version: $LATEST
Fatal error: cannot open file 'runtime.R': No such file or directory
07 Mar 2022 15:06:37,966 [WARNING] (rapid) First fatal error stored in appctx: Runtime.ExitError
07 Mar 2022 15:06:37,966 [WARNING] (rapid) Process 15(bootstrap) exited: Runtime exited with error: exit status 2
07 Mar 2022 15:06:37,966 [ERROR] (rapid) Init failed InvokeID= error=Runtime exited with error: exit status 2
07 Mar 2022 15:06:37,966 [WARNING] (rapid) Reset initiated: ReserveFail
07 Mar 2022 15:06:37,966 [WARNING] (rapid) Cannot list external agents error=open /opt/extensions: no such file or directory
Fatal error: cannot open file 'runtime.R': No such file or directory
07 Mar 2022 15:06:37,982 [WARNING] (rapid) First fatal error stored in appctx: Runtime.ExitError
07 Mar 2022 15:06:37,982 [WARNING] (rapid) Process 30(bootstrap) exited: Runtime exited with error: exit status 2
END RequestId: e7531a2a-1ca7-4975-9841-ff2d0beeeb18
REPORT RequestId: e7531a2a-1ca7-4975-9841-ff2d0beeeb18  Init Duration: 0.23 ms  Duration: 31.98 ms      Billed Duration: 32 ms  Memory Size: 3

单独 shell 中的查询是：

curl -X POST "http://localhost:9000/2015-03-31/functions/function/invocations" -d "{'number': 5}"

我相信我是按照这个例子一步一步来的，但是有些地方做错了。

我的 dockerfile 如下：

FROM public.ecr.aws/lambda/provided:latest

ENV R_VERSION=4.0.3

RUN yum -y install wget

RUN yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm \
  && wget https://cdn.rstudio.com/r/centos-7/pkgs/R-${R_VERSION}-1-1.x86_64.rpm \
  && yum -y install R-${R_VERSION}-1-1.x86_64.rpm \
  && rm R-${R_VERSION}-1-1.x86_64.rpm

ENV PATH="${PATH}:/opt/R/${R_VERSION}/bin/"

# System requirements for R packages
RUN yum -y install openssl-devel

RUN Rscript -e "install.packages(c('httr', 'jsonlite', 'logger'), repos = 'https://cloud.r-project.org/')"

#COPY runtime.R functions.R ${LAMBDA_TASK_ROOT}/

COPY runtime.r ${LAMBDA_TASK_ROOT}/
COPY functions.r ${LAMBDA_TASK_ROOT}/
RUN chmod 755 -R ${LAMBDA_TASK_ROOT}/

RUN printf '#!/bin/sh\ncd $LAMBDA_TASK_ROOT\nRscript runtime.R' > /var/runtime/bootstrap \
  && chmod +x /var/runtime/bootstrap

和functions.r文件如下：

#' Determine if the given integer is even or odd
#'
#' @param number Integer
#'
#' @return "even" or "odd"
#' @export
#'
#' @examples
#' parity(3) # odd
#' parity(4) # even
parity <- function(number) {
  list(parity = if (as.integer(number) %% 2 == 0) "even" else "odd")
}

#' A nullary function that returns the current version of R
#'
#' @return character
#' @export
#'
#' @examples
#' hello()
hello <- function() {
  list(response = paste("Hello from", version$version.string))
}

和 'runtime.R' 等同于：

https://github.com/mdneuzerling/r-on-lambda/blob/main/runtime.R

这是我第一次在这里提问，因此非常感谢您的反馈。我也坚持了几天，试图找出没有运气的问题。设法测试了一个工作正常的 python 示例，但确实需要使其与 R 一起工作。

Answer 1

问题出在 docker 文件中。在下面几行

COPY runtime.r ${LAMBDA_TASK_ROOT}/

COPY functions.r ${LAMBDA_TASK_ROOT}/

在原始文件中，这是按如下方式完成的，

COPY runtime.R functions.R ${LAMBDA_TASK_ROOT}/

这给了我一个错误，因此为每个要复制的文件制作了一行，但错误地将文件扩展名设置为小写，这造成了问题，因为 AWS 提供的图像正在寻找带有大写 R 扩展名的文件（我猜是这个），因为文件是用小写扩展名 '.r' 保存的。

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