在 docker 中构建镜像时出现以下错误

在 docker 中构建镜像时出现以下错误

在docker中构建镜像时出现以下错误:

 docker build -t demo .

输出 :

Sending build context to Docker daemon  2.048kB
Step 1/3 : From tomcat:8
 ---> 8973f493aa0a
Step 2/3 : MAINTAINER "shweta"
 ---> Using cache
 ---> 4b846800a044
Step 3/3 : COPY ./webapp.war /usr/local/tomcat/webapps

错误 :

COPY failed: stat /var/lib/docker/tmp/docker-builder389027616/webapp.war: no such file o r directory

Docker文件:

# Pull base image
From tomcat:8

# Maintainer
MAINTAINER "shweta"

# copy war file on to container
COPY ./webapp.war /usr/local/tomcat/webapps

答案1

您应该始终docker build从文件所在的目录运行命令webapp.war

.in./webapp.war告诉docker build命令在当前目录中查找文件。

没有webapp.war在当前目录中。

docker build -f Dockerfile .

输出 :

Sending build context to Docker daemon    748kB
Step 1/3 : From tomcat:8
8: Pulling from library/tomcat
092586df9206: Pull complete 
ef599477fae0: Pull complete 
4530c6472b5d: Pull complete 
d34d61487075: Pull complete 
272f46008219: Pull complete 
12ff6ccfe7a6: Pull complete 
f26b99e1adb1: Pull complete 
21bec9c8ea28: Pull complete 
b8a32f28e27c: Pull complete 
94fdd0ba0430: Pull complete 
Digest: sha256:bb4ceffaf5aa2eba6c3ee0db46d863c8b23b263cb547dec0942e757598fd0c24
Status: Downloaded newer image for tomcat:8
 ---> 8973f493aa0a
Step 2/3 : MAINTAINER "shweta"
 ---> Running in f84d33a29144
Removing intermediate container f84d33a29144
 ---> d1823a301759
Step 3/3 : COPY ./webapp.war /usr/local/tomcat/webapps
COPY failed: stat /var/lib/docker/tmp/docker-builder241674033/webapp.war: no such file or directory

webapp.war在当前目录中创建了一个文件:

touch webapp.war

现在运行docker build命令:

docker build -f Dockerfile .

输出 :

Sending build context to Docker daemon  749.1kB
Step 1/3 : From tomcat:8
 ---> 8973f493aa0a
Step 2/3 : MAINTAINER "shweta"
 ---> Using cache
 ---> d1823a301759
Step 3/3 : COPY ./webapp.war /usr/local/tomcat/webapps
 ---> 1f9c0af8b8d3
Successfully built 1f9c0af8b8d3

它建得很好。

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