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[英]how to rsync from a host computer to docker container using docker cp
[英]How to copy multiple files from container to host using docker cp
我想使用通配符从容器中的目录中选择多个文件,并使用 docker cp 将这些文件从容器复制到 docker 主机。
我找不到 docker cp 是否支持使用通配符。
docker cp fd87af99b650:/foo/metrics.csv* /root/metrices_testing/
这导致错误metrics.csv*: no such file or directory
我遇到了一个示例,其中for loop
用于选择几个文件然后发送到容器,但我想将文件从容器传输到主机,并希望在 docker 主机上执行此操作,因为脚本仅在主机上运行。
首先使用 docker exec 选择文件,然后使用 docker cp 复制它们是一种选择。 但这是一个 2 步过程。
有人可以帮我一步做到这一点吗?
编辑:
我试过这个。 一步接近,但仍然失败。
# for f in $(docker exec -it SPSRS bash -c "ls /opt/tpa/logs/metrics.csv*");
do docker cp SPSRS:$f /root/metrices_testing/;
done
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-08:45
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-09:00
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-09:15
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-09:30
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-09:45
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-10:00
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-10:15
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-10:30
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-10:45
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-11:00
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-11:15
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-11:30
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-11:45
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-12:00
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-12:15
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-12:30
: no such file or directory lstat /docker/overlay2/193d2ad0d8d087377e3b96cbfb672b0e39132ae5e961872127614c9396f8c068/merged/opt/SPS_18_5_R1/logs/metrics.csv.2018.07.10-12:45
事实上,你的解决方案可以让你的目标只需要一点点改变:
for f in $(docker exec -it SPSRS bash -c "ls /opt/tpa/logs/metrics.csv*"); do docker cp SPSRS:$f /root/metrices_testing/; done
->
for f in $(docker exec -it SPSRS bash -c "ls /opt/tpa/logs/metrics.csv*"); do docker cp SPSRS:`echo $f | sed 's/\r//g'` /root/metrices_testing/; done
这是因为docker exec -it SPSRS bash -c "ls /opt/tpa/logs/metrics.csv*"
在每个匹配的字符串中都会有\\r
,所以最终cp
找不到容器中的文件。
所以,我们使用echo $f | sed 's/\\r//g'
echo $f | sed 's/\\r//g'
为每个文件名去掉\\r
,这可以让你工作。
Docker cp 命令支持复制文件夹中的所有内容
docker cp -a container-id:/opt/tpa/logs/ /root/testing/
在上面的示例中,将文件从容器文件夹 /opt/tpa/logs 复制到本地机器 /root/testing/ 文件夹。 这里 /logs/ 中的所有文件都将被复制到本地。 这里的技巧是使用-a选项和docker cp
Docker cp 仍然不支持通配符。 但是,您可以通过以下方式在 Dockerfile 中使用它们:
COPY hom* /mydir/ # adds all files starting with "hom"
COPY hom?.txt /mydir/ # ? is replaced with any single character, e.g., "home.txt"
参考: https : //docs.docker.com/engine/reference/builder/#copy
在容器内运行:
dcp() {
if [ "$#" -eq 1 ]; then
printf "docker cp %q .\n" "$(hostname):$(readlink -e "$1")"
else
local archive="$(mktemp -t "export-XXXXX.tgz")"
tar czf "$archive" "$@" --checkpoint=.52428800
printf "docker exec %q cat %q | tar xvz -C .\n" "$(hostname)" "$archive"
fi
}
然后选择要复制的文件:
dcp /foo/metrics.csv*
它将在容器内创建一个存档并输出一个命令供您运行。 在主机上运行该命令。
例如
docker exec 1c75ed99fa42 cat /tmp/export-x9hg6.tgz | tar xvz -C .
或者,我想你可以在没有临时存档的情况下做到这一点:
dcp() {
if [ "$#" -eq 1 ]; then
printf "docker cp %q .\n" "$(hostname):$(readlink -e "$1")"
else
printf "docker exec %q tar czC %q" "$(hostname)" "$PWD"
printf " %q" "$@"
printf " | tar xzvC .\n"
fi
}
将为您生成一个命令,例如:
docker exec 1c75ed99fa42 tar czC /root .cache .zcompdump .zinit .zshrc .zshrc.d foo\ bar | tar xzvC .
你甚至不需要别名,这只是一个方便。
docker cp
接受文件或 tar 存档,因此您可以将作为参数提供的文件列表打包到 tar 存档, 将存档返回到 stdout并通过管道传输到docker cp
。
#!/bin/bash
if [[ "$#" -lt 2 || "$1" == "-h" || "$1" == "--help" ]]; then
printf "Copy files to docker container directory.\n\n"
echo "Usage: $(basename $0) files... container:directory"
exit 0
fi
SOURCE="${*%${!#}}"
TARGET="${@:$#}"
tar cf - $SOURCE | docker cp - $TARGET
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