故宮命令是不是在我的NodeJS發現泊塢窗容器

Question

我創建了一個碼頭工人形象：

$ docker build -t stephaneeybert/nodejs . 
Sending build context to Docker daemon 2.56 kB 
Step 1 : FROM debian 
---> 1b088884749b 
Step 2 : RUN apt-get clean && apt-get update 
---> Using cache 
---> b12133d6342f 
Step 3 : RUN apt-get install -y curl 
---> Using cache 
---> 22dfb4882b12 
Step 4 : RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.32.1/install.sh | bash 
---> Using cache 
---> 27f2fac45254 
Step 5 : RUN . ~/.nvm/nvm.sh; nvm install stable 
---> Using cache 
---> 20d99d545755 
Step 6 : RUN . ~/.nvm/nvm.sh; nvm use stable 
---> Using cache 
---> 9ec14efb2407 
Step 7 : RUN . ~/.nvm/nvm.sh; npm install -g npm 
---> Using cache 
---> d264d38565f3 
Step 8 : EXPOSE 9001 
---> Using cache 
---> 29e3589557e1 
Step 9 : ENTRYPOINT /usr/bin/tail -f /dev/null 
---> Using cache 
---> 2ce499300fe1 
Successfully built 2ce499300fe1 

圖像腳本是：

FROM debian 

RUN apt-get clean && apt-get update 
RUN apt-get install -y curl 

# Installing nodesjs 

RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.32.1/install.sh | bash 

RUN . ~/.nvm/nvm.sh; nvm install stable 
RUN . ~/.nvm/nvm.sh; nvm use stable 
RUN . ~/.nvm/nvm.sh; npm install -g npm 

EXPOSE 9001 

ENTRYPOINT ["/usr/bin/tail", "-f", "/dev/null"] 

然後我跑的容器，並打開一個bash shell中：

$ docker run -d -p 127.0.0.1:9001:9001 --name nodejs stephaneeybert/nodejs 
c6dddf0a5eb0f11c897f63910eb01f2868fe0f39a80e5e2a580ef3a82935b27b 
[stephane@stephane-ThinkPad-X301 nodejs] 
$ docker exec -it nodejs bash 
root@c6dddf0a5eb0:/# 

一旦在那裏，我試圖讓版本：

root@c6dddf0a5eb0:/# npm -v 
bash: npm: command not found 

但找不到npm。

當交互shell鍵入命令nvm use stable，它提供以下錯誤：N/A: version "N/A" is not yet installed.

我知道有針對不存在的節點版本的別名。

的nvm ls命令顯示：

root@60446f9286d0:/# nvm ls 
      N/A 
node -> stable (-> N/A) (default) 
iojs -> N/A (default) 

調試器中有這樣一段顯示：

root@60446f9286d0:/# nvm debug 
nvm --version: v0.32.1 
$SHELL: /bin/bash 
$HOME: /root 
$NVM_DIR: '$HOME/.nvm' 
$PREFIX: '' 
$NPM_CONFIG_PREFIX: '' 
nvm current: none 
which node: 
which iojs: 
which npm: 
npm config get prefix: bash: npm: command not found 
npm root -g: bash: npm: command not found 

1 - 爲什麼我需要在每個命令源此腳本. ~/.nvm/nvm.sh;？

2-爲什麼我的Node包管理器在bash shell中找不到？

編輯：我改變了一下Dockerfile文件的內容：

RUN curl -o-https://raw.githubusercontent.com/creationix/nvm/v0.32.1/install.sh | bash \ 
    && . ~/.nvm/nvm.sh \ 
    && nvm install stable \ 
    && nvm alias default stable \ 
    && nvm use default 

現在建設就說明這一點：

Step 4 :RUN curl -o https://raw.githubusercontent.com/creationix/nvm/v0.32.1/install.sh | bash && . ~/.nvm/nvm.sh && nvm install stable && nvm alias default stable && nvm use default 
---> Running in 7d2c404135dd 
    % Total % Received % Xferd Average Speed Time Time  Time Current 
           Dload Upload Total Spent Left Speed 
100 10250 100 10250 0  0 18258  0 --:--:-- --:--:-- --:--:-- 18238 
=> Downloading nvm as script to '/root/.nvm' 

=> Appending source string to /root/.bashrc 
=> Close and reopen your terminal to start using nvm or run the following to use it now: 

export NVM_DIR="/root/.nvm" 
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm 
######################################################################## 100.0% 
Computing checksum with sha256sum 
Checksums matched! 
Now using node v7.2.0 (npm v3.10.9) 
Creating default alias: default -> stable (-> v7.2.0 *) 
default -> stable (-> v7.2.0 *) 
Now using node v7.2.0 (npm v3.10.9) 
---> ad960a4addbe 
Removing intermediate container 7d2c404135dd 
Step 5 : EXPOSE 9001 
---> Running in df9284421302 
---> 14d386f009fb 
Removing intermediate container df9284421302 
Step 6 : ENTRYPOINT /usr/bin/tail -f /dev/null 
---> Running in fa2d71b6dfdf 
---> d02c8e88eb7f 
Removing intermediate container fa2d71b6dfdf 
Successfully built d02c8e88eb7f 

我可以看到它安裝的節點V7.2.0並使用它。

但是，當我登錄到使用命令docker exec -it nodejs bash容器它不會看到任何地方的任何節點：

root@f8f2a32b462a:/# nvm --version 
0.32.1 
root@f8f2a32b462a:/# npm --version 
bash: npm: command not found 
root@f8f2a32b462a:/# echo $NVM_DIR 
/root/.nvm 
root@f8f2a32b462a:/# ls -l /root/.nvm 
total 100 
-rwxr-xr-x 1 root root 313 Nov 26 13:01 nvm-exec 
-rw-r--r-- 1 root root 95660 Nov 26 13:01 nvm.sh 
root@f8f2a32b462a:/# ls -l /root/.npm 
ls: cannot access /root/.npm: No such file or directory 

Answer 1

我改變了我安裝節點的方式，這樣做是沒有nvm工具：

RUN curl -sL https://deb.nodesource.com/setup_7.x | bash 
RUN apt-get install -y nodejs 

現在，在容器登錄時，它可以找到節點可執行文件：

$ docker run -d -p 127.0.0.1:9001:9001 --name nodejs stephaneeybert/nodejs 
f3a2f054934ef92a9b05486b6f6dbe53abd4390826c06d1b7a490d671d8e3422 
[stephane@stephane-ThinkPad-X301 nodejs] 
$ docker exec -it nodejs bash 
root@f3a2f054934e:/# npm --version                           
3.10.9 

也許，當我使用nvm工具時，我應該在客戶端shell中找到npm命令。