카타코더 Docker - Ignoring Files During Build

2 Docker Ignore

2.1 Example

$ ll
total 20
drwxr-xr-x 1 scrapbook scrapbook 4096 Mar 23 02:22 ./
drwxr-xr-x 1 scrapbook scrapbook 4096 Jul  2  2018 ../
-rw-r--r-- 1 root      root        71 Mar 23 02:22 Dockerfile
-rwxr-xr-x 1 root      root        19 Mar 23 02:22 cmd.sh*
-rw-r--r-- 1 root      root        12 Mar 23 02:22 passwords.txt

$ cat passwords.txt
admin:admin

$ cat Dockerfile
FROM alpine
ADD . /app
COPY cmd.sh /cmd.sh
CMD ["sh", "-c", "/cmd.sh"]

$ docker build -t password .
Sending build context to Docker daemon  4.096kB
Step 1/4 : FROM alpine
 ---> 11cd0b38bc3c
Step 2/4 : ADD . /app
 ---> d31fbaa6996a
Step 3/4 : COPY cmd.sh /cmd.sh
docker run password ls /app
 ---> e5c5d68e59d5
Step 4/4 : CMD ["sh", "-c", "/cmd.sh"]
 ---> Running in a603c7518ea3
Removing intermediate container a603c7518ea3
 ---> 7dfcee3eff6e
Successfully built 7dfcee3eff6e
Successfully tagged password:latest

$ docker run password ls /app
Dockerfile
cmd.sh
passwords.txt

2.2 Ignore File

$ echo passwords.txt >> .dockerignore
$ cat .dockerignore
passwords.txt

$ docker build -t nopassword .
Sending build context to Docker daemon  4.096kB
Step 1/4 : FROM alpine
 ---> 11cd0b38bc3c
Step 2/4 : ADD . /app
 ---> 84b3f01f9053
Step 3/4 : COPY cmd.sh /cmd.sh
 ---> 14d22649464f
Step 4/4 : CMD ["sh", "-c", "/cmd.sh"]
 ---> Running in fb2ebff22d16
Removing intermediate container fb2ebff22d16
 ---> 3ce325bc0f4d
Successfully built 3ce325bc0f4d
Successfully tagged nopassword:latest

$ docker run nopassword ls /app
Dockerfile
cmd.sh