试着创建一个docker image, 不在乎实用性和功能，只是对docker 创建image 有个大概的了解，所以有此文章。
文章目录
- step1. 创建文件夹
- step2. 进入文件夹
- step3. 创建Dockerfile
- step4. 构建镜像
step1. 创建文件夹
mkdir busybox
step2. 进入文件夹
cd busybox
step3. 创建Dockerfile
vim Dockerfile, 写入以下内容
FROM busybox:latest
LABEL tester docker_user<docker_user@email.com>
RUN echo 'hello docker'
step4. 构建镜像
docker build -t docker_test -t busybox_test:1.0.0 /app/busybox
输出内容：
[root@localhost busybox]# docker build -t docker_test -t busybox_test:1.0.0 /app/busybox
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM busybox:latest
latest: Pulling from library/busybox
ea97eb0eb3ec: Pull complete
Digest: sha256:bde48e1751173b709090c2539fdf12d6ba64e88ec7a4301591227ce925f3c678
Status: Downloaded newer image for busybox:latest---> 219ee5171f80
Step 2/3 : LABEL tester docker_user<docker_user@email.com>---> Running in 94f14af4ef3f
Removing intermediate container 94f14af4ef3f---> 9028fef7e34b
Step 3/3 : RUN echo 'hello docker'---> Running in aaed8574d213
hello docker
Removing intermediate container aaed8574d213---> 754228d7562e
Successfully built 754228d7562e
Successfully tagged docker_test:latest
Successfully tagged busybox_test:1.0.0
可以看到输出了 hello docker
查看我们创建的镜像
[root@localhost busybox]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox_test 1.0.0 754228d7562e 49 seconds ago 1.23MB
docker_test latest 754228d7562e 49 seconds ago 1.23MB
goharbor/chartmuseum-photon v2.1.2 957cad6ee4f4 2 weeks ago 172MB
goharbor/redis-photon v2.1.2 ab361cc80013 2 weeks ago 68.8MB
goharbor/trivy-adapter-photon v2.1.2 396c0a289a68 2 weeks ago 106MB
goharbor/clair-adapter-photon v2.1.2 b43551e703c2 2 weeks ago 58MB
goharbor/clair-photon v2.1.2 0e9f86b78780 2 weeks ago 168MB
goharbor/notary-server-photon v2.1.2 ca212469d8d7 2 weeks ago 104MB
goharbor/notary-signer-photon v2.1.2 cf87adab9022 2 weeks ago 101MB
goharbor/harbor-registryctl v2.1.2 da26ae6a8d51 2 weeks ago 132MB
goharbor/registry-photon v2.1.2 417d60a20a94 2 weeks ago 80.1MB
goharbor/nginx-photon v2.1.2 f9ea32db995f 2 weeks ago 40.1MB
goharbor/harbor-log v2.1.2 7514c453345e 2 weeks ago 106MB
goharbor/harbor-jobservice v2.1.2 123382c0d590 2 weeks ago 169MB
goharbor/harbor-core v2.1.2 46211d9a0f44 2 weeks ago 150MB
goharbor/harbor-portal v2.1.2 6eedd3daad4c 2 weeks ago 49.5MB
goharbor/harbor-db v2.1.2 f0c14faef5d5 2 weeks ago 172MB
goharbor/prepare v2.1.2 cc5f5219b08b 2 weeks ago 161MB
busybox latest 219ee5171f80 3 weeks ago 1.23MB
[root@localhost busybox]#
