我正在使用Dockerfile构建一个elasticsearch图像：
FROM alpine:latest
RUN apk update
&& apk upgrade
&& apk add curl wget bash openssl openjdk8
&& rm -rf /var/cache/apk/*
WORKDIR /root/
RUN wget -e use_proxy=yes https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.1.tar.gz -O elasticsearch-6.1.1.tar.gz
RUN tar -xf elasticsearch-6.1.*.tar.gz -C /usr/local/
&& mv /usr/local/elasticsearch-6.1* /usr/local/elasticsearch
&& mkdir /usr/local/elasticsearch/logs
&& mkdir /usr/local/elasticsearch/data
&& echo '-Xms512m' > /usr/local/elasticsearch/config/jvm.options
&& echo '-Xmx512m' >> /usr/local/elasticsearch/config/jvm.options
&& adduser -D -u 1000 -h /usr/local/elasticsearch elasticsearch
&& chown -R elasticsearch /usr/local/elasticsearch
USER elasticsearch
CMD ["/usr/local/elasticsearch/bin/elasticsearch", "-Ecluster.name=es-cluster", "-Enode.name=${HOSTNAME}", "-Epath.data=/usr/local/elasticsearch/data", "-Epath.logs=/usr/local/elasticsearch/logs", "-Enetwork.host=0.0.0.0", "-Ediscovery.zen.ping.unicast.hosts=es-master", "-Expack.security.enabled=false", "-Expack.monitoring.enabled=false"]
然后我建造它
docker build -t 'es:6.1' .
我标记它并将其推送到注册表：
docker login
docker tag es:6.1 <username>/es:6.1
docker push <username>es:6.1
这很好用，但是当我对Dockerfile进行更改并再次执行整个过程(不更改标签)时，我得到：
docker push <user>/es:6.1
The push refers to repository [docker.io/<user>/es]
1db25bdc763a: Layer already exists
3bf058fc2f20: Layer already exists
5570ea7cd957: Layer already exists
cd7100a72410: Layer already exists
6.1: digest: sha256:f55a86abbb2593299985d0c0a5de8be69eb0b056d664b0e7d020e63fae0d7d82 size: 1164
这似乎表明图像没有更新...
我错过了什么？这似乎是 Docker 工作流程中一个非常基本的操作......
编辑：
在本地和远程删除所有图像后，我再次进行了构建：
docker build -t 'es:latest' .
我知道使用最新标签，因为它更接近我的用例
这是输出
docker build -t es:latest .
Sending build context to Docker daemon 1.051MB
Step 1/12 : FROM alpine:latest
---> 3fd9065eaf02
Step 2/12 : ENV http_proxy=http://10.xxx.xxx.65:8080
---> Running in 5d2583ff56e2
Removing intermediate container 5d2583ff56e2
---> d4a09d1a4034
Step 3/12 : ENV https_proxy=http://10.xxx.xxx.65:8080
---> Running in 785bb47b903e
Removing intermediate container 785bb47b903e
---> 3412535b08f9
Step 4/12 : ENV HTTP_PROXY=http://10.xxx.xxx.65:8080
---> Running in ed77d05a070c
Removing intermediate container ed77d05a070c
---> b7e5304c4f6b
Step 5/12 : ENV HTTPS_PROXY=http://10.xxx.xxx.65:8080
---> Running in 197eb0ba578f
Removing intermediate container 197eb0ba578f
---> 3609a88fead7
Step 6/12 : RUN apk update && apk upgrade && apk add curl wget bash openssl openjdk8 && rm -rf /var/cache/apk/*
---> Running in fe0a8813e122
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-50-gc8da5122a4 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-49-g06d6ae04c3 [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]
OK: 9044 distinct packages available
OK: 4 MiB in 11 packages
(1/53) Installing pkgconf (1.3.10-r0)
(2/53) Installing ncurses-terminfo-base (6.0_p20170930-r0)
(49/53) Installing openjdk8 (8.151.12-r0)
(50/53) Installing libcrypto1.0 (1.0.2n-r0)
(51/53) Installing libssl1.0 (1.0.2n-r0)
(52/53) Installing openssl (1.0.2n-r0)
(53/53) Installing wget (1.19.2-r1)
Executing busybox-1.27.2-r7.trigger
Executing ca-certificates-20171114-r0.trigger
Executing java-common-0.1-r0.trigger
OK: 113 MiB in 64 packages
Removing intermediate container fe0a8813e122
---> 7cb92f7437a6
Step 7/12 : WORKDIR /root/
Removing intermediate container e550c56108de
---> 585c1062a9b0
Step 8/12 : RUN wget -e use_proxy=yes https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.1.tar.gz -O elasticsearch-6.1.1.tar.gz
---> Running in 3b744a9cc35f
--2018-01-10 14:45:51-- https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.1.tar.gz
Connecting to 10.31.255.65:8080... connected.
Proxy request sent, awaiting response... 200 OK
Length: 28462503 (27M) [application/x-gzip]
Saving to: 'elasticsearch-6.1.1.tar.gz'
0K .......... .......... .......... .......... .......... 0% 135K 3m26s
50K .......... .......... .......... .......... .......... 0% 178K 3m0s
100K .......... .......... .......... .......... .......... 0% 272K 2m34s
150K .......... .......... .......... .......... .......... 0% 530K 2m8s
200K .......... .......... .......... .......... .......... 0% 528K 1m53s
250K .......... .......... .......... .......... .......... 1% 557K 1m42s
300K .......... .......... .......... .......... .......... 1% 10.6M 88s
350K .......... .......... .......... .......... .......... 1% 538K 83s
400K .......... .......... .......... .......... .......... 1% 545K 79s
27650K .......... .......... .......... .......... .......... 99% 5.24M 0s
27700K .......... .......... .......... .......... .......... 99% 645K 0s
27750K .......... .......... .......... .......... ..... 100% 6.80M=22s
2018-01-10 14:46:13 (1.25 MB/s) - 'elasticsearch-6.1.1.tar.gz' saved [28462503/28462503]
Removing intermediate container 3b744a9cc35f
---> 6f987b31a830
Step 9/12 : RUN tar -xf elasticsearch-6.1.*.tar.gz -C /usr/local/ && mv /usr/local/elasticsearch-6.1* /usr/local/elasticsearch && mkdir /usr/local/elasticsearch/logs && mkdir /usr/local/elasticsearch/data && echo '-Xms512m' > /usr/local/elasticsearch/config/jvm.options && echo '-Xmx512m' >> /usr/local/elasticsearch/config/jvm.options && adduser -D -u 1000 -h /usr/local/elasticsearch elasticsearch && chown -R elasticsearch /usr/local/elasticsearch
---> Running in d8ee61eb83ab
Removing intermediate container d8ee61eb83ab
---> 6aa4b9c19b82
Step 10/12 : USER root
---> Running in 46ffe8e22d78
Removing intermediate container 46ffe8e22d78
---> c6f71d927725
Step 11/12 : CMD ["/usr/local/elasticsearch/bin/elasticsearch", "-Ecluster.name=es-cluster", "-Enode.name=${HOSTNAME}", "-Epath.data=/usr/local/elasticsearch/data", "-Epath.logs=/usr/local/elasticsearch/logs", "-Enetwork.host=0.0.0.0", "-Ediscovery.zen.ping.unicast.hosts=es-master", "-Expack.security.enabled=false", "-Expack.monitoring.enabled=false"]
---> Running in 65240d2a060a
Removing intermediate container 65240d2a060a
---> 90b6c90b1451
Step 12/12 : EXPOSE 9200 9300
---> Running in 1aa75c0dfcef
Removing intermediate container 1aa75c0dfcef
---> 7ad4b97d341f
Successfully built 7ad4b97d341f
Successfully tagged es:latest
现在我有一个图像：
es latest 7ad4b97d341f 2 minutes ago 171MB
我标记它并将其推送到注册表：
docker tag es:latest <username>/es:latest
docker push <username>es:latest
在这里，我可以看到实际推动。
docker push xoco70/es:latest
The push refers to repository [docker.io/xoco70/es]
0a7ea1f8eaee: Pushed
a9a17f2ab87e: Pushed
b574c33babc4: Pushed
cd7100a72410: Layer already exists
latest: digest: sha256:e73b618862362f8df013b7806317142fef4384a64066f0488d59c778349590ab size: 1164
现在我有 2 张图像，es 和 xoco70/es
现在第二部分，我只是在Dockerfile上将用户从root更改为弹性搜索
我再做一次：
docker build -t es:latest .
Sending build context to Docker daemon 1.051MB
Step 1/12 : FROM alpine:latest
---> 3fd9065eaf02
Step 2/12 : ENV http_proxy=http://10.31.255.65:8080
---> Using cache
---> d4a09d1a4034
Step 3/12 : ENV https_proxy=http://10.31.255.65:8080
---> Using cache
---> 3412535b08f9
Step 4/12 : ENV HTTP_PROXY=http://10.31.255.65:8080
---> Using cache
---> b7e5304c4f6b
Step 5/12 : ENV HTTPS_PROXY=http://10.31.255.65:8080
---> Using cache
---> 3609a88fead7
Step 6/12 : RUN apk update && apk upgrade && apk add curl wget bash openssl openjdk8 && rm -rf /var/cache/apk/*
---> Using cache
---> 7cb92f7437a6
Step 7/12 : WORKDIR /root/
---> Using cache
---> 585c1062a9b0
Step 8/12 : RUN wget -e use_proxy=yes https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.1.tar.gz -O elasticsearch-6.1.1.tar.gz
---> Using cache
---> 6f987b31a830
Step 9/12 : RUN tar -xf elasticsearch-6.1.*.tar.gz -C /usr/local/ && mv /usr/local/elasticsearch-6.1* /usr/local/elasticsearch && mkdir /usr/local/elasticsearch/logs && mkdir /usr/local/elasticsearch/data && echo '-Xms512m' > /usr/local/elasticsearch/config/jvm.options && echo '-Xmx512m' >> /usr/local/elasticsearch/config/jvm.options && adduser -D -u 1000 -h /usr/local/elasticsearch elasticsearch && chown -R elasticsearch /usr/local/elasticsearch
---> Using cache
---> 6aa4b9c19b82
Step 10/12 : USER elasticsearch
---> Running in dbed466ac2de
Removing intermediate container dbed466ac2de
---> 461798559927
Step 11/12 : CMD ["/usr/local/elasticsearch/bin/elasticsearch", "-Ecluster.name=es-cluster", "-Enode.name=${HOSTNAME}", "-Epath.data=/usr/local/elasticsearch/data", "-Epath.logs=/usr/local/elasticsearch/logs", "-Enetwork.host=0.0.0.0", "-Ediscovery.zen.ping.unicast.hosts=es-master", "-Expack.security.enabled=false", "-Expack.monitoring.enabled=false"]
---> Running in 553c6fc0e646
Removing intermediate container 553c6fc0e646
---> a78743b5e61f
Step 12/12 : EXPOSE 9200 9300
---> Running in 505c3dfd09f0
Removing intermediate container 505c3dfd09f0
---> 6c318f659633
Successfully built 6c318f659633
Successfully tagged es:latest
我标记，并推送
docker tag es:latest xoco70/es:latest
docker push xoco70/es:latest
The push refers to repository [docker.io/xoco70/es]
0a7ea1f8eaee: Layer already exists
a9a17f2ab87e: Layer already exists
b574c33babc4: Layer already exists
cd7100a72410: Layer already exists
latest: digest: sha256:c76d5a0be0160832a198ca591a36f993b68222278a05085b8dd0dfacd27ca3fa size: 1164
当我检查码头工人历史记录时：
sudo docker pull xoco70/es
Using default tag: latest
latest: Pulling from xoco70/es
Digest: sha256:c76d5a0be0160832a198ca591a36f993b68222278a05085b8dd0dfacd27ca3fa
Status: Image is up to date for xoco70/es:latest
NT
sha256:6c318f65963364ad5266218122883f5a11cb36fa62cf9b3715c8774de866b030 3 minutes ago /bin/sh -c #(nop) EXPOSE 9200 9300 0B
sha256:a78743b5e61f29d3562cfc9db85e6c3d4b7f8c05314e223c75e4638cc61f834a 3 minutes ago /bin/sh -c #(nop) CMD ["/usr/local/elasticsearch/bin/elasticsearch" "-Ecluster.name=es-cluster" "-Enode.name=${HOSTNAME}" "-Epath.data=/usr/local/elasticsearch/data" "-Epath.logs=/usr/local/elasticsearch/logs" "-Enetwork.host=0.0.0.0" "-Ediscovery.zen.ping.unicast.hosts=es-master" "-Expack.security.enabled=false" "-Expack.monitoring.enabled=false"] 0B
sha256:461798559927fd64b89cd542fc0c4a44a705701d03db371039e6d5dec5fe82f9 3 minutes ago /bin/sh -c #(nop) USER elasticsearch 0B
sha256:6aa4b9c19b82fb3eb5c3f1e724d4c19bc5cefd1a181d6e9f48f458c038eb452a 9 minutes ago /bin/sh -c tar -xf elasticsearch-6.1.*.tar.gz -C /usr/local/ && mv /usr/local/elasticsearch-6.1* /usr/local/elasticsearch && mkdir /usr/local/elasticsearch/logs && mkdir /usr/local/elasticsearch/data && echo '-Xms512m' > /usr/local/elasticsearch/config/jvm.options && echo '-Xmx512m' >> /usr/local/elasticsearch/config/jvm.options && adduser -D -u 1000 -h /usr/local/elasticsearch elasticsearch && chown -R elasticsearch /usr/local/elasticsearch 31.9MB
sha256:6f987b31a830723196f13d0caf5893af5d8d5f507508149a68b42d8c503ef7ec 9 minutes ago /bin/sh -c wget -e use_proxy=yes https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.1.tar.gz -O elasticsearch-6.1.1.tar.gz 28.5MB
sha256:585c1062a9b0fc66624a6e5ccd7e9a1d16fdfa47558289cc66eee5d553db5af0 9 minutes ago /bin/sh -c #(nop) WORKDIR /root/ 0B
sha256:7cb92f7437a6420234bda929407b69b2f71496fd769af75c7d74c9d4a7055a64 9 minutes ago /bin/sh -c apk update && apk upgrade && apk add curl wget bash openssl openjdk8 && rm -rf /var/cache/apk/* 106MB
sha256:3609a88fead7b3402a0bbca21c465d402220f002cac95cd7d069ae5abfdf33f0 12 minutes ago /bin/sh -c #(nop) ENV HTTPS_PROXY=http://10.31.255.65:8080 0B
sha256:b7e5304c4f6b9d5a277dc73af37556033e1f1552e61739de9c42ed26d05085e2 12 minutes ago /bin/sh -c #(nop) ENV HTTP_PROXY=http://10.31.255.65:8080 0B
sha256:3412535b08f948c8a65a2291dfaf7f0d018b464307bc42b95c6b284ccead6d64 12 minutes ago /bin/sh -c #(nop) ENV https_proxy=http://10.31.255.65:8080 0B
sha256:d4a09d1a4034f0c734b5610a420387d911041d91d9a15d1a85eeb83a2c7ff5ce 12 minutes ago /bin/sh -c #(nop) ENV http_proxy=http://10.31.255.65:8080 0B
sha256:3fd9065eaf02feaf94d68376da52541925650b81698c53c6824d92ff63f98353 18 hours ago /bin/sh -c #(nop) CMD ["/bin/sh"] 0B
<missing> 18 hours ago /bin/sh -c #(nop) ADD file:093f0723fa46f6cdbd6f7bd146448bb70ecce54254c35701feeceb956414622f in / 4.14MB
因此，即使看起来没有，它似乎也在接受我的更改。这很奇怪，因为我之前已经这样做了，但它不起作用，也许我们必须等待一会儿，以便注册表更新他的数据......
而不更改标签
使用docker build -t 'es:6.1' .重建映像时，als0 需要重新标记此新映像，因为映像<user>/es:6.1仍将引用旧映像es:6.1
因此，无论何时执行docker build -t 'es:6.1' .，您都需要运行docker tag es:6.1 <username>/es:6.1
更新
您可能(尽管不寻常)对 dockerfile 所做的更改以前已上传到注册表。
要 100% 确定，请从注册表中拉回映像并使用docker history --no-trunc <user>/es:6.1> 检查 Dockerfile。
如果您可以在 dockerfile 中发现所做的更改，则推送成功。