docker-build-context
Exemplo de como buildar uma imagem Docker carregando um arquivo como contexto.
Sem carregar o contexto apropriado, o comando de build irá falhar:
$ docker build .
[+] Building 0.9s (7/7) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 36B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/busybox:latest 0.7s
=> [auth] library/busybox:pull token for registry-1.docker.io 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 2B 0.0s
=> [1/2] FROM docker.io/library/busybox@sha256:5acba83a746c7608ed544dc1533b87c737a0b0fb730301639a0179f9344b1678 0.0s
=> ERROR [2/2] COPY hello.txt / 0.0s
------
> [2/2] COPY hello.txt /:
------
failed to compute cache key: "/hello.txt" not found: not foundMas se carregarmos o arquivo de contexto o build funciona:
$ docker build - < context.tar.gz
[+] Building 0.4s (6/6) FINISHED
=> CACHED [internal] load remote build context 0.0s
=> CACHED copy /context / 0.0s
=> [internal] load metadata for docker.io/library/busybox:latest 0.3s
=> [1/2] FROM docker.io/library/busybox@sha256:5acba83a746c7608ed544dc1533b87c737a0b0fb730301639a0179f9344b1678 0.0s
=> CACHED [2/2] COPY hello.txt / 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:0d2eb96b643d5ede03c36c0d9039cdfe5e58559fb1c8ec7faace80aef8ced58f 0.0s
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix themPara listar o conteúdo do arquivo de contexto:
$ tar -tzf context.tar.gz
Dockerfile
hello.txt