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[Bug]: File permissions with custom PostgreSQL image

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Description

Testcontainers version

v0.29.1

Using the latest Testcontainers version?

Yes

Host OS

MacOS

Host arch

Arm

Go version

1.21.8

Docker version

Client:
 Cloud integration: v1.0.35+desktop.11
 Version:           25.0.3
 API version:       1.44
 Go version:        go1.21.6
 Git commit:        4debf41
 Built:             Tue Feb  6 21:13:26 2024
 OS/Arch:           darwin/arm64
 Context:           desktop-linux

Server: Docker Desktop 4.28.0 (139021)
 Engine:
  Version:          25.0.3
  API version:      1.44 (minimum version 1.24)
  Go version:       go1.21.6
  Git commit:       f417435
  Built:            Tue Feb  6 21:14:22 2024
  OS/Arch:          linux/arm64
  Experimental:     false
 containerd:
  Version:          1.6.28
  GitCommit:        ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc:
  Version:          1.1.12
  GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Docker info

Client:
 Version:    25.0.3
 Context:    desktop-linux
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.12.1-desktop.4
    Path:     /Users/a/.docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.24.6-desktop.1
    Path:     /Users/a/.docker/cli-plugins/docker-compose
  debug: Get a shell into any image or container. (Docker Inc.)
    Version:  0.0.24
    Path:     /Users/a/.docker/cli-plugins/docker-debug
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.0
    Path:     /Users/a/.docker/cli-plugins/docker-dev
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.22
    Path:     /Users/a/.docker/cli-plugins/docker-extension
  feedback: Provide feedback, right in your terminal! (Docker Inc.)
    Version:  v1.0.4
    Path:     /Users/a/.docker/cli-plugins/docker-feedback
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v1.0.1
    Path:     /Users/a/.docker/cli-plugins/docker-init
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     /Users/a/.docker/cli-plugins/docker-sbom
  scout: Docker Scout (Docker Inc.)
    Version:  v1.5.0
    Path:     /Users/a/.docker/cli-plugins/docker-scout

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 250
 Server Version: 25.0.3
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  seccomp
   Profile: unconfined
  cgroupns
 Kernel Version: 6.6.16-linuxkit
 Operating System: Docker Desktop
 OSType: linux
 Architecture: aarch64
 CPUs: 12
 Total Memory: 19.51GiB
 Name: docker-desktop
 ID: c8e87756-6c7a-42fc-b2c7-7740dc3ca665
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 HTTP Proxy: http.docker.internal:3128
 HTTPS Proxy: http.docker.internal:3128
 No Proxy: hubproxy.docker.internal
 Experimental: false
 Insecure Registries:
  hubproxy.docker.internal:5555
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: daemon is not using the default seccomp profile

What happened?

There is a miss match between running testcontainer and docker run when I mount files and cannot seem to figure out what is the reason.

Example testcontainer code:

postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
		ContainerRequest: testcontainers.ContainerRequest{
			Image: "postgresql-mock",
			Name:  "postgresql_mock",
			Env: map[string]string{
				"POSTGRES_USER":     "random",
				"POSTGRES_PASSWORD": "random",
				"POSTGRES_DB":       "random",
				"POSTGRES_HOST":     "postgresql",
			},
			Privileged:   true,  // tested with false also
			ExposedPorts: []string{"5432/tcp", "8080/tcp"},
			WaitingFor: wait.ForExec([]string{"pg_isready && curl --fail localhost:8080/api/tuner/health || exit 1"}),
			Files: []testcontainers.ContainerFile{
				{
					HostFilePath:      "../cert/server.crt",
					ContainerFilePath: "/var/lib/postgresql/server.crt",
					FileMode:          0o640,
				},
				{
					HostFilePath:      "../cert/server.key",
					ContainerFilePath: "/var/lib/postgresql/server.key",
					FileMode:          0o640,
				},
				{
					HostFilePath:      "../cert/root.crt",
					ContainerFilePath: "/var/lib/postgresql/root.crt",
					FileMode:          0o640,
				},
			}
		},
	})

I tested with various file modes also like 0o600, 0o444 0o440 but no luck.

The errors I get are either this:

FATAL:  could not load server certificate file "/var/lib/postgresql/server.crt": SSL error code 2147483661

or that:

File must have permissions u=rw (0600) or less if owned by the database user, or permissions u=rw,g=r (0640) or less if owned by root

The docker run command seems to work fine:

docker run -d -p 5432:5432 -p 8080:8080 --name postgresql-mock --memory="1250m" \
        -e POSTGRES_PASSWORD=random \
        -e POSTGRES_USER=random \
        -e POSTGRES_DB=random \
        -v "$(pwd)/../cert/server.crt:/var/lib/postgresql/server.crt:ro" \
        -v "$(pwd)/../cert/server.key:/var/lib/postgresql/server.key:ro" \
        -v "$(pwd)/../cert/root.crt:/var/lib/postgresql/root.crt:ro" \
        -v /var/run/docker.sock:/var/run/docker.sock \
        postgresql-mock

Relevant log output

FATAL:  could not load server certificate file "/var/lib/postgresql/server.crt": SSL error code 2147483661

Additional information

No response

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