From 44d1618dd7eeb2560571b14ba5cece69a93dcaff Mon Sep 17 00:00:00 2001 From: Daniel J Walsh Date: Tue, 26 Oct 2021 12:16:21 -0400 Subject: Add --unsetenv & --unsetenv-all to remove def environment variables Podman adds a few environment variables by default, and currently there is no way to get rid of them from your container. This option will allow you to specify which defaults you don't want. --unsetenv-all will remove all default environment variables. Default environment variables can come from podman builtin, containers.conf or from the container image. Fixes: https://github.com/containers/podman/issues/11836 Signed-off-by: Daniel J Walsh --- pkg/api/handlers/types.go | 2 ++ pkg/domain/entities/pods.go | 2 ++ pkg/specgen/generate/container.go | 12 ++++++++---- pkg/specgen/generate/oci.go | 2 +- pkg/specgen/specgen.go | 7 +++++++ pkg/specgenutil/specgen.go | 2 ++ 6 files changed, 22 insertions(+), 5 deletions(-) (limited to 'pkg') diff --git a/pkg/api/handlers/types.go b/pkg/api/handlers/types.go index 35120a1a5..f850db3d8 100644 --- a/pkg/api/handlers/types.go +++ b/pkg/api/handlers/types.go @@ -116,6 +116,8 @@ type CreateContainerConfig struct { dockerContainer.Config // desired container configuration HostConfig dockerContainer.HostConfig // host dependent configuration for container NetworkingConfig dockerNetwork.NetworkingConfig // network configuration for container + UnsetEnv []string // unset specified default environment variables + UnsetEnvAll bool // unset all default environment variables } // swagger:model IDResponse diff --git a/pkg/domain/entities/pods.go b/pkg/domain/entities/pods.go index 70d2be1e6..b255785c2 100644 --- a/pkg/domain/entities/pods.go +++ b/pkg/domain/entities/pods.go @@ -248,6 +248,8 @@ type ContainerCreateOptions struct { TTY bool Timezone string Umask string + UnsetEnv []string + UnsetEnvAll bool UIDMap []string Ulimit []string User string diff --git a/pkg/specgen/generate/container.go b/pkg/specgen/generate/container.go index 002b4ace3..40a18a6ac 100644 --- a/pkg/specgen/generate/container.go +++ b/pkg/specgen/generate/container.go @@ -88,9 +88,6 @@ func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerat if err != nil { return nil, errors.Wrap(err, "error parsing fields in containers.conf") } - if defaultEnvs["container"] == "" { - defaultEnvs["container"] = "podman" - } var envs map[string]string // Image Environment defaults @@ -101,9 +98,16 @@ func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerat if err != nil { return nil, errors.Wrap(err, "Env fields from image failed to parse") } - defaultEnvs = envLib.Join(defaultEnvs, envs) + defaultEnvs = envLib.Join(envLib.DefaultEnvVariables(), envLib.Join(defaultEnvs, envs)) + } + + for _, e := range s.UnsetEnv { + delete(defaultEnvs, e) } + if s.UnsetEnvAll { + defaultEnvs = make(map[string]string) + } // First transform the os env into a map. We need it for the labels later in // any case. osEnv, err := envLib.ParseSlice(os.Environ()) diff --git a/pkg/specgen/generate/oci.go b/pkg/specgen/generate/oci.go index beccd9fc2..1b022b912 100644 --- a/pkg/specgen/generate/oci.go +++ b/pkg/specgen/generate/oci.go @@ -298,7 +298,6 @@ func SpecGenToOCI(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runt for key, val := range s.Annotations { g.AddAnnotation(key, val) } - g.AddProcessEnv("container", "podman") g.Config.Linux.Resources = s.ResourceLimits // Devices @@ -332,6 +331,7 @@ func SpecGenToOCI(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runt BlockAccessToKernelFilesystems(s.Privileged, s.PidNS.IsHost(), s.Mask, s.Unmask, &g) + g.ClearProcessEnv() for name, val := range s.Env { g.AddProcessEnv(name, val) } diff --git a/pkg/specgen/specgen.go b/pkg/specgen/specgen.go index d777287d7..cde456ad0 100644 --- a/pkg/specgen/specgen.go +++ b/pkg/specgen/specgen.go @@ -194,6 +194,13 @@ type ContainerBasicConfig struct { // The execution domain system allows Linux to provide limited support // for binaries compiled under other UNIX-like operating systems. Personality *spec.LinuxPersonality `json:"personality,omitempty"` + // UnsetEnv unsets the specified default environment variables from the image or from buildin or containers.conf + // Optional. + UnsetEnv []string `json:"unsetenv,omitempty"` + // UnsetEnvAll unsetall default environment variables from the image or from buildin or containers.conf + // UnsetEnvAll unsets all default environment variables from the image or from buildin + // Optional. + UnsetEnvAll bool `json:"unsetenvall,omitempty"` } // ContainerStorageConfig contains information on the storage configuration of a diff --git a/pkg/specgenutil/specgen.go b/pkg/specgenutil/specgen.go index 04d3add32..aa59b0a8d 100644 --- a/pkg/specgenutil/specgen.go +++ b/pkg/specgenutil/specgen.go @@ -711,6 +711,8 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *entities.ContainerCreateOptions s.Umask = c.Umask s.PidFile = c.PidFile s.Volatile = c.Rm + s.UnsetEnv = c.UnsetEnv + s.UnsetEnvAll = c.UnsetEnvAll // Initcontainers s.InitContainerType = c.InitContainerType -- cgit v1.2.3-54-g00ecf