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Enable no_hosts from containers.conf

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Since we have no good way to enable this on the server side, we will
just allow it to be set on the client side. This should solve almost all
cases.

Partially fixes: https://github.com/containers/podman/issues/9500

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This commit is contained in:
Daniel J Walsh
2021-02-26 06:35:39 -05:00
parent 05410e81ef
commit 680dacaea2
4 changed files with 29 additions and 2 deletions
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2
cmd/podman/common/netflags.go
View File

@ -80,7 +80,7 @@ func DefineNetFlags(cmd *cobra.Command) {
_ = cmd.RegisterFlagCompletionFunc(publishFlagName, completion.AutocompleteNone)
netFlags.Bool(
"no-hosts", false,
"no-hosts", containerConfig.Containers.NoHosts,
"Do not create /etc/hosts within the container, instead use the version from the image",
)
}

6
cmd/podman/containers/create.go
View File

@ -166,7 +166,11 @@ func createInit(c *cobra.Command) error {
return errors.Errorf("--cpu-quota and --cpus cannot be set together")
}
if c.Flag("no-hosts").Changed && c.Flag("add-host").Changed {
noHosts, err := c.Flags().GetBool("no-hosts")
if err != nil {
return err
}
if noHosts && c.Flag("add-host").Changed {
return errors.Errorf("--no-hosts and --add-host cannot be set together")
}
cliVals.UserNS = c.Flag("userns").Value.String()

1
test/e2e/config/containers.conf
View File

@ -55,6 +55,7 @@ umask = "0002"
annotations=["run.oci.keep_original_groups=1",]
no_hosts=true
[engine]
network_cmd_options=["allow_host_loopback=true"]

22
test/e2e/containers_conf_test.go
View File

@ -331,4 +331,26 @@ var _ = Describe("Podman run", func() {
Expect(inspect.OutputToString()).To(ContainSubstring("run.oci.keep_original_groups:1"))
})
It("podman run with --add-host and no-hosts=true fails", func() {
session := podmanTest.Podman([]string{"run", "-dt", "--add-host", "test1:127.0.0.1", ALPINE, "top"})
session.WaitWithDefaultTimeout()
Expect(session).To(ExitWithError())
Expect(session.ErrorToString()).To(ContainSubstring("--no-hosts and --add-host cannot be set together"))
session = podmanTest.Podman([]string{"run", "-dt", "--add-host", "test1:127.0.0.1", "--no-hosts=false", ALPINE, "top"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
})
It("podman run with no-hosts=true /etc/hosts does not include hostname", func() {
session := podmanTest.Podman([]string{"run", "--rm", "--name", "test", ALPINE, "cat", "/etc/hosts"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
Expect(session.OutputToString()).To(Not(ContainSubstring("test")))
session = podmanTest.Podman([]string{"run", "--rm", "--name", "test", "--no-hosts=false", ALPINE, "cat", "/etc/hosts"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
Expect(session.OutputToString()).To(ContainSubstring("test"))
})
})