From 647579068f62d40cc7a63972a13df25086d4dc4a Mon Sep 17 00:00:00 2001 From: Aleksa Sarai Date: Mon, 18 Jun 2018 21:58:23 +1000 Subject: [PATCH] cli: add a separate --domainname flag A while ago, Docker split the "Domainname" field out from the "Hostname" field for the container configuration. There was no real user-visible change associated with this (and under the hood "Domainname" was mostly left unused from the command-line point of view). We now add this flag in order to match other proposed changes to allow for setting the NIS domainname of a container. This also includes a fix for the --hostname parsing tests (they would not error out if only one of .Hostname and .Domainname were incorrectly set -- which is not correct). Signed-off-by: Aleksa Sarai --- cli/command/container/opts.go | 3 +++ cli/command/container/opts_test.go | 31 +++++++++++++++++++++++----- contrib/completion/bash/docker | 5 +++-- contrib/completion/zsh/_docker | 1 + docs/reference/commandline/create.md | 1 + docs/reference/commandline/run.md | 1 + docs/reference/run.md | 6 +++--- man/docker-run.1.md | 7 +++++++ 8 files changed, 45 insertions(+), 10 deletions(-) diff --git a/cli/command/container/opts.go b/cli/command/container/opts.go index 97906b6722..7cd9ce998c 100644 --- a/cli/command/container/opts.go +++ b/cli/command/container/opts.go @@ -74,6 +74,7 @@ type containerOptions struct { containerIDFile string entrypoint string hostname string + domainname string memory opts.MemBytes memoryReservation opts.MemBytes memorySwap opts.MemSwapBytes @@ -169,6 +170,7 @@ func addFlags(flags *pflag.FlagSet) *containerOptions { flags.StringVar(&copts.entrypoint, "entrypoint", "", "Overwrite the default ENTRYPOINT of the image") flags.Var(&copts.groupAdd, "group-add", "Add additional groups to join") flags.StringVarP(&copts.hostname, "hostname", "h", "", "Container host name") + flags.StringVar(&copts.domainname, "domainname", "", "Container NIS domain name") flags.BoolVarP(&copts.stdin, "interactive", "i", false, "Keep STDIN open even if not attached") flags.VarP(&copts.labels, "label", "l", "Set meta data on a container") flags.Var(&copts.labelsFile, "label-file", "Read in a line delimited file of labels") @@ -546,6 +548,7 @@ func parse(flags *pflag.FlagSet, copts *containerOptions) (*containerConfig, err config := &container.Config{ Hostname: copts.hostname, + Domainname: copts.domainname, ExposedPorts: ports, User: copts.user, Tty: copts.tty, diff --git a/cli/command/container/opts_test.go b/cli/command/container/opts_test.go index 6d7c95a5dd..70bedc6617 100644 --- a/cli/command/container/opts_test.go +++ b/cli/command/container/opts_test.go @@ -265,14 +265,35 @@ func TestParseHostname(t *testing.T) { hostnameWithDomainTld := "--hostname=hostname.domainname.tld" for hostname, expectedHostname := range validHostnames { if config, _ := mustParse(t, fmt.Sprintf("--hostname=%s", hostname)); config.Hostname != expectedHostname { - t.Fatalf("Expected the config to have 'hostname' as hostname, got '%v'", config.Hostname) + t.Fatalf("Expected the config to have 'hostname' as %q, got %q", expectedHostname, config.Hostname) } } - if config, _ := mustParse(t, hostnameWithDomain); config.Hostname != "hostname.domainname" && config.Domainname != "" { - t.Fatalf("Expected the config to have 'hostname' as hostname.domainname, got '%v'", config.Hostname) + if config, _ := mustParse(t, hostnameWithDomain); config.Hostname != "hostname.domainname" || config.Domainname != "" { + t.Fatalf("Expected the config to have 'hostname' as hostname.domainname, got %q", config.Hostname) } - if config, _ := mustParse(t, hostnameWithDomainTld); config.Hostname != "hostname.domainname.tld" && config.Domainname != "" { - t.Fatalf("Expected the config to have 'hostname' as hostname.domainname.tld, got '%v'", config.Hostname) + if config, _ := mustParse(t, hostnameWithDomainTld); config.Hostname != "hostname.domainname.tld" || config.Domainname != "" { + t.Fatalf("Expected the config to have 'hostname' as hostname.domainname.tld, got %q", config.Hostname) + } +} + +func TestParseHostnameDomainname(t *testing.T) { + validDomainnames := map[string]string{ + "domainname": "domainname", + "domain-name": "domain-name", + "domainname123": "domainname123", + "123domainname": "123domainname", + "domainname-63-bytes-long-should-be-valid-and-without-any-errors": "domainname-63-bytes-long-should-be-valid-and-without-any-errors", + } + for domainname, expectedDomainname := range validDomainnames { + if config, _ := mustParse(t, "--domainname="+domainname); config.Domainname != expectedDomainname { + t.Fatalf("Expected the config to have 'domainname' as %q, got %q", expectedDomainname, config.Domainname) + } + } + if config, _ := mustParse(t, "--hostname=some.prefix --domainname=domainname"); config.Hostname != "some.prefix" || config.Domainname != "domainname" { + t.Fatalf("Expected the config to have 'hostname' as 'some.prefix' and 'domainname' as 'domainname', got %q and %q", config.Hostname, config.Domainname) + } + if config, _ := mustParse(t, "--hostname=another-prefix --domainname=domainname.tld"); config.Hostname != "another-prefix" || config.Domainname != "domainname.tld" { + t.Fatalf("Expected the config to have 'hostname' as 'another-prefix' and 'domainname' as 'domainname.tld', got %q and %q", config.Hostname, config.Domainname) } } diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker index f195a81ebd..9c40c1cda4 100644 --- a/contrib/completion/bash/docker +++ b/contrib/completion/bash/docker @@ -5,8 +5,8 @@ # - SC2016: Expressions don't expand in single quotes, use double quotes for that. # - SC2119: Use foo "$@" if function's $1 should mean script's $1. # - SC2155: Declare and assign separately to avoid masking return values. -# -# You can find more details for each warning at the following page: +# +# You can find more details for each warning at the following page: # https://github.com/koalaman/shellcheck/wiki/ # # bash completion file for core docker commands @@ -1802,6 +1802,7 @@ _docker_container_run_and_create() { --dns --dns-option --dns-search + --domainname --entrypoint --env -e --env-file diff --git a/contrib/completion/zsh/_docker b/contrib/completion/zsh/_docker index a0b76f2a73..54b5e59c5e 100644 --- a/contrib/completion/zsh/_docker +++ b/contrib/completion/zsh/_docker @@ -617,6 +617,7 @@ __docker_container_subcommand() { "($help)*--dns=[Custom DNS servers]:DNS server: " "($help)*--dns-option=[Custom DNS options]:DNS option: " "($help)*--dns-search=[Custom DNS search domains]:DNS domains: " + "($help)*--domainname=[Container NIS domain name]:domainname:_hosts" "($help)*"{-e=,--env=}"[Environment variables]:environment variable: " "($help)--entrypoint=[Overwrite the default entrypoint of the image]:entry point: " "($help)*--env-file=[Read environment variables from a file]:environment file:_files" diff --git a/docs/reference/commandline/create.md b/docs/reference/commandline/create.md index d585da40ae..c829dbb3e5 100644 --- a/docs/reference/commandline/create.md +++ b/docs/reference/commandline/create.md @@ -53,6 +53,7 @@ Options: --dns value Set custom DNS servers (default []) --dns-option value Set DNS options (default []) --dns-search value Set custom DNS search domains (default []) + --domainname string Container NIS domain name --entrypoint string Overwrite the default ENTRYPOINT of the image -e, --env value Set environment variables (default []) --env-file value Read in a file of environment variables (default []) diff --git a/docs/reference/commandline/run.md b/docs/reference/commandline/run.md index 08b9f18d68..f448e1acf8 100644 --- a/docs/reference/commandline/run.md +++ b/docs/reference/commandline/run.md @@ -57,6 +57,7 @@ Options: --dns value Set custom DNS servers (default []) --dns-option value Set DNS options (default []) --dns-search value Set custom DNS search domains (default []) + --domainname string Container NIS domain name --entrypoint string Overwrite the default ENTRYPOINT of the image -e, --env value Set environment variables (default []) --env-file value Read in a file of environment variables (default []) diff --git a/docs/reference/run.md b/docs/reference/run.md index a59a305255..695974fe53 100644 --- a/docs/reference/run.md +++ b/docs/reference/run.md @@ -256,7 +256,7 @@ The UTS namespace is for setting the hostname and the domain that is visible to running processes in that namespace. By default, all containers, including those with `--network=host`, have their own UTS namespace. The `host` setting will result in the container using the same UTS namespace as the host. Note that -`--hostname` is invalid in `host` UTS mode. +`--hostname` and `--domainname` are invalid in `host` UTS mode. You may wish to share the UTS namespace with the host if you would like the hostname of the container to change as the hostname of the host changes. A @@ -396,8 +396,8 @@ network stack and all interfaces from the host will be available to the container. The container's hostname will match the hostname on the host system. Note that `--mac-address` is invalid in `host` netmode. Even in `host` network mode a container has its own UTS namespace by default. As such -`--hostname` is allowed in `host` network mode and will only change the -hostname inside the container. +`--hostname` and `--domainname` are allowed in `host` network mode and will +only change the hostname and domain name inside the container. Similar to `--hostname`, the `--add-host`, `--dns`, `--dns-search`, and `--dns-option` options can be used in `host` network mode. These options update `/etc/hosts` or `/etc/resolv.conf` inside the container. No change are made to diff --git a/man/docker-run.1.md b/man/docker-run.1.md index e03377001d..4a1464a742 100644 --- a/man/docker-run.1.md +++ b/man/docker-run.1.md @@ -35,6 +35,7 @@ docker-run - Run a command in a new container [**--dns**[=*[]*]] [**--dns-option**[=*[]*]] [**--dns-search**[=*[]*]] +[**--domainname**[=*DOMAINNAME*]] [**-e**|**--env**[=*[]*]] [**--entrypoint**[=*ENTRYPOINT*]] [**--env-file**[=*[]*]] @@ -285,6 +286,12 @@ configuration passed to the container. Typically this is necessary when the host DNS configuration is invalid for the container (e.g., 127.0.0.1). When this is the case the **--dns** flags is necessary for every run. +**--domainname**="" + Container NIS domain name + + Sets the container's NIS domain name (see also **setdomainname(2)**) that is + available inside the container. + **-e**, **--env**=[] Set environment variables