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Diffstat (limited to 'nixos/doc/manual/administration/imperative-containers.xml')
| -rw-r--r-- | nixos/doc/manual/administration/imperative-containers.xml | 139 |
1 files changed, 61 insertions, 78 deletions
diff --git a/nixos/doc/manual/administration/imperative-containers.xml b/nixos/doc/manual/administration/imperative-containers.xml index d39ac7f8bef4d..9cc7ca3e672a5 100644 --- a/nixos/doc/manual/administration/imperative-containers.xml +++ b/nixos/doc/manual/administration/imperative-containers.xml @@ -3,101 +3,85 @@ xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id="sec-imperative-containers"> + <title>Imperative Container Management</title> -<title>Imperative Container Management</title> - -<para>We’ll cover imperative container management using -<command>nixos-container</command> first. -Be aware that container management is currently only possible -as <literal>root</literal>.</para> - -<para>You create a container with -identifier <literal>foo</literal> as follows: + <para> + We’ll cover imperative container management using + <command>nixos-container</command> first. Be aware that container management + is currently only possible as <literal>root</literal>. + </para> + <para> + You create a container with identifier <literal>foo</literal> as follows: <screen> # nixos-container create foo </screen> - -This creates the container’s root directory in -<filename>/var/lib/containers/foo</filename> and a small configuration -file in <filename>/etc/containers/foo.conf</filename>. It also builds -the container’s initial system configuration and stores it in -<filename>/nix/var/nix/profiles/per-container/foo/system</filename>. You -can modify the initial configuration of the container on the command -line. For instance, to create a container that has -<command>sshd</command> running, with the given public key for -<literal>root</literal>: - + This creates the container’s root directory in + <filename>/var/lib/containers/foo</filename> and a small configuration file + in <filename>/etc/containers/foo.conf</filename>. It also builds the + container’s initial system configuration and stores it in + <filename>/nix/var/nix/profiles/per-container/foo/system</filename>. You can + modify the initial configuration of the container on the command line. For + instance, to create a container that has <command>sshd</command> running, + with the given public key for <literal>root</literal>: <screen> # nixos-container create foo --config ' <xref linkend="opt-services.openssh.enable"/> = true; <link linkend="opt-users.users._name__.openssh.authorizedKeys.keys">users.extraUsers.root.openssh.authorizedKeys.keys</link> = ["ssh-dss AAAAB3N…"]; ' </screen> + </para> -</para> - -<para>Creating a container does not start it. To start the container, -run: - + <para> + Creating a container does not start it. To start the container, run: <screen> # nixos-container start foo </screen> - -This command will return as soon as the container has booted and has -reached <literal>multi-user.target</literal>. On the host, the -container runs within a systemd unit called -<literal>container@<replaceable>container-name</replaceable>.service</literal>. -Thus, if something went wrong, you can get status info using -<command>systemctl</command>: - + This command will return as soon as the container has booted and has reached + <literal>multi-user.target</literal>. On the host, the container runs within + a systemd unit called + <literal>container@<replaceable>container-name</replaceable>.service</literal>. + Thus, if something went wrong, you can get status info using + <command>systemctl</command>: <screen> # systemctl status container@foo </screen> + </para> -</para> - -<para>If the container has started successfully, you can log in as -root using the <command>root-login</command> operation: - + <para> + If the container has started successfully, you can log in as root using the + <command>root-login</command> operation: <screen> # nixos-container root-login foo [root@foo:~]# </screen> - -Note that only root on the host can do this (since there is no -authentication). You can also get a regular login prompt using the -<command>login</command> operation, which is available to all users on -the host: - + Note that only root on the host can do this (since there is no + authentication). You can also get a regular login prompt using the + <command>login</command> operation, which is available to all users on the + host: <screen> # nixos-container login foo foo login: alice Password: *** </screen> - -With <command>nixos-container run</command>, you can execute arbitrary -commands in the container: - + With <command>nixos-container run</command>, you can execute arbitrary + commands in the container: <screen> # nixos-container run foo -- uname -a Linux foo 3.4.82 #1-NixOS SMP Thu Mar 20 14:44:05 UTC 2014 x86_64 GNU/Linux </screen> + </para> -</para> - -<para>There are several ways to change the configuration of the -container. First, on the host, you can edit -<literal>/var/lib/container/<replaceable>name</replaceable>/etc/nixos/configuration.nix</literal>, -and run - + <para> + There are several ways to change the configuration of the container. First, + on the host, you can edit + <literal>/var/lib/container/<replaceable>name</replaceable>/etc/nixos/configuration.nix</literal>, + and run <screen> # nixos-container update foo </screen> - -This will build and activate the new configuration. You can also -specify a new configuration on the command line: - + This will build and activate the new configuration. You can also specify a + new configuration on the command line: <screen> # nixos-container update foo --config ' <xref linkend="opt-services.httpd.enable"/> = true; @@ -108,26 +92,25 @@ specify a new configuration on the command line: # curl http://$(nixos-container show-ip foo)/ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">… </screen> - -However, note that this will overwrite the container’s -<filename>/etc/nixos/configuration.nix</filename>.</para> - -<para>Alternatively, you can change the configuration from within the -container itself by running <command>nixos-rebuild switch</command> -inside the container. Note that the container by default does not have -a copy of the NixOS channel, so you should run <command>nix-channel ---update</command> first.</para> - -<para>Containers can be stopped and started using -<literal>nixos-container stop</literal> and <literal>nixos-container -start</literal>, respectively, or by using -<command>systemctl</command> on the container’s service unit. To -destroy a container, including its file system, do - + However, note that this will overwrite the container’s + <filename>/etc/nixos/configuration.nix</filename>. + </para> + + <para> + Alternatively, you can change the configuration from within the container + itself by running <command>nixos-rebuild switch</command> inside the + container. Note that the container by default does not have a copy of the + NixOS channel, so you should run <command>nix-channel --update</command> + first. + </para> + + <para> + Containers can be stopped and started using <literal>nixos-container + stop</literal> and <literal>nixos-container start</literal>, respectively, or + by using <command>systemctl</command> on the container’s service unit. To + destroy a container, including its file system, do <screen> # nixos-container destroy foo </screen> - -</para> - + </para> </section> |