Adding initial container info command.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>

4 files changed, 320 insertions, 0 deletions

diff --git a/libexec/container/info b/libexec/container/info
new file mode 100755
index 0000000..63c42ff
--- /dev/null
+++ b/libexec/container/info
@@ -0,0 +1,214 @@
+#!/bin/sh
+
+# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+#
+# SPDX-License-Identifier: GPL-3.0+
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+set -e
+
+PROJECT="open-infrastructure"
+SOFTWARE="compute-tools"
+PROGRAM="container"
+COMMAND="$(basename ${0})"
+
+CONFIG="/etc/${SOFTWARE}/config"
+HOOKS="/etc/${SOFTWARE}/hooks"
+MACHINES="/var/lib/machines"
+
+VERSION="$(${PROGRAM} version)"
+
+Parameters ()
+{
+	GETOPT_LONGOPTIONS="name:,status,os,ip,"
+	GETOPT_OPTIONS="n:,"
+
+	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${COMMAND} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
+
+	if [ "${?}" != "0" ]
+	then
+		echo "'${COMMAND}': getopt exit" >&2
+		exit 1
+	fi
+
+	eval set -- "${PARAMETERS}"
+
+	while true
+	do
+		case "${1}" in
+			-n|--name)
+				NAME="${2}"
+				shift 2
+				;;
+
+			--status)
+				ACTIONS="${ACTIONS} status"
+				shift 1
+				;;
+
+			--os)
+				ACTIONS="${ACTIONS} os"
+				shift 1
+				;;
+
+			--ip)
+				ACTIONS="${ACTIONS} ip"
+				shift 1
+				;;
+
+			--)
+				shift 1
+				break
+				;;
+
+			*)
+				echo "'${COMMAND}': getopt error" >&2
+				exit 1
+				;;
+		esac
+	done
+}
+
+Usage ()
+{
+	echo "Usage: ${PROGRAM} ${COMMAND} -n|--name NAME [--status] [--os] [--ip]" >&2
+	exit 1
+}
+
+Parameters "${@}"
+
+# Pre hooks
+for FILE in "${HOOKS}/pre-${COMMAND}".* "${HOOKS}/${NAME}.pre-${COMMAND}"
+do
+	if [ -x "${FILE}" ]
+	then
+		"${FILE}"
+	fi
+done
+
+ACTIONS="${ACTIONS:-status os ip}"
+HOST="$(cat /etc/hostname)"
+
+# Run
+
+# Status
+STATUS="$(machinectl show ${NAME} 2>&1 | awk -FState= '/^State=/ { print $2 }')"
+
+if [ -e "${CONFIG}/${NAME}.conf" ]
+then
+	CONTAINER_SERVER="$(awk -Fcnt.container-server= '/^cnt.container-server=/ { print $2 }' ${CONFIG}/${NAME}.conf)"
+	CONTAINER_SERVER="${CONTAINER_SERVER:-false}"
+
+	case "${CONTAINER_SERVER}" in
+		${HOST}|true)
+			;;
+
+		*)
+			STATUS="other"
+			;;
+	esac
+else
+	STATUS="other"
+fi
+
+case "${STATUS}" in
+	running)
+		STATUS="started"
+	;;
+
+	other)
+		;;
+
+	*)
+		STATUS="stopped"
+		;;
+esac
+
+# OS
+VERSION_BASH="$(chroot ${MACHINES}/${NAME} apt-cache policy bash | awk '/Installed: / { print $2 }')"
+
+case "${VERSION_BASH}" in
+	4.1*)
+		OS="Debian 6 (squeeze)"
+		;;
+
+	4.2*)
+		OS="Debian 7 (wheezy)"
+		;;
+
+	4.3*)
+		OS="Debian 8 (jessie)"
+		;;
+
+	4.4*)
+		OS="Debian 9 (stretch)"
+		;;
+
+	5.0*)
+		OS="Debian 10 (buster)"
+		;;
+
+	5.1*)
+		OS="Debian 11 (bullseye)"
+		;;
+
+	*)
+		OS="n/a"
+		;;
+esac
+
+case "${STATUS}" in
+	started)
+		IP="$(cnt run -n ${NAME} -- hostname -I | awk '{ print $1 }')"
+		;;
+
+	*)
+		if ls "${MACHINES}/${CONTAINER}/etc/systemd/network"/*.network > /dev/null 2>&1
+		then
+			IP="$(awk -FAddress= '/^Address/ { print $2 }' ${MACHINES}/${CONTAINER}/etc/systemd/network/*.network | head -n1)"
+		elif [ -e "${MACHINES}/${CONTAINER}/etc/network/interfaces" ]
+		then
+			IP="$(awk '/address/ { print $2 }' ${MACHINES}/${CONTAINER}/etc/network/interfaces | head -n1)"
+		fi
+
+		IP="${IP:-n/a}"
+		;;
+esac
+
+for ACTION in ${ACTIONS}
+do
+	case "${ACTION}" in
+		status)
+			echo "${STATUS}"
+			;;
+
+		os)
+			echo "${OS}"
+			;;
+
+		ip)
+			echo "${IP}"
+			;;
+	esac
+done
+
+# Post hooks
+for FILE in "${HOOKS}/post-${COMMAND}".* "${HOOKS}/${NAME}.post-${COMMAND}"
+do
+	if [ -x "${FILE}" ]
+	then
+		"${FILE}"
+	fi
+done
diff --git a/share/bash-completion/container b/share/bash-completion/container
index 540f162..cfa5740 100644
--- a/share/bash-completion/container
+++ b/share/bash-completion/container
@@ -97,6 +97,22 @@ _container()
 			esac
 			;;
 
+		info)
+			case "${prev}" in
+				-n|--name)
+					opts="$(container list -t -f shell)"
+					COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+					return 0
+					;;
+
+				*)
+					opts="--status --os --ip"
+					COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+					return 0
+					;;
+			esac
+			;;
+
 		key)
 			opts="-a --add -l --list -r --remove"
 			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
diff --git a/share/man/container-info.1.txt b/share/man/container-info.1.txt
new file mode 100644
index 0000000..125bdef
--- /dev/null
+++ b/share/man/container-info.1.txt
@@ -0,0 +1,87 @@
+// Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+//
+// SPDX-License-Identifier: GPL-3.0+
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+CONTAINER-LIST(1)
+=================
+:doctype: manpage
+:man manual: Open Infrastructure
+:man source: compute-tools
+:man version: {revnumber}
+
+
+NAME
+----
+container-info - Show specific information of a container
+
+
+SYNOPSIS
+--------
+*container info* ['OPTIONS']
+
+
+DESCRIPTION
+-----------
+The container info command shows specific information of a container.
+
+
+OPTIONS
+-------
+The following container options are available, defaults to *--status --os --ip*:
+
+*--status*::
+	Show container status (started|stopped|other).
+
+*--os*::
+	Show container operating system (FIXME: Debian only).
+
+*--ip*::
+	Show container IP address.
+
+EXAMPLES
+--------
+*Show example.net container status:*::
+	sudo container info -n example.net --status
+
+*Show example.net container operating system:*::
+	sudo container info -n example.net --os
+
+*Show example.net container IP address:*::
+	sudo container info -n example.net --ip
+
+
+SEE ALSO
+--------
+compute-tools(7),
+container(1).
+
+
+HOMEPAGE
+--------
+More information about compute-tools and the Open Infrastructure project can be found on the homepage at https://open-infrastructure.net.
+
+
+CONTACT
+-------
+Bug reports, feature requests, help, patches, support and everything else
+are welcome on the Open Infrastructure Software Mailing List <software@lists.open-infrastructure.net>.
+
+Debian specific bugs can also be reported in the Debian Bug Tracking System at https://bugs.debian.org.
+
+
+AUTHORS
+-------
+compute-tools were written by Daniel Baumann <daniel.baumann@open-infrastructure.net> and others.
diff --git a/share/man/container.1.txt b/share/man/container.1.txt
index 7edc1f4..d2734d2 100644
--- a/share/man/container.1.txt
+++ b/share/man/container.1.txt
@@ -78,6 +78,9 @@ The following container commands are available:
 *run*::
 	Execute commands in a container namespace, see container-run(1).
 
+*info*::
+	Show specific information of a container, see container-info(1).
+
 *key*::
 	Manage GnuPG keyring for container operations, see container-key(1).