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The code is developed and changes made in necessary files for containerization.


Below are the list of steps that needs to performed for creating a container for any component or application

  1. Code Sync /Download
  2. Creation of XML file
  3. Include XML file in container generator recipe - lxc-container-generator-native.bbappend
  4. Providing File permission for the containers
  5. Allowing D-Bus socket to access the containers (Specific to RDK-B Architecture)
  6. Building the lxc image
  7. Flashing the container image

Code Sync/Download

To download code, following commands are needed to be executed

Code Block
languagebash
titleCode sync
$ repo init -u <url> -m <manifest file> -b <branch>
$ repo sync -j4 --no-clone-bundle

#Container Branch 
$ repo init -u https://code.rdkcentral.com/r/manifests -mb rdkb-raspberrypi.xmlcontainer -bm rdkb-container.xml
$ repo sync -j4 --no-clone-bundle

Changes needed in Code base

Creation of XML file

1) Create a *.xml file on the following path meta-cmf-raspberrypi/recipes-containers/lxc-container-generator/files/xml/*.xml

...

Code Block
languagexml
titleExample File: lxc_conf_Psm.xml
<?xml version="1.0" encoding="ISO-8859-1"?>

<CONTAINER  SandboxName="PSMSSP">
    <LxcParams>
        <LauncherName>PsmSsp</LauncherName>
        <ExecName>/usr/bin/PsmSsp</ExecName>
        <ExecParams>-subsys eRT.</ExecParams>
                <SystemdNotify create="yes">
                        <PidFile>/var/tmp/PsmSsp.pid</PidFile>
                </SystemdNotify>
        <StopFunction enable="true"></StopFunction>
    </LxcParams>
        <LxcConfig>
-        <UserName>psm</UserName>
        <GroupName>psm</GroupName> 
        <CGroupSettings>
            <DeviceCgroup>
                <DevicesDeny>a</DevicesDeny>
                <AllowDefaultDevices enable="yes"/>
            </DeviceCgroup>
        </CGroupSettings>
                <Environment>
                   <Variable>DBUS_SESSION_BUS_ADDRESS=unix:path=/var/run/dbus/system_bus_socket</Variable>
                </Environment>


        <Network type="none"></Network>
                <Dbus enable="true"></Dbus>
        <Rootfs create="yes">
            <MountPoints>
<!-- /bin -->
                <Entry type="file">
                    <Source>/bin/sh</Source>
                    <Destination>bin/sh</Destination>
                    <Options>ro,bind,nosuid,nodev</Options>
                </Entry>
                <Entry type="file">
                    <Source>/usr/bin/PsmSsp</Source>
                    <Destination>usr/bin/PsmSsp</Destination>
                    <Options>ro,bind,nosuid,nodev</Options>
                </Entry>

                <Entry type="file">
                    <Source>/bin/touch</Source>
                    <Destination>bin/touch</Destination>
                    <Options>ro,bind,nosuid,nodev</Options>
                </Entry>
                <Entry type="file">
  

<!--rdklogs-->
                <Entry type="dir">
                                        <Source>/rdklogs</Source>
                                        <Destination>rdklogs</Destination>
                                        <Options>rw,bind,noexec,nosuid</Options>
                 </Entry>

            </MountPoints>

            <LibsRoBindMounts>
                <Entry>ld</Entry>
                <Entry>libtr181</Entry>
                <Entry>libxml2</Entry>
                <Entry>libz</Entry>
                <Entry>libccsp_common</Entry>
                <Entry>libsyscfg</Entry>
                <Entry>libsysevent</Entry>
				 ...
                <Entry>liblzma</Entry>
                <Entry>libdl</Entry>
                <Entry>libtinfo</Entry>
            
            </LibsRoBindMounts>
        </Rootfs>
</LxcConfig>
</CONTAINER>


Include XML file in container generator recipe - lxc-container-generator-native.bbappend

2) Include the lxc_conf_<NAME>.xml file on the bb file meta-cmf-raspberrypi/recipes-containers/lxc-container-generator/lxc-container-generator-native.bbappend

Code Block
titleAdding XML into recipie
#For example, Adding lxc_conf_Psm.xml to the recipie

SRC_URI_append = "${@bb.utils.contains('DISTRO_FEATURES', 'lxc-secure-containers-br', ' file://xml/lxc_conf_Psm.xml ', '', d)}"

do_install_append () {
    ${@bb.utils.contains('DISTRO_FEATURES', 'lxc-secure-containers-br', ' install_lxc_config secure lxc_conf_Psm.xml ', '', d)}
}


Providing File permission for the containers

3)  Provide user permission  for the new container to run as unprivileged , in meta-cmf-raspberrypi/recipes-core/images/add-users-groups-file-owners-and-permissions-broadband.inc

...

Code Block
titleAdding user and permission
EXTRA_USERS_PARAMS += "\
    useradd -u <uid> -G dbusgrp                            -r -s /bin/false <container_user_name>           ; \

   ROOTFS_CHOWN_SETCAP += " -o <container_user_name>:<container_group_name> -m o-rwx /usr/bin/application_name     \n"     

---------------------------------------------------------------------------------------------------------------------
#Adding PSM permission

 EXTRA_USERS_PARAMS += "\
    useradd -u 703 -G dbusgrp                            -r -s /bin/false psm           ; \

   ROOTFS_CHOWN_SETCAP += " -o psm:psm -m o-rwx /usr/bin/PsmSsp     \n"  


Allowing D-Bus socket to access the containers (Specific to RDK-B Architecture)

 Dbus  4)  Dbus socket should allow the newly created conatiner to access system bus, to do so ,we need to add the conatiner user name  to system.conf

Code Block
titleAdding user and permission
#Add the new user name in below line ,

sed -i '/allow user/c\<deny user="*"/>\n<allow user="ccspcr"/>\n<allow user="psm"/>\n<allow user="pandm"/>\n<allow user="ccspwifi"/>\n<allow user="USER_NAME"/>\n<allow user="ccsplmlite"/>\n<allow user="root"/>' ${D}/usr/share/dbus-1/system.conf

Building the lxc image

Compile/build

Go to the <workspace>

...

raspberrypi-rdk-broadband-lxcrdk-generic-broadband-lxc-image_default_20190327101556.rootfs.rpi-sdimg

Flashing the container image

Command to flash the image

...

5530

root

0.00

/usr/bin/lxc-execute -n PSMSSP -f /container/PSMSSP/conf/lxc.conf -- /usr/bin/PsmSsp -subsys eRT .

5534

psm

0.00

/init.lxc.static –gid 705 –uid 705 -- /usr/bin/PsmSsp -subsys eRT .

6433

root

0.00

/usr/bin/lxc-execute -n CCSPPANDM -f /container/CCSPPANDM/conf/lxc.conf -- /usr/bin/gw_prov_utopia

6435

pandm

0.00

/init.lxc.static –gid 706 –uid 706 -- /usr/bin/gw_prov_utopia

6520

root

0.00

/usr/bin/lxc-execute -n DBUS -f /container/DBUS/conf/lxc.conf -- /usr/bin/dbus-daemon –system –nofork –nopidfile –systemd-activation

6532

dbus

0.00

/init.lxc.static –gid 703 –uid 703 -- /usr/bin/dbus-daemon –system –nofork –nopidfile –systemd-activation

6574

root

0.00

/usr/bin/lxc-execute -n CCSPCR -f /container/CCSPCR/conf/lxc.conf -- /usr/bin/CcspCrSsp -subsys eRT .

6577

ccspcr

0.00

/init.lxc.static –gid 704 –uid 704 -- /usr/bin/CcspCrSsp -subsys eRT .

6737

root

0.00

grep lxc


WiFi Container :: Manual Start

Due to some limitations in invoking wifi driver with container permission, ccspwifi container has to be run manually in latest environment with below procedure

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