qm(8) - f38

1QM(8)                       System Manager's Manual                      QM(8)
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NAME

6       QM  -  Set up a Containerized environment for running Functional Safety
7       QM (Quality Management) software.
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SYNOPSIS

11       This package allows users to set up an environment that prevents appli‐
12       cations  and  container  tools from interfering with other processes on
13       the system.
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16       The QM runs its own version of systemd and Podman to isolate  not  only
17       the applications and containers launched by systemd and Podman but also
18       systemd and Podman themselves. In other words, the systemd  and  Podman
19       launched  within the QM environment cannot affect the systemd or Podman
20       processes running outside of that environment.
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23       Software installed into the QM environment under the /usr/lib/qm/rootfs
24       directory  is  automatically isolated from the host. If developers need
25       to further isolate their applications from other processes in  the  QM,
26       they should use container tools like Podman.
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INSTALL

30       After   the   QM   software   package   is   installed,   execute   the
31       /usr/share/qm/setup script to setup and install the  /usr/lib/qm/rootfs
32       with packages to run an isolated environment. The setup script installs
33       the selinux-policy-targeted, podman,  systemd,  and  bluechi  packages.
34       Setup  then  enables  and  starts  a  Podman quadlet service qm.service
35       (qm.container).
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38       This Podman quadlet can be examined with the following command:
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40       systemctl status qm.service
41       ● qm.service
42            Loaded: loaded (/etc/containers/systemd/qm.container; generated)
43           Drop-In: /usr/lib/systemd/system/service.d
44                    └─10-timeout-abort.conf
45            Active: active (running) since Tue 2023-04-11 15:43:45 EDT; 28min ago
46          Main PID: 993674 (conmon)
47             Tasks: 11 (limit: 76801)
48            Memory: 275.1M (swap max: 0B)
49               CPU: 4.527s
50            CGroup: /QM.slice/qm.service
51                    ├─libpod-payload-00de006493bc970788d6c830beb494a58a9a2847a5eda200812d3a8b4e214814
52                    │ ├─init.scope
53                    │ │ └─993676 /sbin/init
54                    │ └─system.slice
55                    │   ├─dbus-broker.service
56                    │   │ ├─993763 /usr/bin/dbus-broker-launch --scope system --audit
57                    │   │ └─993764 dbus-broker --log 4 --controller 9 --machine-id 4ce4c21b211d41e78b7b64418c1c0cb5 -->
58                    │   ├─systemd-journald.service
59                    │   │ └─993718 /usr/lib/systemd/systemd-journald
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CGROUPS QM.slice

64       Notice that the QM environment is running systemd  and  other  services
65       within  the QM.Slice. This slice can be used to modify the cgroups con‐
66       trols of all of the processes within the QM environment.
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Install Additional packages in QM

70       If other packages need to be added into the QM environment, use the dnf
71       command  on  the  host. For example, the following example installs the
72       dnf command into the QM environment:
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74       # dnf install --installroot=/usr/lib/qm/rootfs dnf
75       Unable to read consumer identity
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77       Last metadata expiration check: 0:33:12 ago on Tue 11 Apr 2023 03:42:09 PM EDT.
78       Dependencies resolved.
79       ================================================================================================================
80        Package                                Architecture       Version                     Repository          Size
81       ================================================================================================================
82       Installing:
83        dnf                                    noarch             4.14.0-2.fc38               fedora             478 k
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Entering the QM

88       To enter the QM environment, use this Podman command to launch contain‐
89       ers within it.
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91       sh-5.2# podman exec -ti qm sh
92       sh-5.2#
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96       The SELinux label can be checked by executing the following:
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98       sh-5.2# id -Z
99       system_u:system_r:qm_t:s0:c35,c404
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103       Notice that the process is running as qm_t, indicating that the process
104       is a confined QM process within the QM environment.
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107       Containers can now be run within the QM environment using Podman.
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109       sh-5.2# podman run --rm ubi9-minimal echo hi
110       Resolved "ubi9-minimal" as an alias (/etc/containers/registries.conf.d/000-shortnames.conf)
111       Trying to pull registry.access.redhat.com/ubi9-minimal:latest...
112       Getting image source signatures
113       Checking if image destination supports signatures
114       Copying blob 7bffb309b4e8 done
115       Copying config 96179718b4 done
116       Writing manifest to image destination
117       Storing signatures
118       hi
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122       It is recommended that Podman quadlets are used to run additional  con‐
123       tainerized  applications  within the QM. All applications within the QM
124       environment are prevented from interfering  with  applications  running
125       outside of the QM environment.
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Configuring bluechi agent in the QM

129       The  configuration  of the hosts /etc/bluechi/agent.conf file is copied
130       into the QM every time the qm.service is started, with the nodename  of
131       the  hosts  agent.conf  modified by prepending qm.  on the front of the
132       nodename. If the hosts /etc/bluechi/agent.conf does  not  exists,  then
133       the QM bluechi agent will default to qm.$(hostname).
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136       If  you want permanently modify the bluechi agent within the QM you can
137       add config to /usr/lib/qm/rootfs/etc/bluechi/agent.conf.d/ directory or
138       modify the /etc/containers/systemd/qm.container quadlet file to not ex‐
139       ecute the bluechi-agent setup script.
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