Table of Contents
Table of Contents
Table of Contents
Table of Contents
This policy is inventory related to linux hosts.
common bodies
inventory_linux
Prototype: inventory_linux
Description: Linux inventory
This common bundle is for Linux inventory work.
Provides: os_release_id, and os_release_version based on parsing of /etc/os-release systemd class based on linktarget of /proc/1/cmdline
Implementation:
bundle common inventory_linux
{
vars:
has_os_release::
"os_release_info" string => readfile("/etc/os-release", "512"),
comment => "Read /etc/os-release" ;
os_release_has_id::
"os_release_id" string => canonify("$(id_array[1])");
os_release_has_version::
"os_release_version" string => canonify("$(version_array[1])");
has_proc_1_cmdline::
"proc_1_cmdline_split" slist => string_split(readfile("/proc/1/cmdline", "512"), " ", "2"),
comment => "Read /proc/1/cmdline and split off arguments";
"proc_1_cmdline" string => nth("proc_1_cmdline_split", 0),
comment => "Get argv[0] of /proc/1/cmdline";
# this is the same as the original file for non-links
"proc_1_process" string => filestat($(proc_1_cmdline), "linktarget");
any::
"proc_routes" data => data_readstringarrayidx("/proc/net/route",
"#[^\n]*","\s+",40,4k),
ifvarclass => fileexists("/proc/net/route");
"routeidx" slist => getindices("proc_routes");
"dgw_ipv4_iface" string => "$(proc_routes[$(routeidx)][0])",
comment => "Name of the interface where default gateway is routed",
ifvarclass => strcmp("$(proc_routes[$(routeidx)][1])", "00000000");
linux::
"nfs_servers" -> { "CFE-3259" }
comment => "NFS servers (to list hosts impacted by NFS outages)",
slist => maplist( regex_replace( $(this) , ":.*", "", "g"),
# NFS server is before the colon (:), that's all we want
# e.g., nfs.example.com:/vol/homedir/user1 /home/user1 ...
# ^^^^^^^^^^^^^^^
grep( ".* nfs .*",
readstringlist("/proc/mounts", "", "\n", inf, inf)
)
),
if => fileexists( "/proc/mounts" );
"nfs_server[$(nfs_servers)]"
string => "$(nfs_servers)",
meta => { "inventory", "attribute_name=NFS Server" };
classes:
any::
"has_os_release" expression => fileexists("/etc/os-release"),
comment => "Check if we can get more info from /etc/os-release";
"os_release_has_id" expression => regextract('^ID="?([^"\s]+)"?$',
$(os_release_info),
"id_array"),
comment => "Extract ID= line from os-release to id_array";
"os_release_has_version" expression => regextract('^VERSION_ID="?([^"]+)"?$',
$(os_release_info),
"version_array"),
comment => "Extract VERSION_ID= line from os-release to version_array";
"has_proc_1_cmdline" expression => fileexists("/proc/1/cmdline"),
comment => "Check if we can read /proc/1/cmdline";
os_release_has_id::
"$(os_release_id)" expression => "any";
os_release_has_version::
"$(os_release_id)_$(os_release_version)" expression => "any";
has_proc_1_cmdline::
"systemd" expression => strcmp(lastnode($(proc_1_process), "/"), "systemd"),
comment => "Check if (the link target of) /proc/1/cmdline is systemd";
reports:
(DEBUG|DEBUG_inventory_linux).has_os_release::
"DEBUG $(this.bundle)";
"$(const.t)OS release ID = $(os_release_id), OS release version = $(os_release_version)";
}