Extract and parse LXD instance information.
List LXD instances.
$ lxc list
+---------+---------+---------------------+------+-----------+-----------+ | NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS | +---------+---------+---------------------+------+-----------+-----------+ | adguard | RUNNING | 10.114.53.3 (eth0) | | CONTAINER | 0 | +---------+---------+---------------------+------+-----------+-----------+ | named | RUNNING | 10.114.53.4 (eth0) | | CONTAINER | 0 | +---------+---------+---------------------+------+-----------+-----------+ | unbound | RUNNING | 10.114.53.12 (eth0) | | CONTAINER | 0 | +---------+---------+---------------------+------+-----------+-----------+
Display instance information.
$ lxc info named
Name: named
Status: RUNNING
Type: container
Architecture: aarch64
PID: 1191
Created: 2021/11/23 23:14 CET
Last Used: 2022/02/28 23:13 CET
Resources:
Processes: 23
CPU usage:
CPU usage (in seconds): 447
Memory usage:
Memory (current): 51.76MiB
Memory (peak): 109.51MiB
Network usage:
eth0:
Type: broadcast
State: UP
Host interface: vethb07caec0
MAC address: 00:16:3e:d8:bf:6e
MTU: 1500
Bytes received: 570.24kB
Bytes sent: 470.82kB
Packets received: 4369
Packets sent: 3723
IP addresses:
inet: 10.114.53.4/28 (global)
inet6: fe80::216:3eff:fed8:bf6e/64 (link)
lo:
Type: loopback
State: UP
MTU: 65536
Bytes received: 378B
Bytes sent: 378B
Packets received: 8
Packets sent: 8
IP addresses:
inet: 127.0.0.1/8 (local)
inet6: ::1/128 (local)
Display instance details using JSON format.
$ lxc list --format json | \ jq '.[] | select(.name=="named")'
{
"architecture": "aarch64",
"config": {
"image.architecture": "arm64",
"image.description": "Debian bullseye arm64 (20211123_05:24)",
"image.os": "Debian",
"image.release": "bullseye",
"image.serial": "20211123_05:24",
"image.type": "squashfs",
"image.variant": "default",
"volatile.base_image": "c998286a496ed66c99eb4023844a8c16017a560d15708c3b4491f79635bccd30",
"volatile.eth0.host_name": "vethb07caec0",
"volatile.eth0.hwaddr": "00:16:3e:d8:bf:6e",
"volatile.idmap.base": "0",
"volatile.idmap.current": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},{\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.idmap.next": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},{\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.last_state.idmap": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},{\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.last_state.power": "RUNNING",
"volatile.uuid": "d997c332-b2f6-4a6e-8bba-e9d2b4b0bacd"
},
"devices": {},
"ephemeral": false,
"profiles": [
"default"
],
"stateful": false,
"description": "",
"created_at": "2021-11-23T22:14:57.334549691Z",
"expanded_config": {
"image.architecture": "arm64",
"image.description": "Debian bullseye arm64 (20211123_05:24)",
"image.os": "Debian",
"image.release": "bullseye",
"image.serial": "20211123_05:24",
"image.type": "squashfs",
"image.variant": "default",
"volatile.base_image": "c998286a496ed66c99eb4023844a8c16017a560d15708c3b4491f79635bccd30",
"volatile.eth0.host_name": "vethb07caec0",
"volatile.eth0.hwaddr": "00:16:3e:d8:bf:6e",
"volatile.idmap.base": "0",
"volatile.idmap.current": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.idmap.next": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},{\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.last_state.idmap": "[{\"Isuid\":true,\"Isgid\":false,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000},{\"Isuid\":false,\"Isgid\":true,\"Hostid\":1000000,\"Nsid\":0,\"Maprange\":1000000000}]",
"volatile.last_state.power": "RUNNING",
"volatile.uuid": "d997c332-b2f6-4a6e-8bba-e9d2b4b0bacd"
},
"expanded_devices": {
"eth0": {
"name": "eth0",
"network": "lxdbr0",
"type": "nic"
},
"root": {
"path": "/",
"pool": "default",
"type": "disk"
}
},
"name": "named",
"status": "Running",
"status_code": 103,
"last_used_at": "2022-02-28T22:13:52.01463686Z",
"location": "none",
"type": "container",
"project": "default",
"backups": null,
"state": {
"status": "Running",
"status_code": 103,
"disk": {},
"memory": {
"usage": 54431744,
"usage_peak": 114831360,
"swap_usage": 0,
"swap_usage_peak": 0
},
"network": {
"eth0": {
"addresses": [
{
"family": "inet",
"address": "10.114.53.4",
"netmask": "28",
"scope": "global"
},
{
"family": "inet6",
"address": "fe80::216:3eff:fed8:bf6e",
"netmask": "64",
"scope": "link"
}
],
"counters": {
"bytes_received": 570238,
"bytes_sent": 470817,
"packets_received": 4369,
"packets_sent": 3723,
"errors_received": 0,
"errors_sent": 0,
"packets_dropped_outbound": 0,
"packets_dropped_inbound": 0
},
"hwaddr": "00:16:3e:d8:bf:6e",
"host_name": "vethb07caec0",
"mtu": 1500,
"state": "up",
"type": "broadcast"
},
"lo": {
"addresses": [
{
"family": "inet",
"address": "127.0.0.1",
"netmask": "8",
"scope": "local"
},
{
"family": "inet6",
"address": "::1",
"netmask": "128",
"scope": "local"
}
],
"counters": {
"bytes_received": 378,
"bytes_sent": 378,
"packets_received": 8,
"packets_sent": 8,
"errors_received": 0,
"errors_sent": 0,
"packets_dropped_outbound": 0,
"packets_dropped_inbound": 0
},
"hwaddr": "",
"host_name": "",
"mtu": 65536,
"state": "up",
"type": "loopback"
}
},
"pid": 1191,
"processes": 23,
"cpu": {
"usage": 447145798939
}
},
"snapshots": null
}
Extract basic instance information.
$ lxc list --format json | \ jq -r '.[] | "Name:\t\(.name)\nStatus:\t\(.state.status)\nType:\t\(.type)\nArch:\t\(.architecture)\n"'
Name: adguard Status: Running Type: container Arch: aarch64 Name: named Status: Running Type: container Arch: aarch64 Name: unbound Status: Running Type: container Arch: aarch64
Extract memory usage.
$ lxc list --format json | \ jq -r '.[] | "The \(.type) \(.name) is currently using \(.state.memory.usage/pow(1024;2)|floor) MiB of memory (up to \(.state.memory.usage_peak/pow(1024;2)|floor) MiB)"'
The container adguard is currently using 256 MiB of memory (up to 346 MiB) The container named is currently using 51 MiB of memory (up to 109 MiB) The container unbound is currently using 82 MiB of memory (up to 97 MiB)
Extract network information.
$ lxc list --format json | \ jq -r --arg int "eth0" '.[] | "\(.name) - \($int)\n Address: \(.state.network[$int].addresses[] |select(.family=="inet") | .address)\n Netmask: \(.state.network[$int].addresses[] |select(.family=="inet") | .netmask)\n Bytes sent: \(.state.network[$int].counters.bytes_sent)\n Bytes received: \(.state.network[$int].counters.bytes_received)\n"'
adguard - eth0 Address: 10.114.53.3 Netmask: 28 Bytes sent: 96454860 Bytes received: 136850048 named - eth0 Address: 10.114.53.4 Netmask: 28 Bytes sent: 471692 Bytes received: 571015 unbound - eth0 Address: 10.114.53.12 Netmask: 28 Bytes sent: 20706861 Bytes received: 39336137
Extract number of processes running inside specific instance.
$ lxc list --format json | \ jq -r --arg name "adguard" '.[] | select(.name == $name) | "There are \(.state.processes) processes running in \($name) \(.type)\n"'
There are 21 processes running in adguard container