CoreDNS
Collect logs from CoreDNS instances with Elastic Agent.
Version | 0.9.0 (View all) |
Compatible Kibana version(s) | 8.13.0 or higher |
Supported Serverless project types | Security Observability |
Subscription level | Basic |
Level of support | Elastic |
This integration parses logs from CoreDNS instances.
Compatibility
This integration is designed to read CoreDNS logs running within a Kubernetes cluster or via systemd with logs output to journald. The CoreDNS datasets were tested with version 1.9.3 and 1.10.0.
Logs
The log data stream expects logs from the CoreDNS errors plugin and the log plugin. Query logs from the log plugin can be in either the common or combined format (see log format for details).
An example configuration with logging enabled is:
. {
forward . 8.8.8.8
errors
log
}ECS Field Reference
Please refer to the following document for detailed information on ECS fields.
Exported fields
| Field | Description | Type |
|---|---|---|
@timestamp | Event timestamp. | date |
cloud.image.id | Image ID for the cloud instance. | keyword |
coredns.log.buffer_size | The EDNS0 buffer size advertised in the query | long |
coredns.log.dnssec_ok | The DO bit is included in a DNS query and is an abbreviation for "DNSSEC OK". If the DO bit is set (DO=1), then the client is DNSSEC-aware, and it is OK for the DNS server to return DNSSEC data in a response. If the DO bit is not set (DO=0), then the client is not DNSSEC-aware, and the DNS server must not include any DNSSEC data in a DNS response. | boolean |
coredns.log.error.message | The error message | text |
data_stream.dataset | Data stream dataset. | constant_keyword |
data_stream.namespace | Data stream namespace. | constant_keyword |
data_stream.type | Data stream type. | constant_keyword |
event.dataset | Event dataset | constant_keyword |
event.module | Event module | constant_keyword |
host.containerized | If the host is a container. | boolean |
host.os.build | OS build information. | keyword |
host.os.codename | OS codename, if any. | keyword |
input.type | Input type | keyword |
kubernetes.container.name | Kubernetes container name | keyword |
kubernetes.labels.* | Kubernetes labels map | object |
kubernetes.namespace | Kubernetes namespace | keyword |
kubernetes.node.name | Kubernetes node name | keyword |
kubernetes.pod.name | Kubernetes pod name | keyword |
kubernetes.pod.uid | Kubernetes pod UID | keyword |
kubernetes.replicaset.name | Kubernetes replicaset name | keyword |
log.file.device_id | ID of the device containing the filesystem where the file resides. | keyword |
log.file.fingerprint | The sha256 fingerprint identity of the file when fingerprinting is enabled. | keyword |
log.file.idxhi | The high-order part of a unique identifier that is associated with a file. (Windows-only) | keyword |
log.file.idxlo | The low-order part of a unique identifier that is associated with a file. (Windows-only) | keyword |
log.file.inode | Inode number of the log file. | keyword |
log.file.vol | The serial number of the volume that contains a file. (Windows-only) | keyword |
log.offset | Log offset | long |
An example event for log looks as following:
{
"@timestamp": "2023-09-27T18:59:58.096Z",
"agent": {
"ephemeral_id": "bbb180b6-3756-4f5b-81d5-6e333e740796",
"id": "86a82f91-ff66-4d28-ab7c-eb9350f317ed",
"name": "docker-fleet-agent",
"type": "filebeat",
"version": "8.10.1"
},
"coredns": {
"log": {
"buffer_size": 1232,
"dnssec_ok": false
}
},
"data_stream": {
"dataset": "coredns.log",
"namespace": "ep",
"type": "logs"
},
"destination": {
"bytes": 65
},
"dns": {
"header_flags": [
"RD",
"RA"
],
"id": "58521",
"question": {
"class": "IN",
"name": "google.com",
"registered_domain": "google.com",
"top_level_domain": "com",
"type": "A"
},
"response_code": "NOERROR"
},
"ecs": {
"version": "8.11.0"
},
"elastic_agent": {
"id": "86a82f91-ff66-4d28-ab7c-eb9350f317ed",
"snapshot": false,
"version": "8.10.1"
},
"event": {
"agent_id_status": "verified",
"category": [
"network"
],
"created": "2023-09-27T18:59:58.096Z",
"dataset": "coredns.log",
"duration": 32133957.999999996,
"ingested": "2023-09-27T18:59:59Z",
"kind": "event",
"original": "[INFO] 192.168.112.3:45632 - 58521 \"A IN google.com. udp 51 false 1232\" NOERROR qr,rd,ra 65 0.032133958s",
"outcome": "success",
"type": [
"protocol"
]
},
"host": {
"architecture": "aarch64",
"containerized": false,
"hostname": "docker-fleet-agent",
"id": "ddbe644fa129402e9d5cf6452db1422d",
"ip": [
"172.31.0.7"
],
"mac": [
"02-42-AC-1F-00-07"
],
"name": "docker-fleet-agent",
"os": {
"codename": "focal",
"family": "debian",
"kernel": "5.15.49-linuxkit",
"name": "Ubuntu",
"platform": "ubuntu",
"type": "linux",
"version": "20.04.6 LTS (Focal Fossa)"
}
},
"input": {
"type": "filestream"
},
"log": {
"file": {
"device_id": 141,
"inode": 18614042,
"path": "/tmp/service_logs/coredns.log"
},
"level": "info",
"offset": 67
},
"network": {
"bytes": 116,
"iana_number": "17",
"protocol": "dns",
"transport": "udp"
},
"related": {
"hosts": [
"google.com"
],
"ip": [
"192.168.112.3"
]
},
"source": {
"address": "192.168.112.3",
"bytes": 51,
"ip": "192.168.112.3",
"port": 45632
},
"tags": [
"preserve_original_event",
"coredns-log"
]
}Changelog
| Version | Details | Kibana version(s) |
|---|---|---|
0.9.0 | Enhancement View pull request | — |
0.8.0 | Enhancement View pull request | — |
0.7.0 | Enhancement View pull request | — |
0.6.1 | Bug fix View pull request | — |
0.6.0 | Enhancement View pull request | — |
0.5.0 | Enhancement View pull request | — |
0.4.0 | Enhancement View pull request | — |
0.3.0 | Enhancement View pull request | — |
0.2.2 | Bug fix View pull request | — |
0.2.1 | Enhancement View pull request | — |
0.2.0 | Enhancement View pull request | — |
0.1.0 | Enhancement View pull request | — |