在 Kusto 中解析 `key1=value1 key2=value2`

Question

我是运行 Azure Kubernetes 集群中的 Cilium，我想解析 Azure Log Analytics 中的 Cilium 日志消息。日志消息的格式类似于

key1=value1 key2=value2 key3="if the value contains spaces, it's wrapped in quotation marks"

例如：

level=info msg="Identity of endpoint changed" containerID=a4566a3e5f datapathPolicyRevision=0

我在文档中找不到匹配的 parse_xxx 方法（例如 https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/parsecsvfunction ）。是否可以编写自定义函数来解析此类日志消息？

Answer 1

不是一种有趣的解析格式...但这应该有效：

let LogLine = "level=info msg=\"Identity of endpoint changed\" containerID=a4566a3e5f datapathPolicyRevision=0";
print LogLine
| extend KeyValuePairs = array_concat(
    extract_all("([a-zA-Z_]+)=([a-zA-Z0-9_]+)", LogLine),
    extract_all("([a-zA-Z_]+)=\"([a-zA-Z0-9_ ]+)\"", LogLine))
| mv-apply KeyValuePairs on 
(
    extend p = pack(tostring(KeyValuePairs[0]), tostring(KeyValuePairs[1]))
    | summarize dict=make_bag(p)
)

输出将是：

| print_0            | dict                                    |
|--------------------|-----------------------------------------|
| level=info msg=... | {                                       |
|                    |   "level": "info",                      |
|                    |   "containerID": "a4566a3e5f",          |
|                    |   "datapathPolicyRevision": "0",        |
|                    |   "msg": "Identity of endpoint changed" |
|                    | }                                       |
|--------------------|-----------------------------------------|

Answer 2

在 Slavik N 的帮助下，我提出了一个适合我的查询：

let containerIds = KubePodInventory
| where Namespace startswith "cilium"
| distinct ContainerID
| summarize make_set(ContainerID);
ContainerLog
| where ContainerID in (containerIds)
| extend KeyValuePairs = array_concat(
    extract_all("([a-zA-Z0-9_-]+)=([^ \"]+)", LogEntry),
    extract_all("([a-zA-Z0-9_]+)=\"([^\"]+)\"", LogEntry))
| mv-apply KeyValuePairs on 
(
    extend p = pack(tostring(KeyValuePairs[0]), tostring(KeyValuePairs[1]))
    | summarize JSONKeyValuePairs=parse_json(make_bag(p))
)
| project TimeGenerated, Level=JSONKeyValuePairs.level, Message=JSONKeyValuePairs.msg, PodName=JSONKeyValuePairs.k8sPodName, Reason=JSONKeyValuePairs.reason, Controller=JSONKeyValuePairs.controller, ContainerID=JSONKeyValuePairs.containerID, Labels=JSONKeyValuePairs.labels, Raw=LogEntry

在 Kusto 中解析 `key1=value1 key2=value2`

Parse `key1=value1 key2=value2` in Kusto

azure

azure-log-analytics

cilium

azure-data-explorer