K8s集群日志清理指的是清理Kubernetes集群中产生的日志文件,以节省存储空间和提高系统性能。在Kubernetes集群中,每个容器都会生成日志,如果不定期清理这些日志文件,会导致存储空间占用过大。下面我将为你介绍如何实现K8s集群日志清理的步骤和代码示例。

### 步骤
| 步骤 | 操作 |
|---|---|
| 1 | 部署Fluentd收集日志 |
| 2 | 设置Fluentd采集规则 |
| 3 | 使用CronJob定期清理日志 |

### 操作步骤及代码示例

#### 步骤一:部署Fluentd收集日志
首先我们需要部署Fluentd来收集Kubernetes集群中的日志。Fluentd是一个开源的数据收集器,可以接收Kubernetes集群中容器产生的日志。

```yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: fluentd
namespace: kube-system

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: fluentd
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- list
- watch

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: fluentd
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: fluentd
subjects:
- kind: ServiceAccount
name: fluentd
namespace: kube-system

---

apiVersion: apps/v1
kind: DaemonSet
metadata:
name: fluentd
namespace: kube-system
labels:
k8s-app: fluentd-logging
spec:
selector:
matchLabels:
name: fluentd
template:
metadata:
labels:
name: fluentd
spec:
containers:
- name: fluentd
image: fluent/fluentd
volumeMounts:
- name: varlog
mountPath: /var/log
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
volumes:
- name: varlog
hostPath:
path: /var/log
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
```

#### 步骤二:设置Fluentd采集规则
在Fluentd中设置采集规则,将采集到的日志发送到指定的存储位置,比如Elasticsearch、Splunk等。

```yaml

@type elasticsearch
host elasticsearch.default.svc.cluster.local
port 9200
index_name kubernetes

```

#### 步骤三:使用CronJob定期清理日志
通过在Kubernetes中创建CronJob来定期清理日志文件。

```yaml
apiVersion: batch/v1
kind: CronJob
metadata:
name: log-cleaner
spec:
schedule: "0 1 * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: log-cleaner
image: busybox
args:
- /bin/sh
- -c
- find /var/log/ -name "*.log" -mtime +7 -exec rm {} \;
restartPolicy: OnFailure
```

通过以上步骤和代码示例,你可以实现K8s集群日志清理的功能,并定期清理Kubernetes集群中产生的日志文件,提高系统性能和节省存储空间。希望对你有所帮助!