OpenShift 4 - 为 Etcd 数据库整理碎片

dawnsky.liu

485人浏览 · 2023-01-14 20:45:27

dawnsky.liu · 2023-01-14 20:45:27 发布

《OpenShift 4.x HOL教程汇总》
说明：本文已经在 OpenShift 4.12 集群和 OpenShift Local 环境中验证，以下以 OpenShift Local 为例。

查看在 openshift-etcd 中运行 etcd 的 Pod，

$ oc get pod -n openshift-etcd
NAME                      READY   STATUS    RESTARTS   AGE
etcd-crc-pbwlw-master-0   5/5     Running   0          38d
 
$ oc rsh  -n openshift-etcd etcd-crc-pbwlw-master-0
Defaulted container "etcdctl" out of: etcdctl, etcd, etcd-metrics, etcd-health-monitor, etcd-readyz, setup (init), etcd-ensure-env-vars (init), etcd-resources-copy (init)

执行命令查看当前 etcd 数据库实例的 DB SIZE。

sh-4.4# etcdctl endpoint status -w table --cluster
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|          ENDPOINT           |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://192.168.126.11:2379 | 5c468d7f95fd92ea |   3.5.5 |  107 MB |      true |      false |         8 |      93413 |              93413 |        |
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+

执行命令整理 etcd 数据库实例碎片。

sh-4.4# unset ETCDCTL_ENDPOINTS
sh-4.4# etcdctl --command-timeout=30s --endpoints=https://localhost:2379 defrag
Finished defragmenting etcd member[https://localhost:2379]

再次查看当前 etcd 数据库实例的 DB SIZE，确认已经变小了。

sh-4.4# etcdctl endpoint status -w table --cluster
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|          ENDPOINT           |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://192.168.126.11:2379 | 5c468d7f95fd92ea |   3.5.5 |   52 MB |      true |      false |         8 |      95472 |              95472 |        |
+-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+