Build ./configure make -j bear -- make -j table lock error Basically, it means a write lock is already held on a table, and you want to get a read/write lock again. See the special check for re...

After Kibana installation, we should do three things Set up an index management policy. Create an index template and associate the index management policy with it. Also enable data stream. ...

Logstash is a pipeline for data ingesting, filtering and transformation. It is written using JRuby and Java. So It is quite a headache to navigate between Ruby code and Java code. In Logstash, ther...

vector is a combination of filebeat and logstash. VRL syntax See blog https://vector.dev/guides/level-up/transformation/ The . acts as a sort of “container” for the event data. . by itself re...

Filebeat is probably the most popular beat of all the beats provided by Elastic. The repo is very large containing over 1M+ lines of code. I will gradually add learning notes about this repo. Metr...

Memory Resource Controller When you exec into a k8s pod, you will find a lot of files under /sys/fs/cgroup/memory. root@kafka-all-in-one-consumer-7567f685c4-8wv8x:/sys/fs/cgroup/memory# ls -l tot...

Envoy is a proxy solution. There are so many proxies in the market: nginx, haproxy, trafik and etc, but why does Envoy stand out? It is because the xDS APIs, or a fancier name, xDS protocol. Envoy ...

Istio used to have a micro-service architecture. However, starting from v1.5, It moved back to a monolithic architecture. This largely simplifies the management of Istio. After v1.5, we only need t...

The purpose of vacuum: recover disk space. Update planner statistics Prevent transaction id wraparound failure how dd dashboard show low row count after failover ...

Jenkins has a master-agent architecture. Agent, i.e., worker is also called “node” in Jenkins terminology. Master distributes jobs to agents. Agent vs inbound agent You may wonder why there are t...