我正在使用airflow helm chart在k8s上运行气流。但是，Web pod似乎无法连接到postgresql。奇怪的是，其他豆荚也可以。
我整理了一些小脚本进行检查，这就是我发现的内容：
[root@ip-10-56-173-248 bin]# cat checkpostgres.sh
docker exec -u root $1 /bin/nc -zvw2 airflow-postgresql 5432
[root@ip-10-56-173-248 bin]# docker ps --format '{{.Names}}\t{{.ID}}'|grep k8s_airflow|grep default|awk '{printf("%s ",$1); system("checkpostgres.sh " $2)}'
k8s_airflow-web_airflow-web-57c6dcd77b-dvjmv_default_67d74586-284b-11ea-8021-0249931777ef_74 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (postgresql) : Connection timed out
k8s_airflow-worker_airflow-worker-0_default_67e1703a-284b-11ea-8021-0249931777ef_0 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (postgresql) open
k8s_airflow-scheduler_airflow-scheduler-5d9b688ccf-zdjdl_default_67d3fab4-284b-11ea-8021-0249931777ef_0 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (postgresql) open
k8s_airflow-postgresql_airflow-postgresql-76c954bb7f-gwq68_default_67d1cf3d-284b-11ea-8021-0249931777ef_0 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (postgresql) open
k8s_airflow-redis_airflow-redis-master-0_default_67d9aa36-284b-11ea-8021-0249931777ef_0 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (?) open
k8s_airflow-flower_airflow-flower-79c999764d-d4q58_default_67d267e2-284b-11ea-8021-0249931777ef_0 airflow-postgresql.default.svc.cluster.local [172.20.166.209] 5432 (postgresql) open
这是我的k8s版本信息：
➜ ~ kubectl version
Client Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.8", GitCommit:"211047e9a1922595eaa3a1127ed365e9299a6c23", GitTreeState:"clean", BuildDate:"2019-10-15T12:11:03Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"14+", GitVersion:"v1.14.9-eks-c0eccc", GitCommit:"c0eccca51d7500bb03b2f163dd8d534ffeb2f7a2", GitTreeState:"clean", BuildDate:"2019-12-22T23:14:11Z", GoVersion:"go1.12.12", Compiler:"gc", Platform:"linux/amd64"}
当我对Pod名称执行nslookup时，它似乎工作正常：
# nslookup airflow-postgresql
Server: 172.20.0.10
Address: 172.20.0.10#53
Non-authoritative answer:
Name: airflow-postgresql.default.svc.cluster.local
Address: 172.20.166.209
什么会导致此行为\我还能检查些什么来缩小此范围？