leadnodes unable to lookup for host and no such host

[Choongzai]

hi, anyone can help me, i have faced a problem of no such host error when i follow the setup on the read.me of the command kubectl apply -f https://raw.githubusercontent.com/nats-io/k8s/master/nats-server/nats-js-leaf.yml

[8] 2021/08/19 11:14:52.225665 [INF] Starting nats-server
[8] 2021/08/19 11:14:52.225707 [INF] Version: 2.3.5-beta.2
[8] 2021/08/19 11:14:52.225711 [INF] Git: [a5afa867]
[8] 2021/08/19 11:14:52.225723 [INF] Name: NBLIEZQN6UJEWD6Y7BJILKGCXSMW7YB7O72MM5VH3UTABMRDQGK3QECF
[8] 2021/08/19 11:14:52.225729 [INF] Node: ciFh09UR
[8] 2021/08/19 11:14:52.225732 [INF] ID: NBLIEZQN6UJEWD6Y7BJILKGCXSMW7YB7O72MM5VH3UTABMRDQGK3QECF
[8] 2021/08/19 11:14:52.225742 [INF] Using configuration file: /etc/nats-config/nats.conf
[8] 2021/08/19 11:14:52.227071 [INF] Starting JetStream
[8] 2021/08/19 11:14:52.229306 [INF] _ ___ _____ ___ _____ ___ ___ _ __ __
[8] 2021/08/19 11:14:52.229319 [INF] _ | | | / | | _ \ __| /\ | / |
[8] 2021/08/19 11:14:52.229322 [INF] | || | | | | _ \ | | | / | / _ | |/| |
[8] 2021/08/19 11:14:52.229324 [INF] _/|| || |/ || ||___// __| |_|
[8] 2021/08/19 11:14:52.229326 [INF]
[8] 2021/08/19 11:14:52.229329 [INF] https://docs.nats.io/jetstream
[8] 2021/08/19 11:14:52.229332 [INF]
[8] 2021/08/19 11:14:52.229334 [INF] ---------------- JETSTREAM ----------------
[8] 2021/08/19 11:14:52.229343 [INF] Max Memory: 5.46 GB
[8] 2021/08/19 11:14:52.229347 [INF] Max Storage: 953.67 MB
[8] 2021/08/19 11:14:52.229350 [INF] Store Directory: "/data/jetstream/store/jetstream"
[8] 2021/08/19 11:14:52.229353 [INF] -------------------------------------------
[8] 2021/08/19 11:14:52.230023 [INF] Starting http monitor on 0.0.0.0:8222
[8] 2021/08/19 11:14:52.230096 [INF] Listening for leafnode connections on 0.0.0.0:7422
[8] 2021/08/19 11:14:52.230808 [INF] Listening for client connections on 0.0.0.0:4222
[8] 2021/08/19 11:14:52.230943 [INF] Server is ready
[8] 2021/08/19 11:14:52.244034 [ERR] Error trying to connect as leafnode to remote server "nats-js:7422" (attempt 1): lookup for host "nats-js": lookup nats-js on 10.0.0.10:53: no such host

[tomaszstachera]

I had similar issue. In my case it was because if you change release name (Helm) it changes SVC name and you need to adjust it in the nats url : --set jetstream.nats.url=nats://nats:4222 => --set jetstream.nats.url=<release-name>://<release-name>:4222