I tried to reproduce the issue following your steps.
What i did:
- created a docker container using the following command (see our docs)
docker run -d --name=netdata \
-p 19998:19999 \
-v netdatalib:/var/lib/netdata \
-v netdatacache:/var/cache/netdata \
-v /etc/passwd:/host/etc/passwd:ro \
-v /etc/group:/host/etc/group:ro \
-v /proc:/host/proc:ro \
-v /sys:/host/sys:ro \
-v /etc/os-release:/host/etc/os-release:ro \
--restart unless-stopped \
--cap-add SYS_PTRACE \
--security-opt apparmor=unconfined \
-e NETDATA_CLAIM_TOKEN=XXXX \
-e NETDATA_CLAIM_URL="https://app.netdata.cloud" \
-e NETDATA_CLAIM_ROOMS=XXXX \
my_netdata
I got my instance up and claimed.
- in order to change its hostname, i stoped and removed old instance and created a new one (
pay attention to -vin my prev command, it allows to persist database and claiming stuff on the host machine, so my new instance will be using it - Cloud see it as the same instance).
I executed same docker run ... command but added --hostname=my_docker_netdata0 \ (see our docs)
I get my instance up and i see it on the cloud. See the Node Name, it is changed to --hostname. No new unreachable nodes.
Claiming using env variables doesn’t work atm, i created a docker image from the PR that fixes it.
But changing hostname works, Cloud handles it.