Issue to start coordinator

0
votes

I have install 3 arangodb servers. But i have always the same listening port 8529 no 8530 for coordinator so i cannot create a cluster.

tcp 0 0 0.0.0.0:8529 0.0.0.0:* LISTEN 13142/arangod

So when i try to create a cluster via the web interface, i have the following error

ERROR bootstrapping DB servers failed: Could not connect to 'tcp://10.0.0.18:8530' 'connect() failed with #111 - Connection refused'

How can i start and/or configure the corrdinator to have a listen on my servers?

Regards

1
arangodb

1 Answers

1
votes

Dispatcher based clusters

Please note that dispatcher based setups as you asked are intended for evaluation purposes only.

To start a cluster from the dispatcher webfrontend you need to configure all nodes to start the arangod daemon in dispatcher mode:

[cluster]
disable-dispatcher-kickstarter = no
disable-dispatcher-frontend = no

To start a cluster on a single machine you only need to install ArangoDB and reconfigure it once; it will then use the same installation to start the dispatcher and dbserver nodes.

One should know that the initial cluster startup may take a while.

Another side note is that authentication is not supported in this scenario, so you may need to turn it off.

You should now find the log output of the dbserver and coordinator instances under /var/log/arangodb/cluster/ so you can get the actual informations of what went wrong.

Script based cloud install clusters

A better way to get a cluster running in the cloud may be to use one of the scripts we prepared for Digital Ocean, Google Compute Engine, AWS or Azure.

ArangoDB Clusters based on Mesosphere DCOS

The currently recommended way of running an ArangoDB cluster is to use Mesosphere DCOS, as Max describes in these slides using some example configurations.

ArangoDB is an official Mesosphere partner and we offer an official DCOS subcommand to manage an ArangoDB Cluster on Mesosphere DCOS.

Mesosphere adds additional services on top of Mesos and eases management of the Mesos cluster via the dcos-cli.

If you want to use a raw Apache Mesos Cluster, you can use the Mesos framework directly to schedule the neccessary tasks to create ArangoDB cluster.

Meanwhile there is a better article about Running ArangoDB on DC/OS.