Often this is caused by the agent version not matching the OpsCenter version. Unfortunately the UI currently reports a version mismatch as 'not installed'. Can you check the versions of your OpsCenter and agent installs?
On Tue, Dec 2, 2014 at 5:06 PM, Nikolai Grigoriev <ngrigor...@gmail.com> wrote: > I have observed this kind of situation with 0 agents connected. Restarting > the agents always helped so far. By the way, check the agent's logs and > opscenterd logs, there may be some clues there. > > On Tue, Dec 2, 2014 at 4:59 PM, Ian Rose <ianr...@fullstory.com> wrote: > >> Hi all - >> >> Just getting started setting up OpsCenter today. I have a 3 node >> cassandra cluster and (afaict) the agent installed and running happily on >> all 3 nodes. I also have OpsCenter up and running on a 4th node. I do not >> have SSL enabled between these nodes. >> >> In the OpsCenter interface, I see "0 of 0 agents connected" and >> restarting OpsCenter does not change this. However, in my cluster settings >> I have the following entered for the "least one host / IP in the cluster" >> portion, and these hostnames are all resolvable/pingable from the OpsCenter >> machine. >> >> cassandra-db-1 >> cassandra-db-2 >> cassandra-db-3 >> >> Also, from this post >> <http://www.datastax.com/support-forums/topic/agents-running-without-error-but-not-connecting-to-opscenter> >> I >> found a suggestion to curl <cluster>/nodes/all and when I do that I (think >> I) get results showing 3 nodes. >> >> Any suggestions? Thanks! >> - Ian >> >> >> curl http://localhost:8888/FullStory/nodes/all >> >> >> [{"load": 0.0, "has_jna": false, "vnodes": true, "devices": >> {"saved_caches": "sdb", "commitlog": "sdb", "other": ["sda"], "data": >> ["sdb"]}, "task_progress": {}, "node_ip": "10.240.167.187", >> "network_interfaces": ["eth0", "lo"], "ec2": {"instance-type": null, >> "placement": null, "ami-id": null, "instance-id": null}, "node_version": >> {"search": null, "jobtracker": null, "tasktracker": null, "spark": >> {"master": null, "version": null, "worker": null}, "dse": null, >> "cassandra": "2.0.9"}, "dc": "us-central1", "node_name": >> "cassandra-db-3.c.fs-staging.internal", "num_procs": 1, "streaming": {}, >> "token": "-3220529141950148793", "data_held": 54064133.0, "mode": "normal", >> "rpc_ip": "10.240.167.187", "partitions": {"saved_caches": "/dev/sdb", >> "commitlog": "/dev/sdb", "other": >> ["/dev/disk/by_uuid/121fd70f_e625_4394_89ce_5e5eff3d25e0", "rootfs"], >> "data": ["/dev/sdb"]}, "os": "linux", "rack": "f", "last_seen": 0}, >> {"load": 0.0, "has_jna": false, "vnodes": true, "devices": {"saved_caches": >> "sdb", "commitlog": "sdb", "other": ["sda"], "data": ["sdb"]}, >> "task_progress": {}, "node_ip": "10.240.111.79", "network_interfaces": >> ["eth0", "lo"], "ec2": {"instance-type": null, "placement": null, "ami-id": >> null, "instance-id": null}, "node_version": {"search": null, "jobtracker": >> null, "tasktracker": null, "spark": {"master": null, "version": null, >> "worker": null}, "dse": null, "cassandra": "2.0.9"}, "dc": "us-central1", >> "node_name": "cassandra-db-1.c.fs-staging.internal", "num_procs": 1, >> "streaming": {}, "token": "6048217978730786970", "data_held": 54319361.0, >> "mode": "normal", "rpc_ip": "10.240.111.79", "partitions": {"saved_caches": >> "/dev/sdb", "commitlog": "/dev/sdb", "other": >> ["/dev/disk/by_uuid/2795e34f_4e9b_46a9_9e39_e6cc0f1f1478", "rootfs"], >> "data": ["/dev/sdb"]}, "os": "linux", "rack": "a", "last_seen": 0}, >> {"load": 0.04, "has_jna": false, "vnodes": true, "devices": >> {"saved_caches": "sdb", "commitlog": "sdb", "other": ["sda"], "data": >> ["sdb"]}, "task_progress": {}, "node_ip": "10.240.129.185", >> "network_interfaces": ["eth0", "lo"], "ec2": {"instance-type": null, >> "placement": null, "ami-id": null, "instance-id": null}, "node_version": >> {"search": null, "jobtracker": null, "tasktracker": null, "spark": >> {"master": null, "version": null, "worker": null}, "dse": null, >> "cassandra": "2.0.9"}, "dc": "us-central1", "node_name": >> "cassandra-db-2.c.fs-staging.internal", "num_procs": 1, "streaming": {}, >> "token": "4393271482730462700", "data_held": 51388793.0, "mode": "normal", >> "rpc_ip": "10.240.129.185", "partitions": {"saved_caches": "/dev/sdb", >> "commitlog": "/dev/sdb", "other": >> ["/dev/disk/by_uuid/2795e34f_4e9b_46a9_9e39_e6cc0f1f1478", "rootfs"], >> "data": ["/dev/sdb"]}, "os": "linux", "rack": "b", "last_seen": 0}] >> > > > > -- > Nikolai Grigoriev > (514) 772-5178 >
