opscenter

问题 Using OpsCenter 5.1.0 and trying to add S3 as a location for snapshot backups. What are the necessary permissions in AWS IAM for the opscenter user? So far, I have the following policy: "Statement": [ { "Effect": "Allow", "Action": [ "s3:ListAllMyBuckets", "s3:GetBucketLocation" ], "Resource": "arn:aws:s3:::*" }, { "Effect": "Allow", "Action": [ "s3:ListBucket", "s3:GetBucketLocation" ], "Resource": [ "arn:aws:s3:::cassandra-bkup" ] }, { "Effect": "Allow", "Action": [ "s3:DeleteObject", "s3

问题 I created an Apache Cassandra 2.1.2 cluster of 50 nodes. I named the cluster as "Test Cluster", the default. Then for some testing, I separated one node out of the 50 node cluster. I shut down Cassandra, deleted data dirs, flushed nodetool. Then I edited the single node cluster and called it as "Single Node Test Cluster" I edited seeds, cluster_name and listen_address fields appropriately. I also setup JMX correctly. Now here is what happens. 1. When I run nodetool status on the single node,

问题 I am trying to duplicate data in a cassandra nosql database for a school project using datastax ops center. From what I have read, there is three keywords: cluster, node, and datacenter, and from what I have understand, the data in a node can be duplicated in another node, that exists in another cluster. And all the nodes that contains the same (duplicated) data compose a datacenter. Is that right? If it is not, what is the difference? 回答1: The hierarchy of elements in Cassandra is: Cluster

问题 Update 2 There was a bug in Opscenter not matching dsc22 configuration with cassandra community version, this solved one problem. Update After reading the opscenter log again I think there actually something wrong with the 4 authentication fields or some ssh configuration, but I still don't know what exactly should be done, The field says "Local node credentials (sudo) private key (optional) the scenario is as following: I installed 4 nodes with vagrant and ansible where each has dsc22

问题 Trying to get OpsCenter 5.2.2 after fresh install to pick up data from two new clusters. Both cluster are freshly installed and runs fine: [root@d1r1n1 ~]# metatool status Note: Ownership information does not include topology; for complete information, specify a keyspace Datacenter: OPA3 ================ Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host ID Rack UN 10.45.68.13 136.01 KB 1 7.1% 692e6062-388d-49f4-93de-380405e1495f R3.3.16 UN 10.45.68.12 150

问题 I upgraded Opscenter from 5.1.2 to 5.2.0 yesterday, and now none of the graphs on the Dashboard are showing any statistics. My cluster is datastax enterprise 4.5.1 with the following versions: cqlsh 4.1.1 | Cassandra 2.0.8.39 | CQL spec 3.1.1 | Thrift protocol 19.39.0 I'm using this cluster for a search workload with solr. The agent.log is filled with the following: INFO [qtp1313948736-24] 2015-08-06 12:30:52,211 New JMX connection (127.0.0.1:7199) INFO [qtp1313948736-24] 2015-08-06 12:30:52

问题 I am unable to connect to any nodes through opscenter. In opscenter it says that agents need to be connected inorder for opscenter to work. I checked in datastax-agent/agent.log file and found below errors. ERROR [clojure-agent-send-off-pool-0] 2016-01-27 09:30:54,545 Can't connect to Cassandra (All host(s) tried for query failed (tried: /127.0.0.1:9042 (com.datastax.driver.core.TransportException: [/127.0.0.1:9042] Cannot connect))), retrying soon. I checked port 9042 and 7199 both are

问题 I am unable to connect to any nodes through opscenter. In opscenter it says that agents need to be connected inorder for opscenter to work. I checked in datastax-agent/agent.log file and found below errors. ERROR [clojure-agent-send-off-pool-0] 2016-01-27 09:30:54,545 Can't connect to Cassandra (All host(s) tried for query failed (tried: /127.0.0.1:9042 (com.datastax.driver.core.TransportException: [/127.0.0.1:9042] Cannot connect))), retrying soon. I checked port 9042 and 7199 both are

问题 I upgraded OpsCenter from 6.0.3 to 6.0.5. Is there a way to migrate the LCM data? Is it as simple as copying the file lcm.db? Thanks. 回答1: OpsCenter developer here. 6.0.3 to 6.0.5 is a safe upgrade to do "in-place". So if it's a package you can just 'yum upgrade' or 'apt-get upgrade'. If you do want to backup/restore your settings for whatever reason, the best docs to look at are our high-availability docs (HA failover is basically a backup/restore): https://docs.datastax.com/en/opscenter/6.0

问题 When I start OpsCenter, I get following error message: File "build/lib/python2.6/site-packages/opscenterd/Definitions.py", line 271, in updateFiles File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/internet/defer.py", line 1018, in _inlineCallbacks result = result.throwExceptionIntoGenerator(g) File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/python/failure.py", line 349, in throwExceptionIntoGenerator return g.throw(self.type, self.value, self.tb) File "build