How To: Access IKS Cassandra PODS Terminal

These are my raw working notes, take a look at how record the information I need to answer questions I ask myself while learning Kubernetes. With good notes I can then easily copy paste the information and quickyl translate to markdown.

Links I used:

I can execute some commands to get Pod Names:

 ~ % ibmcloud ks worker ls --cluster mycluster-dal12-b3c.4x16
OK
ID                                                       Public IP      Private IP      Flavor               State    Status   Zone    Version   
kube-bvhjafed0aiosshvvo8g-myclusterda-default-000001bc   169.47.64.82   10.185.96.183   b3c.4x16.encrypted   normal   Ready    dal12   1.18.13_1536   
kube-bvhjafed0aiosshvvo8g-myclusterda-default-00000259   169.47.64.84   10.185.96.165   b3c.4x16.encrypted   normal   Ready    dal12   1.18.13_1536   
kube-bvhjafed0aiosshvvo8g-myclusterda-default-000003a0   169.47.64.86   10.185.96.186   b3c.4x16.encrypted   normal   Ready    dal12   1.18.13_1536 

 ~ % kubectl -n cass-operator get pods                                                                                        
NAME                             READY   STATUS    RESTARTS   AGE
cass-operator-557f6689df-qftdf   1/1     Running   0          14m
cluster1-dc1-default-sts-0       2/2     Running   0          11m
cluster1-dc1-default-sts-1       2/2     Running   0          11m
cluster1-dc1-default-sts-2       2/2     Running   0          11m

 ~ % kubectl -n cass-operator get pod cluster1-dc1-default-sts-0                                                         
NAME                         READY   STATUS    RESTARTS   AGE
cluster1-dc1-default-sts-0   2/2     Running   0          12m

I can use bash on the pod:

 ~ % kubectl -n cass-operator exec --stdin cluster1-dc1-default-sts-0 -- /bin/bash
Defaulting container name to cassandra.
Use 'kubectl describe pod/cluster1-dc1-default-sts-0 -n cass-operator' to see all of the containers in this pod.

the bash commands are limited
I can see the file system and find /config/cassandra.yaml but cannot edit

I can run nodetool status:

Datacenter: dc1
===============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving/Stopped
--  Address         Load       Tokens       Owns (effective)  Host ID                               Rack
UN  172.30.67.15    165.11 KiB  1            100.0%            49923960-3bb4-4aae-ae6e-19d1a9ff7809  default
UN  172.30.163.68   143.49 KiB  1            100.0%            133c50a9-df68-481b-8344-6a63140d5e57  default
UN  172.30.234.133  111.8 KiB  1            100.0%            e1ce2f35-90cb-4594-aa3b-b2ee2ed47860  default

I can run dsetool:

dsetool insights_config --show_config
{
  "mode" : "ENABLED_WITH_LOCAL_STORAGE",
  "config_refresh_interval_in_seconds" : 30,
  "metric_sampling_interval_in_seconds" : 30,
  "data_dir_max_size_in_mb" : 1024,
  "node_system_info_report_period" : "PT1H"
}

dsetool insights_filters
[simple commands]:
  --show_filters
  --remove_all_filters
[filtering actions]:
  --add
  --remove
  --allow
  --deny
  --global
  --insights_only
 <regex>

[examples]:
 insights_filters --add --global --deny .*KeyspaceMetrics.*
 insights_filters --add --insights_only --deny .*gc.*
 insights_filters --remove_all_filters

I can find metrics and log locations:

cd /var/lib/cassandra/insights_data
ls
insights

cd /var/log/cassandra
ls
audit
debug.log
dse-collectd.log
dse-collectd.pid
gc.log.0.current
gremlin.log
system.log

What’s Next?

Stay tuned to the Cass-Operator + IKS page as I complete exposing how to use the Datastax Cassandra Operator for Kubernetes on IBM Cloud IKS Platform.

How can I help you with Kubernetes?

SRM

Find me over on the DataStax Community to ask me any questions about Cassandra and Kubernetes. Also let’s chat if you have something kewl you did with Cassandra and Kubernetes and you want me to feature it in my blog. Look below or to the right for more ways to find me.

Cass-Operator + IKS Pod Access

How to access Cassandra Pods

How To: Access IKS Cassandra PODS Terminal

What’s Next?

How can I help you with Kubernetes?