Troubleshooting
Frequently asked questions
How can I ensure the fully qualified domain name (FQDN) is resolvable from within the Kubernetes cluster?
Create a pod named
debug-dns
and spawn an interactive shell.kubectl run debug-dns --stdin --tty --rm --image docker.io/rockylinux/rockylinux:9 -- sh
Install package
bind-utils
.dnf install bind-utils
Perform DNS lookups on a given FQDN.
dig <fqdn>
I'm unsure which Kubernetes namespace or Helm release is associated with my Immuta installation. How can I find this out?
helm list --all-namespaces --output json | jq '.[]|select(.chart | startswith("immuta"))'
I no longer have my immuta-values.yaml
Helm values file. How do I recover this file?
immuta-values.yaml
Helm values file. How do I recover this file?helm get values <release-name> > immuta-values.yaml
I don't want to keep passing option --namespace
every time I run a Helm command. How do I set a default?
--namespace
every time I run a Helm command. How do I set a default?kubectl config set-context --current --namespace=<name>
PostgreSQL
How do I determine if the database is accepting connections?
Create a pod named
debug-postgres
and spawn an interactive shell.kubectl run debug-postgres --stdin --tty --rm --image docker.io/bitnami/postgresql:latest -- sh
Validate that the database is listening.
pg_isready --host <postgres-fqdn> --port 5432
Redis
How can a TCP connection be established without using Redis CLI?
Create a pod named
debug-redis
and spawn an interactive shell.kubectl run debug-redis --stdin --tty --rm --image docker.io/rockylinux/rockylinux:9 -- sh
Send a raw TCP message to the database using Netcat.
nc -zv <redis-fqdn> 6379
How do I establish a TCP connection?
Create a pod named
debug-redis
and spawn an interactive shell.kubectl run debug-redis --stdin --tty --rm --image docker.io/bitnami/redis:latest -- sh
Establish a connection to the database using the Redis client. If a connection can be established with Netcat and the
redis-cli
command does not return, then Redis could be expecting a TLS connection. Pass option--tls
.redis-cli -h <redis-fqdn> -p 6379
Elasticsearch
How do I query the API using cURL?
Create a pod named
debug-elasticsearch
and spawn an interactive shell.kubectl run debug-elasticsearch --stdin --tty --rm --image docker.io/rockylinux/rockylinux:9 -- sh
Install package
curl
.dnf install curl
Check the cluster health.
curl --fail --request GET "http://<elasticsearch-fqdn>:9200/_cluster/health?pretty"
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