In the SigNoz version >=v0.23 i.e. SigNoz chart version >=0.19.0, altinity/clickhouse-operator is upgraded from version v0.19.1 to v0.21.2.
This upgrade brings a lot of improvements in the ClickHouse cluster management with the updated operator. It resolves the previously seen Out of Sync issue of ArgoCD. Henceforth, official support for ArgoCD by SigNoz is added.
No special steps are required for Docker Standalone and Docker Swarm deployments.
Steps to Upgrade
In order for keeping the ClickHouse Operator and ClickHouse cluster in sync, please run the following commands before upgrading SigNoz chart to >=v0.19.0.
SIGNOZ_CHART_VERSION="0.19.0"
kubectl apply \
-f https://github.com/SigNoz/charts/raw/signoz-${SIGNOZ_CHART_VERSION}/charts/clickhouse/crds/clickhouseinstallations.clickhouse.altinity.com.yaml \
-f https://github.com/SigNoz/charts/raw/signoz-${SIGNOZ_CHART_VERSION}/charts/clickhouse/crds/clickhouseinstallationtemplates.clickhouse.altinity.com.yaml \
-f https://github.com/SigNoz/charts/raw/signoz-${SIGNOZ_CHART_VERSION}/charts/clickhouse/crds/clickhouseoperatorconfigurations.clickhouse.altinity.com.yaml
You may see a warning like below:
Warning: resource customresourcedefinitions/clickhouseinstallations.clickhouse.altinity.com is missing the kubectl.kubernetes.io/last-applied-configuration annotation which is required by kubectl apply. kubectl apply should only be used on resources created declaratively by either kubectl create --save-config or kubectl apply. The missing annotation will be patched automatically.
customresourcedefinition.apiextensions.k8s.io/clickhouseinstallations.clickhouse.altinity.com configured
Warning: resource customresourcedefinitions/clickhouseinstallationtemplates.clickhouse.altinity.com is missing the kubectl.kubernetes.io/last-applied-configuration annotation which is required by kubectl apply. kubectl apply should only be used on resources created declaratively by either kubectl create --save-config or kubectl apply. The missing annotation will be patched automatically.
customresourcedefinition.apiextensions.k8s.io/clickhouseinstallationtemplates.clickhouse.altinity.com configured
Warning: resource customresourcedefinitions/clickhouseoperatorconfigurations.clickhouse.altinity.com is missing the kubectl.kubernetes.io/last-applied-configuration annotation which is required by kubectl apply. kubectl apply should only be used on resources created declaratively by either kubectl create --save-config or kubectl apply. The missing annotation will be patched automatically.
customresourcedefinition.apiextensions.k8s.io/clickhouseoperatorconfigurations.clickhouse.altinity.com configured
This is expected and you can safely ignore it.
Upgrade to v0.23
Now, you proceed with the upgrade to >=v0.23 as per the usual instructions for Kubernetes
If you had single node ClickHouse cluster, you might see some downtime during the upgrade. This is because the ClickHouse cluster is recreated with the new operator. The downtime is usually less than 5 minutes.
However, telemetry data should be queued and ingested once the ClickHouse cluster is up.