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4. Add Istio service entry with details of the remote servers ( server service 03 and server service 04) to the cluster where the client is running (For ISTIO multi-cluster communication usage of SNI ports is mandatory at both ends on istio-ingressgateway)
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| Code Block | ||||||
|---|---|---|---|---|---|---|
| ||||||
#!/bin/bash COUNTER=0 while [ $COUNTER -lt 10 ]; do curl -v service01.bar.svc.cluster.local/headers sleep 2 done |
NOTE
...
-
...
Although
...
the
...
service
...
running
...
in
...
an external
...
cluster
...
can
...
be
...
accessed
...
by
...
following
...
the
...
steps
...
above,
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the
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failover
...
mechanism
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is
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not
...
yet
...
supported
...
by
...
ISTIO (Replicated control plane).
For this scenario, the intent must have the following istio configurations
| Cluster | Istio configuration |
|---|---|
| cluster 01 | a. serviceEntry - of service serverservice04 as shown in step 4 b. virtualservice - having entries of serverservice04 (in cluster 02), serverservice01 (cluster 01) and serverservice02 (cluster 01) as shown in step 5 c. configmap - to add stubdomain .global in the coreDNS d. destinationRule - for any restrictions/loadbalancing amongst internal services/hosts |
| cluster 02 | a. configmap - to add stubdomain .global in the coreDNS b. destinationRule - for any restrictions/loadbalancing amongst internal services/hosts |
IN PROGRESS......