858 questions
3
votes
1
answer
98
views
Downscaling AWS RDS Aurora-MySQL instances
We use Terraform to manage AWS resources. I recently downscaled RDS Aurora-MySql8 cluster (one reader, one writer in different AZ) from r5 to t3 instances. I try to figure out from AWS event logs ...
- 1,843
0
votes
0
answers
93
views
Is failover in DestinationRule necessary when localityLbSetting is enabled in Istio?
Let’s assume I have two regions: a and b, and my DestinationRule looks like this:
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: sample
spec:
host: sample.default....
- 123
1
vote
1
answer
128
views
Kafka stream message processing semantics
I am designing a Kafka stream app and want to know few details in order to design my failover strategy. I tried reading Kafka stream doc and existing stackoverflow posts, but was unable to find the ...
- 385
0
votes
1
answer
298
views
how does postgres pg_rewind work internally
Are my assumptions correct regarding the pg_rewind?
Using the specific terminology from pg_rewind documentation to describe
source (new primary)
target (old primary)
pg_rewind only needs the timeline ...
0
votes
0
answers
38
views
Issue in call command during switchover mariadb
I am trying to execute below command in maxscale pod mariadb:
Where mariadb-server-0 mariadb-server-1 are secondary and primary servers and servermon is the module name and mariadbmon-monitor is ...
- 259
0
votes
1
answer
96
views
Failover oracle configuration in Spring boot project
I am using oracle database for my spring boot project, I have two database on server A and B, the A server has the primary database while the other is the standby database. The database on server A ...
- 13
0
votes
1
answer
33
views
Auto Connect to Primary Database from Spring Boot
I have a FDNS(mydbfdns.example.com) defined which has two Database servers A and B under it(Primary and StandBy) and resolves to Primary Database (A) and same is been used in the Spring Boot ...
- 5
0
votes
1
answer
67
views
Connecting K8s and Nomad using a single Consul Server (DC1). Is this even possible or what is the next best way to do so?
Currently I have setup K8s cluster, Nomad cluster and a consul server outside of both of them. I also have an assumption that these clusters are owned by different teams / stakeholders hence, they ...
- 37
0
votes
1
answer
165
views
R2DBC MariaDB failover in Spring Boot 3
I want to perform a failover setup for r2dbc mariadb. We are using spring boot 3. I have read in some documents that from spring boot 3 it supports these behaviours.
I am expecting something like ...
1
vote
1
answer
141
views
ZeroMQ Binary Star pattern ( for high availability )
Reading the ZeroMQ Guide I stumbled upon some part of the text that I don't understand very well. This is in Chapter 4, Reliable Request-Reply Patterns, specifically Binary Star pattern.
A suitably ...
- 91
1
vote
1
answer
69
views
System design - Server sends request but goes down, does it receive response
I have the below basic design for my service.
Flow:
User sends a request to browser. The request hits the API service through the load balancer. The load balancer redirects request to available ...
- 79
0
votes
1
answer
224
views
how to automatically switch the kafka client to another cluster without restart
I learnning kafka active/standy cluster , by read the cloudera article of Connection to the cluster with configured DNS aliases，i have some questions.
important part of above link article: If the ...
- 11
0
votes
1
answer
965
views
KeyVault replication - Do I have to manually create second KV in paired region?
I cannot deduce from documentation whether I need to create a KeyVault in second region for the KeyVault to replicate and failover in case of region outage or if it's done behind the scene.
I have a ...
1
vote
0
answers
278
views
How to recover automatically a failed primary node as standby node in Pgpool?
Imagine there is two node (primary and standby node) which they are already configured failover.
If primary node is down, standby node can promote as primary node
But in this case, I want to also ...
- 11
0
votes
1
answer
224
views
Set host-ip list in python-flask server
I would like to set a list of hosts (IPs) on which my Flask server can listen on so that if the main Ethernet port blows up there is the other one that can support the traffic (kind of simple failover)...
- 61