It is possible for the zero node to lose connectivity with the alpha node in certain situations. Some possible causes of this issue include:
- The alpha node is unhealthy: If the alpha node is experiencing problems such as being overloaded, panicking, or crashing. This can cause the zero node to receive a connection refused error when attempting to connect to the alpha node.
- The alpha node is being restarted: If the alpha node is being restarted or replaced by the Kubernetes cluster, it may temporarily become unavailable, causing the zero node to receive a connection refused error when attempting to connect.
- Networking issues: If there are networking issues between the zero node and the alpha node, such as a network partition or a routing problem, it may be unable to establish a connection, resulting in a connection refused error.
It is worth noting that in order to ensure optimal performance and reliability, it is generally recommended to run the zero and alpha nodes on separate physical machines or K8s worker. This can help to avoid resource contention and other issues that can arise when the nodes are running on the same machine or in the same pod. If you are experiencing repeated connectivity issues between the zero and alpha nodes, it may be worth considering separating them onto different machines or workers to see if this helps to resolve the problem.