How can I solve kubectl error while using micro-onos(with kind)

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Hello I'm trying to use micro-onos. Now I'm using ubuntu 20.04 and to use micro-onos I've installed kind, kubectl(with snap), and helm(with brew)

I tried with kubectl commands before, and I thought I got success message. Next is following messages and result.

kubectl create namespace micro-onos with next result: namespace/micro-onos created

kubectl -n micro-onos get pods -w Name Ready STATUS RESTARTS AGE onos-cli-6b8d89f94-wbg55 0/1 ContainerCreating 0 0s onos-umbrella-topo-discovery-5b8cf447f40whhnh 0/1 ContainerCreating 0 0s

But today, I tried again, with the same command but error occurs like following. I did nothing more, but error occurs mir@ubuntu:~$ kubectl -n micro-onos get pods -w E1115 12:34:45.398243 11311 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused E1115 12:34:45.398446 11311 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused E1115 12:34:45.400070 11311 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused E1115 12:34:45.400161 11311 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused E1115 12:34:45.401586 11311 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused The connection to the server 127.0.0.1:45225 was refused - did you specify the right host or port?

I've searched in stack overflow, and I get error message like followings with next command: mir@ubuntu:~$ kubectl get nodes -v=10 I1115 12:34:37.949126 11249 loader.go:395] Config loaded from file: /home/mir/.kube/config I1115 12:34:37.949838 11249 round_trippers.go:466] curl -v -XGET -H "Accept: application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json" -H "User-Agent: kubectl/v1.28.3 (linux/amd64) kubernetes/a8a1abc" 'https://127.0.0.1:45225/api?timeout=32s' I1115 12:34:37.950201 11249 round_trippers.go:508] HTTP Trace: Dial to tcp:127.0.0.1:45225 failed: dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.950219 11249 round_trippers.go:553] GET https://127.0.0.1:45225/api?timeout=32s in 0 milliseconds I1115 12:34:37.950223 11249 round_trippers.go:570] HTTP Statistics: DNSLookup 0 ms Dial 0 ms TLSHandshake 0 ms Duration 0 ms I1115 12:34:37.950234 11249 round_trippers.go:577] Response Headers: E1115 12:34:37.950294 11249 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.950318 11249 cached_discovery.go:120] skipped caching discovery info due to Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.950353 11249 round_trippers.go:466] curl -v -XGET -H "Accept: application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json" -H "User-Agent: kubectl/v1.28.3 (linux/amd64) kubernetes/a8a1abc" 'https://127.0.0.1:45225/api?timeout=32s' I1115 12:34:37.950448 11249 round_trippers.go:508] HTTP Trace: Dial to tcp:127.0.0.1:45225 failed: dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.950461 11249 round_trippers.go:553] GET https://127.0.0.1:45225/api?timeout=32s in 0 milliseconds I1115 12:34:37.950465 11249 round_trippers.go:570] HTTP Statistics: DNSLookup 0 ms Dial 0 ms TLSHandshake 0 ms Duration 0 ms I1115 12:34:37.950468 11249 round_trippers.go:577] Response Headers: E1115 12:34:37.950483 11249 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.951961 11249 cached_discovery.go:120] skipped caching discovery info due to Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.951996 11249 shortcut.go:100] Error loading discovery information: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.952074 11249 round_trippers.go:466] curl -v -XGET -H "Accept: application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json" -H "User-Agent: kubectl/v1.28.3 (linux/amd64) kubernetes/a8a1abc" 'https://127.0.0.1:45225/api?timeout=32s' I1115 12:34:37.952181 11249 round_trippers.go:508] HTTP Trace: Dial to tcp:127.0.0.1:45225 failed: dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.952196 11249 round_trippers.go:553] GET https://127.0.0.1:45225/api?timeout=32s in 0 milliseconds I1115 12:34:37.952200 11249 round_trippers.go:570] HTTP Statistics: DNSLookup 0 ms Dial 0 ms TLSHandshake 0 ms Duration 0 ms I1115 12:34:37.952203 11249 round_trippers.go:577] Response Headers: E1115 12:34:37.952216 11249 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.952226 11249 cached_discovery.go:120] skipped caching discovery info due to Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.952253 11249 round_trippers.go:466] curl -v -XGET -H "User-Agent: kubectl/v1.28.3 (linux/amd64) kubernetes/a8a1abc" -H "Accept: application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json" 'https://127.0.0.1:45225/api?timeout=32s' I1115 12:34:37.952299 11249 round_trippers.go:508] HTTP Trace: Dial to tcp:127.0.0.1:45225 failed: dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.952311 11249 round_trippers.go:553] GET https://127.0.0.1:45225/api?timeout=32s in 0 milliseconds I1115 12:34:37.952315 11249 round_trippers.go:570] HTTP Statistics: DNSLookup 0 ms Dial 0 ms TLSHandshake 0 ms Duration 0 ms I1115 12:34:37.952317 11249 round_trippers.go:577] Response Headers: E1115 12:34:37.952324 11249 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.953453 11249 cached_discovery.go:120] skipped caching discovery info due to Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.954185 11249 round_trippers.go:466] curl -v -XGET -H "Accept: application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList,application/json" -H "User-Agent: kubectl/v1.28.3 (linux/amd64) kubernetes/a8a1abc" 'https://127.0.0.1:45225/api?timeout=32s' I1115 12:34:37.954374 11249 round_trippers.go:508] HTTP Trace: Dial to tcp:127.0.0.1:45225 failed: dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.954504 11249 round_trippers.go:553] GET https://127.0.0.1:45225/api?timeout=32s in 0 milliseconds I1115 12:34:37.954518 11249 round_trippers.go:570] HTTP Statistics: DNSLookup 0 ms Dial 0 ms TLSHandshake 0 ms Duration 0 ms I1115 12:34:37.954522 11249 round_trippers.go:577] Response Headers: E1115 12:34:37.954546 11249 memcache.go:265] couldn't get current server API group list: Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.954557 11249 cached_discovery.go:120] skipped caching discovery info due to Get "https://127.0.0.1:45225/api?timeout=32s": dial tcp 127.0.0.1:45225: connect: connection refused I1115 12:34:37.954610 11249 helpers.go:264] Connection error: Get https://127.0.0.1:45225/api?timeout=32s: dial tcp 127.0.0.1:45225: connect: connection refused The connection to the server 127.0.0.1:45225 was refused - did you specify the right host or port?

I reboot, reinstall kubectl, search for stack overflow and googles. I've tried from the first step from formatting, and reinstall the ubuntu either. It has the same problem in 22.04 and 20.04 either.

I wonder What is the problem. Can I get any ideas to solve it?

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