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WYSIWYG. Convention over configuration. Productivity > Performance Know how much your code costs. No hidden overloads, overhead, etc.
Adam Schaub gitschaub
gitschaub
/ kube_dns_containers.log
Last active
March 22, 2016 14:13
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| docker exit codes: | |
| 175f8fa5553d gcr.io/google_containers/exechealthz:1.0 "/exechealthz '-cmd=n" 16 hours ago Exited (2) 16 hours ago k8s_healthz.40c4147f_kube-dns-v11-sgwh4_kube-system_29e7eb19-efad-11e5-822b-0cc47a205a18_62af75a6 | |
| 2be524e5f1f4 gcr.io/google_containers/skydns:2015-10-13-8c72f8c "/skydns -machines=ht" 16 hours ago Exited (2) 16 hours ago k8s_skydns.7b5d3ad2_kube-dns-v11-sgwh4_kube-system_29e7eb19-efad-11e5-822b-0cc47a205a18_60513b7d | |
| f085637defb2 gcr.io/google_containers/kube2sky:1.14 "/kube2sky --domain=c" 16 hours ago Exited (255) 16 hours ago k8s_kube2sky.74cfb978_kube-dns-v11-sgwh4_kube-system_29e7eb19-efad-11e5-822b-0cc47a205a18_6c5c0ce2 | |
| 392edb9f920a gcr.io/google_containers/etcd-amd64:2.2.1 "/usr/local/bin/etcd " 16 hours ago Exited (0) 16 hours ago k8s_etcd.822e3531_kube-dns-v11sgwh4_kube-sy |
gitschaub
/ kubelet_kube-proxy.log
Created
March 22, 2016 21:26
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| $ journalctl -f -u kubelet -u kube-proxy | |
| Mar 22 20:09:53 k8s-master kube-proxy[826]: E0322 20:09:53.884441 826 proxysocket.go:93] Couldn't find an endpoint for kube-system/kube-dns:dns: missing service entry | |
| Mar 22 20:09:58 k8s-master kube-proxy[826]: E0322 20:09:58.892181 826 proxysocket.go:93] Couldn't find an endpoint for kube-system/kube-dns:dns: missing service entry | |
| Mar 22 20:10:03 k8s-master kube-proxy[826]: E0322 20:10:03.915378 826 proxysocket.go:93] Couldn't find an endpoint for kube-system/kube-dns:dns: missing service entry | |
| Mar 22 20:10:08 k8s-master kube-proxy[826]: E0322 20:10:08.938615 826 proxysocket.go:93] Couldn't find an endpoint for kube-system/kube-dns:dns: missing service entry | |
| Mar 22 20:18:42 k8s-master kube-proxy[826]: E0322 20:18:42.419408 826 proxysocket.go:216] ReadFrom failed, exiting ProxyLoop: read udp [::]:34343: use of closed network connection | |
| Mar 22 20:18:43 k8s-master kube-proxy[826]: E0322 20:18:43.529588 826 proxysocket.go:165] I/O error: write tcp |
gitschaub
/ kubelet_kube-proxy.log
Created
March 22, 2016 21:46
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| core@k8s-master /var/log $ journalctl -u kube-proxy | |
| Mar 21 17:38:39 k8s-master systemd[1]: Started Kubernetes Kube-Proxy Server. | |
| Mar 21 17:38:39 k8s-master kube-proxy[713]: E0321 17:38:39.544714 713 server.go:357] Not trying iptables proxy: can't get Node "k8s-master": Get https://147.75.197.101:443/api/v1/nodes/k8s-master: d | |
| Mar 21 17:38:39 k8s-master kube-proxy[713]: F0321 17:38:39.544968 713 server.go:272] Unable to create proxier: failed to select a host interface: Unable to select an IP. | |
| Mar 21 17:38:39 k8s-master systemd[1]: kube-proxy.service: Main process exited, code=exited, status=255/n/a | |
| Mar 21 17:38:39 k8s-master systemd[1]: kube-proxy.service: Unit entered failed state. | |
| Mar 21 17:38:39 k8s-master systemd[1]: kube-proxy.service: Failed with result 'exit-code'. | |
| Mar 21 17:38:39 k8s-master systemd[1]: kube-proxy.service: Service hold-off time over, scheduling restart. | |
| Mar 21 17:38:39 k8s-master systemd[1]: Stopped Kubernetes Kube-Proxy Server. | |
| Mar 21 17:38:39 k8s-master systemd[1]: Started Ku |
gitschaub
/ ingess_namespaces.txt
Last active
March 25, 2016 06:39
Nginx ingress controller does not respect namespace of ingress rules.
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| $ kubectl get ing --namespace=test | |
| NAME RULE BACKEND ADDRESS | |
| nginx-ingress - | |
| bar.baz.com | |
| /gemini frontend:80 | |
| $ kubectl get ing | |
| NAME RULE BACKEND ADDRESS | |
| nginx-ingress - | |
| foo.bar.com |
gitschaub
/ ingress_proxy_route.txt
Last active
March 24, 2016 20:00
Nginx ingress controller passes ingress route to the service endpoint.
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| $ kubectl get ing | |
| NAME RULE BACKEND ADDRESS | |
| nginx-ingress - | |
| foo.bar.com | |
| /dash kubernetes-dashboard:9090 | |
| $ kubectl describe svc kubernetes-dashboard | |
| Name: kubernetes-dashboard | |
| Namespace: default | |
| Labels: app=kubernetes-dashboard |
gitschaub
/ ingress_partial_route_match
Last active
March 24, 2016 20:18
Possible issue with partial route matches. Setting an ingress rule for /status will proxy all routes matching /status* to the associated endpoint. This may cause unexpected behavior as shown below.
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| $ kubectl describe svc nginx-plus-service | |
| Name: nginx-plus-service | |
| Namespace: default | |
| Labels: <none> | |
| Selector: app=nginx-plus-ingress | |
| Type: ClusterIP | |
| IP: None | |
| Port: <unnamed> 8080/TCP | |
| Endpoints: 172.16.81.36:8080 | |
| Session Affinity: None |
gitschaub
/ gist:ed170d41ee7e6312a9b5
Created
March 26, 2016 15:20
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| NAME RULE BACKEND ADDRESS | |
| nginx-ingress - | |
| foo.bar.com | |
| /same-route frontend-1:80 | |
| bar.baz.com | |
| /same-route frontend-2:80 |
gitschaub
/ gist:5bf2f9cb17632809c85c4df1facec0b8
Created
May 16, 2016 21:12
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| ADAMSCHA-M-M05P:ansible adamscha$ cat roles/master/templates/podmaster.yml.j2 | |
| apiVersion: v1 | |
| kind: Pod | |
| metadata: | |
| name: scheduler-master | |
| spec: | |
| hostNetwork: true | |
| containers: | |
| - name: scheduler-elector | |
| image: gcr.io/google_containers/podmaster:1.1 |
gitschaub
/ ultimate-go.md
Last active
June 24, 2016 23:45
gitschaub
/ go_concurrency
Created
July 19, 2016 00:55
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| //program | |
| func do(s string, i int) { | |
| fmt.Printf("%s_%d\n", s, i) | |
| } | |
| func main() { | |
| for i := 0; i < 5; i++ { | |
| go do("Hello", i) | |
| go do("World", i) | |
| } |
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