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kubelet配置详解及简单实例
摘要: 这两天试着重新去理解kubelet的每一个配置,并整理出我们最有可能要配置的项作为我们上生产的要考虑的kubelet最佳配置。
author: garnett.wang@gmail.com
kubernetes version: 1.6.2
Kubelet Configurations We Should Care About
下面是我梳理的,我认为必须关注的flag。
flag | value |
---|---|
–address | 0.0.0.0 |
–allow-privileged | false |
–cadvisor-port int32 | 4194 |
–cgroup-driver string | cgroupfs |
–cluster-dns stringSlice | 10.0.0.10 //todo |
–cluster-domain string | caas.vivo.com |
–cni-bin-dir string | /opt/cni/bin |
–cni-conf-dir string | /etc/cni/net.d |
–docker-endpoint string | unix:///var/run/docker.sock |
–eviction-hard string | memory.available<4Gi,<br/> nodefs.available<20Gi,<br/> imagefs.available<5Gi |
–eviction-max-pod-grace-period int32 | 30 |
–eviction-minimum-reclaim string | memory.available=500Mi,<br/> nodefs.available=2Gi,,<br/> imagefs.available=2Gi |
–eviction-pressure-transition-periodduration | 5m0s |
–eviction-soft string | memory.available<8Gi,<br/> nodefs.available<100Gi,<br/> imagefs.available<20Gi |
–eviction-soft-grace-period string | memory.available=30s,<br/> nodefs.available=2m,<br/> imagefs.available=2m |
–experimental-fail-swap-on | + |
–experimental-kernel-memcg-notification | + |
–feature-gates string | AllAlpha=false |
–file-check-frequency duration | 20s |
–hairpin-mode string | promiscuous-bridge |
–healthz-port int32 | 10248 |
–image-gc-high-threshold int32 | 60 |
–image-gc-low-threshold int32 | 40 |
–image-pull-progress-deadline duration | 2m0s |
–kube-api-qps int32 | 5 |
–kube-reserved mapStringString | cpu=200m,memory=16G |
–kubeconfig string | /var/lib/kubelet/kubeconfig |
–max-pods int32 | 50 |
–minimum-image-ttl-duration duration | 1h |
–network-plugin string | cni |
–pod-infra-container-image string | vivo.registry.com/google_containers/pause-amd64:3.0 |
–pod-manifest-path string | /var/lib/kubelet/pod_manifest |
–port int32 | 10250 |
–protect-kernel-defaults | + |
–read-only-port int32 | 10255 |
–require-kubeconfig | + |
–root-dir string | /var/lib/kubelet |
–runtime-request-timeout duration | 2m0s |
–serialize-image-pulls | false |
–sync-frequency duration | 1m0s |
–system-reserved mapStringString | cpu=100m,memory=32G |
–volume-plugin-dir string | /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ |
–volume-stats-agg-period duration | 1m0s |
下面是我最终梳理的,认为需要真正显示设置的flag,如下:
/usr/bin/kubelet —address=0.0.0.0 --port=10250 --allow-privileged=false --cluster-dns=10.0.0.1 --cluster-domain=caas.vivo.com --max-pods=50 --network-plugin=cni --require-kubeconfig --pod-manifest-path=/etc/kubelet.d/ --pod-infra-container-image=vivo.registry.com/google_containers/pause-amd64:3.0 --eviction-hard=memory.available<4Gi,nodefs.available<20Gi,imagefs.available<5Gi --eviction-max-pod-grace-period=30 --eviction-minimum-reclaim=memory.available=500Mi,nodefs.available=2Gi,imagefs.available=2Gi --eviction-pressure-transition-period=5m0s --eviction-soft=memory.available<8Gi,nodefs.available<100Gi,imagefs.available<20Gi --eviction-soft-grace-period=memory.available=30s,nodefs.available=2m,imagefs.available=2m --experimental-kernel-memcg-notification --experimental-fail-swap-on --system-reserved=cpu=100m,memory=8G --kube-reserved=cpu=200m,memory=16G --hairpin-mode=promiscuous-bridge --image-gc-high-threshold=60 --image-gc-low-threshold=40 --serialize-image-pulls=false --protect-kernel-defaults --feature-gates=AllAlpha=false
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