k8s问题记录

问题一

Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service": failed to get container info for "/system.slice/docker.service": unknown container "/system.slice/docker.service

原因：kubelet设置的cgroups和docker的不一致导致，修改一样的即可

修改kubelet

vim /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf

[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
# This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically
EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
# This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should use
# the .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file.
Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=systemd"
EnvironmentFile=-/etc/sysconfig/kubelet
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS $KUBELET_CGROUP_ARGS

修改docker

vim /etc/docker/daemon.json
{
    "registry-mirrors": ["https://koea0c8l.mirror.aliyuncs.com"],
    "exec-opts": ["native.cgroupdriver=systemd"],
    "graph": "{{ docker_data_dir }}",
    "insecure-registries": ["{{ harbor_domain }}", "{{ harbor_domain_name }}"]
}

#{{}}里面的是ansible的一种变量，可以忽略

修改完分别重启下即可