标签:https 软件包 ifconf devops 一个 esc ISE 原因 tde
kube-scheduler集群包含 3 个节点,启动后将通过竞争选举机制产生一个 leader 节点,其它节点为阻塞状态。当 leader 节点不可用后,剩余节点将再次进行选举产生新的 leader 节点,从而保证服务的可用性。#################### Variable parameter setting ######################
KUBE_NAME=kube-scheduler
K8S_INSTALL_PATH=/data/apps/k8s/kubernetes
K8S_BIN_PATH=${K8S_INSTALL_PATH}/sbin
K8S_LOG_DIR=${K8S_INSTALL_PATH}/logs
K8S_CONF_PATH=/etc/k8s/kubernetes
KUBE_CONFIG_PATH=/etc/k8s/kubeconfig
CA_DIR=/etc/k8s/ssl
SOFTWARE=/root/software
VERSION=v1.14.2
PACKAGE="kubernetes-server-${VERSION}-linux-amd64.tar.gz"
DOWNLOAD_URL=“”https://github.com/devops-apps/download/raw/master/kubernetes/${PACKAGE}"
ETCD_ENDPOIDS=https://10.10.10.22:2379,https://10.10.10.23:2379,https://10.10.10.24:2379
ETH_INTERFACE=eth1
LISTEN_IP=$(ifconfig | grep -A 1 ${ETH_INTERFACE} |grep inet |awk ‘{print $2}‘)
USER=k8s
访问kubernetes github 官方地址下载稳定的 realease 包至本机;
wget $DOWNLOAD_URL -P $SOFTWARE
将kubernetes 软件包分发到各个master节点服务器;
sudo ansible master_k8s_vgs -m copy -a "src=${SOFTWARE}/$PACKAGE dest=${SOFTWARE}/" -b
### 1.Check if the install directory exists.
if [ ! -d "$K8S_BIN_PATH" ]; then
mkdir -p $K8S_BIN_PATH
fi
if [ ! -d "$K8S_LOG_DIR/$KUBE_NAME" ]; then
mkdir -p $K8S_LOG_DIR/$KUBE_NAME
fi
if [ ! -d "$K8S_CONF_PATH" ]; then
mkdir -p $K8S_CONF_PATH
fi
if [ ! -d "$KUBE_CONFIG_PATH" ]; then
mkdir -p $KUBE_CONFIG_PATH
fi
### 2.Install kube-apiserver binary of kubernetes.
if [ ! -f "$SOFTWARE/kubernetes-server-${VERSION}-linux-amd64.tar.gz" ]; then
wget $DOWNLOAD_URL -P $SOFTWARE >>/tmp/install.log 2>&1
fi
cd $SOFTWARE && tar -xzf kubernetes-server-${VERSION}-linux-amd64.tar.gz -C ./
cp -fp kubernetes/server/bin/$KUBE_NAME $K8S_BIN_PATH
ln -sf $K8S_BIN_PATH/$KUBE_NAM /usr/local/bin
chown -R $USER:$USER $K8S_INSTALL_PATH
chmod -R 755 $K8S_INSTALL_PATH
sudo ansible master_k8s_vgs -m synchronize -a "src=${CA_DIR}/kube-scheduler* dest=${K8S_KUBECONFIG_PATH}/ mode=push delete=yes rsync_opts=-avz" -b
kube-scheduler使用 kubeconfig文件连接访问 apiserver服务,该文件提供了 apiserver 地址、嵌入的 CA 证书和 kube-scheduler证书:
sudo ansible master_k8s_vgs -m synchronize -a "src=${K8S_KUBECONFIG_PATH}/ dest=${K8S_KUBECONFIG_PATH}/ mode=push delete=yes rsync_opts=-avz" -b
备注: 如果在前面小节已经同步过各组件kubeconfig和证书文件,此处可以不必执行此操作;
cat >${K8S_CONF_PATH}/kube-scheduler.yaml<<EOF
apiVersion: kubescheduler.config.k8s.io/v1alpha1
kind: KubeSchedulerConfiguration
bindTimeoutSeconds: 600
clientConnection:
burst: 200
kubeconfig: "${KUBE_CONFIG_PATH}/${KUBE_NAME}.kubeconfig"
qps: 100
enableContentionProfiling: false
enableProfiling: true
hardPodAffinitySymmetricWeight: 1
healthzBindAddress: 127.0.0.1:10251
leaderElection:
leaderElect: true
metricsBindAddress: 127.0.0.1:10251
EOF
cat >/usr/lib/systemd/system/${KUBE_NAME}.service<<EOF
[Unit]
Description=Kubernetes kube-scheduler Service
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
After=etcd.service
[Service]
User=${USER}
WorkingDirectory=${K8S_INSTALL_PATH}
ExecStart=${K8S_BIN_PATH}/${KUBE_NAME} \ --config=/etc/k8s/kubernetes/kube-scheduler.yaml \ --bind-address=${LISTEN_IP} \ --secure-port=10259 \ --tls-cert-file=${CA_DIR}/kube-scheduler.pem \ --tls-private-key-file=${CA_DIR}/kube-scheduler-key.pem \ --kubeconfig=${KUBE_CONFIG_PATH}/${KUBE_NAME}.kubeconfig \ --authentication-kubeconfig=${KUBE_CONFIG_PATH}/${KUBE_NAME}.kubeconfig \ --authorization-kubeconfig=${KUBE_CONFIG_PATH}/${KUBE_NAME}.kubeconfig \ --client-ca-file=${CA_DIR}/ca.pem \ --requestheader-allowed-names="" \ --requestheader-client-ca-file=${CA_DIR}/ca.pem \ --requestheader-extra-headers-prefix="X-Remote-Extra-" \ --requestheader-group-headers=X-Remote-Group \ --requestheader-username-headers=X-Remote-User \ --leader-elect=true \ --alsologtostderr=true \ --logtostderr=false \ --log-dir=${K8S_LOG_DIR}/${KUBE_NAME} \ --v=2
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
systemctl status kube-scheduler|grep Active
确保状态为 active (running),否则查看日志,确认原因:
sudo journalctl -u kube-scheduler
注意:以下命令在 kube-scheduler 节点上执行。kube-scheduler 监听 10251 和 10251 端口:
sudo netstat -lnpt |grep kube-sch
tcp 0 0 127.0.0.1:10251 0.0.0.0:* LISTEN 28786/kube-schedule
tcp 0 0 10.10.10.22:10259 0.0.0.0:* LISTEN 28786/kube-schedule
kubectl get endpoints kube-scheduler --namespace=kube-system -o yaml
随机找一个或两个 master 节点,停掉 kube-scheduler 服务,看其它节点是否获取了 leader 权限.
kubernetes集群安装指南:master组件kube-scheduler部署
标签:https 软件包 ifconf devops 一个 esc ISE 原因 tde
原文地址:https://blog.51cto.com/blief/2417095