1. 程式人生 > >阿里雲 Centos7 輕量伺服器 安裝 K8s 叢集---採坑

阿里雲 Centos7 輕量伺服器 安裝 K8s 叢集---採坑

前言:集百家之言......

環境規劃:

作業系統:centos7.3
Kubernetes :1.10.7
Docker: 18.06.0-ce
Etcd: 3.0
CPU 1核+ 2G記憶體+
master
192.168.1.6 kube-apiserver kube-controller-manager kube-scheduler flannel etcd
node01
192.168.1.7 kubelet kube-proxy docker flannel etcd
node02
192.168.1.8 kubelet kube-proxy docker flannel etcd
注意有iptables的注意新增規則內網互通:
iptables -I INPUT -s 192.168.1.0/24 -j ACCEPT
 

基礎環境:

關閉防火牆


[[email protected] ~]# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)
[[email protected] ~]#
[[email protected] ~]#
[[email protected] ~]# systemctl stop firewalld
[[email protected] ~]#
[[email protected] ~]# systemctl disable firewalld

關閉selinux:

[[email protected] ~]# sed -i 's/enforcing/disabled/' /etc/selinux/config
[[email protected] ~]# setenforce 0
setenforce: SELinux is disabled
[[email protected] ~]#
[[email protected] ~]#

關閉swap:

[[email protected] ~]# swapoff -a
[[email protected] ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           1838        1288          76          17         474         366
Swap:             0           0           0
[
[email protected]
~]#

 設定k8s叢集主機名(你自己的叢集節點ip)(可有可無)


# echo '47.95.7.67    k8s-master
47.95.7.67          etcd
120.783.212        k8s-node-212
39.1.201.0          k8s-node-0' >> /etc/hosts

同步時間:

[[email protected] ~]# yum install ntpdate -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base                                                                                                    | 3.6 kB  00:00:00
docker-ce-stable                                                                                        | 2.9 kB  00:00:00
epel                                                                                                    | 3.2 kB  00:00:00
extras                                                                                                  | 3.4 kB  00:00:00
updates                                                                                                 | 3.4 kB  00:00:00
(1/3): epel/x86_64/updateinfo                                                                           | 933 kB  00:00:00
(2/3): updates/7/x86_64/primary_db                                                                      | 6.0 MB  00:00:00
(3/3): epel/x86_64/primary                                                                              | 3.6 MB  00:00:00
epel                                                                                                               12756/12756
Package ntpdate-4.2.6p5-28.el7.centos.x86_64 already installed and latest version
Nothing to do
[[email protected] ~]# ntpdate ntp.api.bz
 1 Nov 12:22:26 ntpdate[27967]: the NTP socket is in use, exiting
[[email protected] ~]#

安裝Docker 方案一:

# yum install -y yum-utils device-mapper-persistent-data lvm2

如果提示container-selinux依賴問題,先安裝ce-17.03匹配版本:
# yum localinstall https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.3.ce-1.e17.noarch.rpm

如果已安裝docker-ce 18, 先解除安裝:
# yum remove docker container-selinux

# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

檢視當前所有docker 版本

# yum list docker-ce.x86_64 --showduplicates |sort -r

目前docker 最大支援docker-ce-17.03, 所以要指定版本安裝
# yum install -y docker-ce

# systemctl enable docker & systemctl start docker

# vi /lib/systemd/system/docker.service
   
#找到ExecStart=xxx,在這行上面加入一行,內容如下:(k8s的網路需要)
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
啟動服務
# systemctl daemon-reload
# service docker start

安裝docker 方案二:

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce
 cat << EOF > /etc/docker/daemon.json
{
"registry-mirrors": [ "https://registry.docker-cn.com"]
}
EOF

systemctl start docker
systemctl enable docker

建立k8s的目錄:

mkdir -p /opt/kubernetes/{bin,cfg,ssl}

自籤TLS證書: 

在master上面操作,即192.168.1.6
安裝證書生成工具cfssl:



不知道如何建立證書可以根據提示 生成模板然後修改:
 

cfssl print-defaults config >config.json
cfssl print-defaults csr >csr.json

生成我們需要的證書指令碼:



然後執行該指令碼
我們只需要生成的pem格式的證書,其他的可以刪掉了。

ls |grep -v pem|xargs -i rm {}

然後將我們證書拷貝到我們定義的地方:

cp server* ca* /opt/kubernetes/ssl/

部署etcd 儲存叢集:

首先我們在master上操作,即192.168.1.6

此處我們可以用的最新版的:3.2.12版本
wget https://github.com/etcd-io/etcd/releases/download/v3.2.12/etcd-v3.2.12-linux-amd64.tar.gz
tar xvf etcd-v3.2.12-linux-amd64.tar.gz
cd etcd-v3.2.12-linux-amd64

#將我們需要的可執行檔案拷貝到我們自定義的地方

cp etcd  /opt/kubernetes/bin/
cp etcdctl /opt/kubernetes/bin/

編輯etcd配置檔案:

vim /opt/kubernetes/cfg/etcd

#[Member]
ETCD_NAME="etcd01"
#資料目錄
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.6:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.6:2379"

#節點資訊
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.6:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.6:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.1.6:2380,etcd02=https://192.168.1.7:2380,etcd03=https://192.168.1.8:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

將etcd配置到系統環境中:

vim /usr/lib/systemd/system/etcd.service


[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=-/opt/kubernetes/cfg/etcd
ExecStart=/opt/kubernetes/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-state=new \
--cert-file=/opt/kubernetes/ssl/server.pem \
--key-file=/opt/kubernetes/ssl/server-key.pem \
--peer-cert-file=/opt/kubernetes/ssl/server.pem \
--peer-key-file=/opt/kubernetes/ssl/server-key.pem \
--trusted-ca-file=/opt/kubernetes/ssl/ca.pem \
--peer-trusted-ca-file=/opt/kubernetes/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

啟動etcd服務:

檢視/var/log/message

systemctl start etcd

#開機啟動
systemctl enable etcd

如果啟動的時候沒有退出命令互動介面,可以強制ctrl +c
如果報錯:journalctl -xe 檢視日誌 
檢視/var/log/message

說道說道阿里雲輕量伺服器:

錯誤一systemd啟動etcd服務的時候出現錯誤:Failed at step CHDIR spawning /usr/bin/etcd: No such file or directory

解決辦法:etcd.service服務配置檔案中設定的工作目錄WorkingDirectory=/var/lib/etcd/必須存在,否則會報以上錯誤

錯誤二systemd啟動etcd服務的時候出現錯誤:cannot assign requested address

解決辦法:更改 vim /opt/kubernetes/cfg/etcd ,繫結阿里雲的私網IP。

安全組:2379,2380,43944

錯誤三: fatal: parameter inet_interfaces: no local interface found for ::1

vi  /etc/postfix/main.cf

發現配置為:

inet_interfaces = localhost

inet_protocols = all

改成:

inet_interfaces = all

inet_protocols = all

重新啟動就ok了

service postfix start 

錯誤四:dial tcp 127.0.0.1:4001: getsockopt: connection refused

解決辦法:ETCD_LISTEN_CLIENT_URLS需要配置http://127.0.0.1:2379,特別注意,此處是http而不是https

以上錯誤,三臺伺服器都需要注意,切記,切記,切記。。。。。。。。。。

繼續啟動 systemctl start etcd 如果不退出,可以 ctrl + c ,然後 ps -ef|grep etcd 就可以看到了 etcd 程序。

每臺伺服器上安裝 rsync :

yum install rsync -y 

把我們剛才的配置都copy 到其他機器上:

rsync -avzP /opt/kubernetes [email protected]:/opt
rsync -avzP /opt/kubernetes [email protected]:/opt

傳過去以後我們只需要變更/opt/kubernetes/cfg/etcd 配置檔案即可
需要改的地方:

vim /opt/kubernetes/cfg/etcd

注意:ETCD_NAME 記得修改

#資料目錄
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://阿里雲內網ip:2380"
ETCD_LISTEN_CLIENT_URLS="https://阿里雲內網ip:2379"

其他:外網ip。

上述  vim /usr/lib/systemd/system/etcd.service 該配置,在每個node 上生成,然後啟動。

注意 上圖中 那個 ETCD_NAME= 這個配置,分別是01,02,03.

測試etcd:

cd  /opt/kubernetes/ssl
/opt/kubernetes/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379" cluster-health

#正常如下:
member 16d32cea662d494c is unreachable: no available published client urls
member 766bc6053ca9ca80 is healthy: got healthy result from https://39.1001.0:2379
member 8a6a38d26f51127e is healthy: got healthy result from https://47.957.67:2379
cluster is healthy

/******************************************************** ETCD 部署結束 ***********************************************************/

部署Flannel網路:

我們先在master上面操作,即192.168.1.6
下載二進位制包:
此處我們用的比較新的0.10版本
wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz

將解壓後得到的可執行檔案放入我們之定義的路徑下面:

cp flanneld mk-docker-opts.sh /opt/kubernetes/bin/

配置配置檔案:
直接在命令列 將配置檔案利用EOF寫進去:

#寫flanneld配置檔案
cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379 \
-etcd-cafile=/opt/kubernetes/ssl/ca.pem \
-etcd-certfile=/opt/kubernetes/ssl/server.pem \
-etcd-keyfile=/opt/kubernetes/ssl/server-key.pem"

EOF

#寫入 flanneld系統配置檔案
cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

#寫入分配的子網段到etcd,供flanneld使用
cd /opt/kubernetes/ssl

/opt/kubernetes/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

測試:

/opt/kubernetes/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379" get /coreos.com/network/config
systemctl enable flanneld
systemctl start flanneld

如果報錯請檢視:/var/log/message

檢視flanneld分配的網路:

cat /run/flannel/subnet.env

編輯docker系統配置檔案:

cat <<EOF >/usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd  \$DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP \$MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl restart docker

檢視ifconfig 中 會出現一個flannel 網路,並且flannel和docker0 網路段會相同

設定完成後將配置檔案分發到node02,和node03上即192.168.1.7和192.168.1.8

方案一, 將上述操作檔案copy 到 其他 節點:
 

阿里雲 輕量伺服器會有部分檔案, copy 不過去,建議去各個節點重複上述操作。

rsync -avzP /opt/kubernetes/bin/flanneld mk-docker-opts.sh [email protected]:/opt/kubernetes/bin/
rsync -avzP /opt/kubernetes/cfg/flanneld [email protected]:/opt/kubernetes/cfg/
rsync -avzP /usr/lib/systemd/system/flanneld.service [email protected]:/usr/lib/systemd/system/

rsync -avzP /opt/kubernetes/bin/flanneld mk-docker-opts.sh [email protected]:/opt/kubernetes/bin/
rsync -avzP /opt/kubernetes/cfg/flanneld [email protected]:/opt/kubernetes/cfg/
rsync -avzP /usr/lib/systemd/system/flanneld.service [email protected]:/usr/lib/systemd/system/

然後將docker系統配置檔案(即/usr/lib/systemd/system/docker.servic)改成和 master(192.168.1.6)一樣,
然後啟動

systemctl daemon-reload
systemctl enable flanneld
systemctl start flanneld
systemctl restart docker

檢視ifconfig 是否有flanneld,docker0網路是否和flanneld一致,
在master上ping node02上的docker0閘道器,如果能通的話證明Ok
如下:

[[email protected] ssl]# /opt/kubernetes/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379" ls /coreos.com/network/subnets
/coreos.com/network/subnets/172.17.41.0-24
/coreos.com/network/subnets/172.17.96.0-24
/coreos.com/network/subnets/172.17.98.0-24

[[email protected] ssl]# ping 172.17.41.1
PING 172.17.41.1 (172.17.41.1) 56(84) bytes of data.
64 bytes from 172.17.41.1: icmp_seq=1 ttl=64 time=0.454 ms

/********************************************** flannel ping 不通,懷疑阿里雲的坑 ************************************/

建立Node節點kubeconfig檔案:

在Master上執行即192.168.1.6:

mkdir /opt/ssl

cd /opt/ssl

執行指令碼獲取我們所需的檔案,總共有三個:
1、TLS Bootstrapping Token
2、kubelet kubeconfig
3、kube-proxy kubeconfig

阿里雲伺服器 此處配置:export KUBE_APISERVER="https://192.168.1.6:6443" , 設定為阿里雲內網IP(外網ip 也行......)。

[[email protected] ssl]# cat kubeconfig.sh
# 建立 TLS Bootstrapping Token
export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

#----------------------

# 建立kubelet bootstrapping kubeconfig
export KUBE_APISERVER="https://192.168.1.6:6443"

# 設定叢集引數
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=bootstrap.kubeconfig

# 設定客戶端認證引數
kubectl config set-credentials kubelet-bootstrap \
  --token=${BOOTSTRAP_TOKEN} \
  --kubeconfig=bootstrap.kubeconfig

# 設定上下文引數
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=bootstrap.kubeconfig

# 設定預設上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

#----------------------

# 建立kube-proxy kubeconfig檔案

kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
  --client-certificate=./kube-proxy.pem \
  --client-key=./kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

執行該指令碼:

sh -x kubeconfig.sh

#結果如下
[[email protected] ssl]# sh -x kubeconfig.sh
++ head -c 16 /dev/urandom
++ od -An -t x
++ tr -d ' '
+ export BOOTSTRAP_TOKEN=0115145c5898d710c8a887f32994b882
+ BOOTSTRAP_TOKEN=0115145c5898d710c8a887f32994b882
+ cat
+ export KUBE_APISERVER=https://47.95.237.67:6443
+ KUBE_APISERVER=https://47.95.237.67:6443
+ kubectl config set-cluster kubernetes --certificate-authority=/opt/kubernetes/ssl/ca.pem --embed-certs=true --server=https://47.95.237.67:6443 --kubeconfig=bootstrap.kubeconfig
Cluster "kubernetes" set.
+ kubectl config set-credentials kubelet-bootstrap --token=0115145c5898d710c8a887f32994b882 --kubeconfig=bootstrap.kubeconfig
User "kubelet-bootstrap" set.
+ kubectl config set-context default --cluster=kubernetes --user=kubelet-bootstrap --kubeconfig=bootstrap.kubeconfig
Context "default" modified.
+ kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
Switched to context "default".
+ kubectl config set-cluster kubernetes --certificate-authority=/opt/kubernetes/ssl/ca.pem --embed-certs=true --server=https://47.95.237.67:6443 --kubeconfig=kube-proxy.kubeconfig
Cluster "kubernetes" set.
+ kubectl config set-credentials kube-proxy --client-certificate=./kube-proxy.pem --client-key=./kube-proxy-key.pem --embed-certs=true --kubeconfig=kube-proxy.kubeconfig
error: error reading client-certificate data from ./kube-proxy.pem: open ./kube-proxy.pem: no such file or directory
+ kubectl config set-context default --cluster=kubernetes --user=kube-proxy --kubeconfig=kube-proxy.kubeconfig
Context "default" modified.
+ kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
Switched to context "default".
[[email protected] ssl]#

此時我們可以獲取到三個配置檔案,我們將其拷貝到指定目錄:

cp -rf token.csv bootstrap.kubeconfig kube-proxy.kubeconfig /opt/kubernetes/cfg/

獲取K8S二進位制包:

wget https://dl.k8s.io/v1.10.7/kubernetes-server-linux-amd64.tar.gz

我們先在master(192.168.1.6)上操作

master需要三個元件:kube-apiserver kube-controller-manager kube-scheduler
我們將其拿出來 放入指定目錄:

tar xvf kubernetes-server-linux-amd64.tar.gz
cp kubernetes/server/bin/kube-scheduler ./
cp kubernetes/server/bin/kube-controller-manager ./
cp kubernetes/server/bin/kube-apiserver ./
[[email protected] kubernetes]# ls
apiserver.sh  controller-manager.sh  kube-apiserver  kube-controller-manager  kubectl  kube-scheduler  master.zip  scheduler.sh

mv kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/
賦予許可權
chmod +x /opt/kubernetes/bin/*


echo "export PATH=$PATH:/opt/kubernetes/bin" >> /etc/profile

其中的*.sh檔案是我們自定義的指令碼,幫助我們安裝。
安裝kube-apiserver:

阿里雲伺服器此處配置 MASTER_ADDRESS=${1:-"192.168.1.6"}  配置為內網ip.

[[email protected] kubernetes]# cat apiserver.sh
#!/bin/bash

MASTER_ADDRESS=${1:-"192.168.1.6"}
ETCD_SERVERS=${2:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \\
--v=4 \\
--etcd-servers=${ETCD_SERVERS} \\
--insecure-bind-address=0.0.0.0 \\
--bind-address=${MASTER_ADDRESS} \\
--insecure-port=8080 \\
--secure-port=6443 \\
--advertise-address=${MASTER_ADDRESS} \\
--allow-privileged=true \\
--service-cluster-ip-range=10.10.10.0/24 \\
--admission-control=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \\
--kubelet-https=true \\
--enable-bootstrap-token-auth \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-50000 \\
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \\
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \\
--client-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--etcd-cafile=/opt/kubernetes/ssl/ca.pem \\
--etcd-certfile=/opt/kubernetes/ssl/server.pem \\
--etcd-keyfile=/opt/kubernetes/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver
ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver

執行指令碼:

阿里雲伺服器如下 ./apiserver.sh 192.168.1.6  改成 阿里雲 內網IP。

./apiserver.sh 192.168.1.6 https://192.168.1.6:2379,https://192.168.1.7:2379,https://192.168.1.8:2379

安裝:controller-manager
編寫安裝指令碼:

[[email protected] master_pkg]# cat controller-manager.sh
#!/bin/bash

MASTER_ADDRESS=${1:-"127.0.0.1"}

cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager


KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${MASTER_ADDRESS}:8080 \\
--leader-elect=true \\
--address=127.0.0.1 \\
--service-cluster-ip-range=10.10.10.0/24 \\
--cluster-name=kubernetes \\
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem  \\
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--root-ca-file=/opt/kubernetes/ssl/ca.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager
ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager

執行指令碼安裝啟動:

./controller-manager.sh 127.0.0.1
ps uxa |grep controller-manager

安裝scheduler:

編寫安裝指令碼:
[[email protected] master_pkg]# cat scheduler.sh
#!/bin/bash

MASTER_ADDRESS=${1:-"127.0.0.1"}

cat <<EOF >/opt/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${MASTER_ADDRESS}:8080 \\
--leader-elect"

EOF

cat <<EOF >/usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler
ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler

執行指令碼安裝啟動:

./scheduler.sh 127.0.0.1
ps aux |grep scheduler

到這裡我們可以測試叢集大概狀態了:

[[email protected] master_pkg]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-1               Healthy   {"health": "true"}
etcd-2               Healthy   {"health": "true"}
etcd-0               Healthy   {"health": "true"}

檢視狀態:

systemctl status kube-scheduler

systemctl status kube-controller-manager

systemctl status kube-apiserver

要是都是非 綠色的 activity .則通過日誌檢視錯誤原因 :

journalctl -u kube-apiserver

journalctl -u kube-controller-manager

journalctl -u kube-controller-manager

執行node元件:

首先我們需要在master上面生成一個角色用於node上證書繫結認證
在master上面操作(192.168.1.6)
建立認證使用者:

kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

如果建立錯誤我們可以先刪除再建立:
刪除: kubectl delete clusterrolebinding kubelet-bootstrap
將在master上面生成的 bootstrap.kubeconfig ,kube-proxy.kubeconfig檔案傳到node節點上面去
 


cd /opt/ssl/

rsync -avPz bootstrap.kubeconfig kube-proxy.kubeconfig [email protected]:/opt/kubernetes/cfg/
rsync -avPz bootstrap.kubeconfig kube-proxy.kubeconfig [email protected]:/opt/kubernetes/cfg/

#注意這兩個檔案的大小
total 16
-rw------- 1 root root 2174 Nov  8 10:57 bootstrap.kubeconfig
-rwxrwxrwx 1 root root 1554 Nov  8 10:57 kubeconfig.sh
-rw------- 1 root root 2092 Nov  8 10:57 kube-proxy.kubeconfig
-rw-r--r-- 1 root root   84 Nov  8 10:57 token.csv


在node上操作(192.168.1.7)
將我們需要的檔案(kubelet ,kube-proxy)拿出來,檔案都在我們下載的二進位制包中,其中*.sh為我們自定義的指令碼:

[[email protected] node_pkg]# ls
kubelet  kubelet.sh  kube-proxy   proxy.sh
chmod +x *.sh

mv kubelet kube-proxy /opt/kubernetes/bin/
chmod +x /opt/kubernetes/bin/*

echo "export PATH=$PATH:/opt/kubernetes/bin" >> /etc/profile

安裝kubelet
編輯安裝指令碼:

kubelet.sh 中  NODE_ADDRESS=${1:-"192.168.1.6"} , 配置為阿里雲外網ip, 注意 該處是 主節點的Ip

[[email protected] node_pkg]# cat kubelet.sh
#!/bin/bash

NODE_ADDRESS=${1:-"192.168.1.6"}
DNS_SERVER_IP=${2:-"10.10.10.2"}

cat <<EOF >/opt/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \\
--v=4 \\
--address=${NODE_ADDRESS} \\
--hostname-override=${NODE_ADDRESS} \\
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\
--experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\
--cert-dir=/opt/kubernetes/ssl \\
--allow-privileged=true \\
--cluster-dns=${DNS_SERVER_IP} \\
--cluster-domain=cluster.local \\
--fail-swap-on=false \\
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

EOF

cat <<EOF >/usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
KillMode=process

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet

執行指令碼安裝:

阿里雲伺服器,此 ip 192.168.1.7, 為阿里雲內網ip.

sh ./kubelet.sh 192.168.1.7 10.10.10.2

啟動出錯檢視:/var/log/message

安裝kube-proxy:
編寫安裝指令碼:

[[email protected] node_pkg]# cat proxy.sh
#!/bin/bash

NODE_ADDRESS=${1:-"192.168.1.7"}

cat <<EOF >/opt/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=${NODE_ADDRESS} \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

EOF

cat <<EOF >/usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy

啟動指令碼:

sh ./proxy.sh 192.168.1.7
ps aux |grep proxy
報錯檢視:/var/log/message
journalctl -f -t kube-proxy     
journalctl -u kube-proxy

node02沒有出錯的話我們就去node03上操作(192.168.1.8)
同樣的重複操作:
只是將腳本里面對應的ip改成node03本機ip:

./kubelet.sh 192.168.1.8 10.10.10.2
./proxy.sh 192.168.1.8

到此叢集的安裝結束,我們測試叢集通不通

查詢叢集狀態:

[[email protected] ~]# kubectl get csr
NAME                                                   AGE       REQUESTOR           CONDITION
node-csr-0EfKRr3ZU_UVFi5O8XLASGNxTzMrIsxMHg8oHJnY3JA   4m        kubelet-bootstrap   Pending
node-csr-MTGLph0ohPwDJK6FtjJagnkjo3utvYjL1N52nBA1xRU   43m       kubelet-bootstrap   Pending

可以看到,節點 是處於等待狀態

我們檢視節點接入情況:

[[email protected] ~]# kubectl get node
No resources found.

目前沒有節點加入,我們將節點加入:

kubectl certificate approve node-csr-0EfKRr3ZU_UVFi5O8XLASGNxTzMrIsxMHg8oHJnY3JA
kubectl certificate approve node-csr-MTGLph0ohPwDJK6FtjJagnkjo3utvYjL1N52nBA1xRU

騷等片刻,我們發現節點已經加入進來:

[[email protected] ~]#  kubectl get node
NAME          STATUS     ROLES     AGE       VERSION
192.168.1.7   NotReady   <none>    2s         v1.10.7

192.168.1.8   Ready      <none>    1m         v1.10.7

檢視叢集狀態:( kubectl get componentstatus)

[[email protected] ~]#  kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
controller-manager   Healthy   ok
scheduler            Healthy   ok
etcd-1               Healthy   {"health": "true"}
etcd-2               Healthy   {"health": "true"}
etcd-0               Healthy   {"health": "true"}

/********************************END , 好他媽費勁

另外:node 狀態 NotReady 重啟一下該節點的docker : systemctl restart docker 就完事了。

上面的 Flannel 啟動 沒有報錯, 各項 引數都正常,在阿里雲上 就是ping 不同其他節點的docker。