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      <h1 class="mume-header" id="kubernetes-%ED%81%B4%EB%9F%AC%EC%8A%A4%ED%84%B0-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">Kubernetes 클러스터 설치하기</h1>

<hr>
<p>3대 서버에 마스터 1개, 노드1, 노도2의 쿠버네티스 클러스터를 구성하기 위한 설치 방법을 설명합니다.<br>
각 서버의 호스트 이름 및 IP 는 아래와 같이 가정합니다.<br>
csle1  : 192.168.0.5 (master)<br>
csle2  : 192.168.0.6 (node1)<br>
csle3  : 192.168.0.7 (node2)</p>
<h2 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84%EC%97%90-%EA%B3%B5%ED%86%B5%EC%9C%BC%EB%A1%9C-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">모든 서버에 공통으로 설치하기</h2>

<h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-java-8-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">[모든 서버 공통] java 8 설치하기</h3>

<p><a href="https://csleoss.etri.re.kr/images/contents/manual_1.0/1.2.HowToInstallKsbToolBox.html#host-pc-java-8-oracle-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0" title="KSB &#xD234;&#xBC15;&#xC2A4; &#xC124;&#xCE58;">KSB 툴박스 설치</a>의 java-8-oracle 설치 부분을 참고합니다.</p>
<h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-%EA%B8%B0%ED%83%80-%EC%9A%B0%EB%B6%84%ED%88%AC-%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%A8-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">[모든 서버 공통] 기타 우분투 프로그램 설치하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">apt-get</span> update <span class="token operator">&amp;&amp;</span> \
<span class="token function">sudo</span> <span class="token function">apt-get</span> <span class="token function">install</span> -y --no-install-recommends apt-utils <span class="token function">curl</span> <span class="token function">bc</span> jq <span class="token operator">&amp;&amp;</span> \
<span class="token function">sudo</span> <span class="token function">apt-get</span> <span class="token function">install</span> -y <span class="token function">ssh</span> locales <span class="token function">wget</span> <span class="token function">git</span> vim <span class="token function">rsync</span> locales filezilla python3-pip <span class="token operator">&amp;&amp;</span> \
<span class="token function">sudo</span> <span class="token function">apt-get</span> <span class="token function">install</span> -y net-tools <span class="token operator">&amp;&amp;</span> \
pip3 <span class="token function">install</span> kafka-python
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-sshd-port-%EB%B3%80%EA%B2%BD-%EB%B0%8F-root-%EB%A1%9C%EA%B7%B8%EC%9D%B8-%EA%B0%80%EB%8A%A5%ED%95%98%EA%B2%8C-sshd-config-%EC%88%98%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] SSHD port 변경 및 root 로그인 가능하게 SSHD config 수정하기</h3>

<p>아래의 명령을 수행하여 포트 정보를 2243로 수정하고, root 로그인을 허용합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">sed</span> -ri <span class="token string">'s/^Port 22/Port 2243/g'</span> /etc/ssh/sshd_config
<span class="token function">sudo</span> <span class="token function">sed</span> -ri <span class="token string">'s/^PermitRootLogin prohibit-password/PermitRootLogin yes/g'</span> /etc/ssh/sshd_config
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-ssh-config-%EC%88%98%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] SSH config 수정하기</h3>

<p>SSH 접속시 known_hosts에 호스트 정보 저장 질문을 하지 않도록 설정합니다.<br>
아래의 명령을 수행하여 ssh_config의 기존 내용을 모두 삭제하고 설정을 추가합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> truncate -s0 /etc/ssh/ssh_config
<span class="token keyword">echo</span> <span class="token string">"Host localhost"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"StrictHostKeyChecking no"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"Host 0.0.0.0"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"StrictHostKeyChecking no"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"Host 127.0.0.1"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"StrictHostKeyChecking no"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"Host csle*"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"StrictHostKeyChecking no"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"UserKnownHostsFile=/dev/null"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"Host master"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"StrictHostKeyChecking no"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
<span class="token keyword">echo</span> <span class="token string">"UserKnownHostsFile=/dev/null"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> -a /etc/ssh/ssh_config <span class="token operator">></span>/dev/null
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-ssh-%EC%84%9C%EB%B9%84%EC%8A%A4-%EC%9E%AC%EC%8B%9C%EC%9E%91%ED%95%98%EA%B8%B0">[모든 서버 공통] SSH 서비스 재시작하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">service</span> <span class="token function">ssh</span> restart
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-docker-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">[모든 서버 공통] docker 설치하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">curl</span> -fsSL https://apt.dockerproject.org/gpg <span class="token operator">|</span> <span class="token function">sudo</span> apt-key add -
apt-key fingerprint 58118E89F3A912897C070ADBF76221572C52609D
add-apt-repository <span class="token string">"deb https://apt.dockerproject.org/repo/  ubuntu-xenial main"</span>
<span class="token function">apt-get</span> update
<span class="token function">apt-get</span> -y <span class="token function">install</span> docker-engine
systemctl <span class="token function">enable</span> docker
</pre><h4 class="mume-header" id="%EC%B0%B8%EA%B3%A0%EC%82%AC%ED%95%AD-%EA%B8%B0%EC%A1%B4-docker-engine-%EC%82%AD%EC%A0%9C">[참고사항] 기존 docker-engine 삭제</h4>

<p>sudo apt-get purge -y docker docker-engine <a href="http://docker.io">docker.io</a></p>
<h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-docker-sudo-%EB%AA%85%EB%A0%B9%EC%97%86%EC%9D%B4-%EC%82%AC%EC%9A%A9%ED%95%98%EA%B8%B0-%EC%9C%84%ED%95%9C-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] docker sudo 명령없이 사용하기 위한 설정하기</h3>

<p>Docker 명령시 root 권한이 필요합니다. root가 아닌 사용자가 sudo 없이 사용하려면 해당 사용자를 docker 그룹에 추가합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">usermod</span> -aG docker csle
<span class="token comment"># 사용자가 로그인 중이라면 다시 로그인 후 권한이 적용됩니다. 단, 현재 터미널에서만 적용됩니다.</span>
<span class="token function">sudo</span> <span class="token function">su</span> csle
PC 재부팅
</pre><p>PC 재부팅을 통해서 sudo 명령없이 docker 명령을 사용할 수 있습니다.</p>
<h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-kubernetes-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">[모든 서버 공통] Kubernetes 설치하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">curl</span> -s https://packages.cloud.google.com/apt/doc/apt-key.gpg <span class="token operator">|</span> <span class="token function">sudo</span> apt-key add - <span class="token operator">&amp;&amp;</span> \
<span class="token keyword">echo</span> <span class="token string">"deb http://apt.kubernetes.io/ kubernetes-xenial main"</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">tee</span> /etc/apt/sources.list.d/kubernetes.list <span class="token operator">&amp;&amp;</span> \
<span class="token function">sudo</span> <span class="token function">apt-get</span> update -q <span class="token operator">&amp;&amp;</span> \
<span class="token function">sudo</span> <span class="token function">apt-get</span> <span class="token function">install</span> -qy kubelet<span class="token operator">=</span>1.9.6-00 kubectl<span class="token operator">=</span>1.9.6-00 kubeadm<span class="token operator">=</span>1.9.6-00
kubectl version
</pre><h4 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-%EC%B0%B8%EA%B3%A0%EC%82%AC%ED%95%AD-%EA%B8%B0%EC%A1%B4-kubernetes-%EB%B2%84%EC%A0%84-%EC%82%AD%EC%A0%9C-%EB%B0%A9%EB%B2%95">[모든 서버 공통] (참고사항) 기존 Kubernetes 버전 삭제 방법</h4>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">su</span> -
kubeadm reset
<span class="token function">rm</span> /usr/local/bin/kubectl
<span class="token function">rm</span> -r /etc/kubernetes
<span class="token function">rm</span> -r /var/lib/etcd
<span class="token function">rm</span> -rf /var/lib/cni/
<span class="token function">ifconfig</span> cni0 down <span class="token operator">&amp;&amp;</span> ip <span class="token function">link</span> delete cni0
<span class="token function">ifconfig</span> flannel.1 down <span class="token operator">&amp;&amp;</span> ip <span class="token function">link</span> delete flannel.1
<span class="token function">apt-get</span> autoremove --purge -y kubelet kubeadm kubectl kubernetes-cni
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-etcfstab-%EC%88%98%EC%A0%95-%ED%9B%84-%EC%9E%AC%EB%B6%80%ED%8C%85%ED%95%98%EA%B8%B0">[모든 서버 공통] /etc/fstab 수정 후 재부팅하기</h3>

<p>쿠버네티스가 Swap 기능을 관리해야 하므로, 아래의 swap이 적용된 file 시스템 부분을 주석 처리한다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">vi</span> /etc/fstab

UUID<span class="token operator">=</span>c3ec283e-682f-4e8c-b822-43eef87a725f /               ext4    errors<span class="token operator">=</span>remount-ro 0       1
<span class="token comment"># /boot/efi was on /dev/nvme0n1p1 during installation</span>
UUID<span class="token operator">=</span>7D67-73C7  /boot/efi       vfat    umask<span class="token operator">=</span>0077      0       1
<span class="token comment"># swap was on /dev/nvme0n1p3 during installation</span>

<span class="token comment"># (주의!!!) swap 설정 해제</span>
<span class="token comment">#UUID=257a989b-d1fa-4a7c-8ae7-9ccad9b9c0c6 none            swap    sw              0       0</span>
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-kubernetes-master-etchosts-%EB%B3%80%EA%B2%BD%ED%95%98%EA%B8%B0">[모든 서버 공통] Kubernetes master /etc/hosts 변경하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">vi</span> /etc/hosts

127.0.0.1       localhost
<span class="token comment"># 아래 주석처리. Hdfs 연동시 문제가 생김.</span>
<span class="token comment">#127.0.1.1      csle1</span>

<span class="token comment"># The following lines are desirable for IPv6 capable hosts</span>
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

<span class="token comment"># 쿠버네티스 master, node1, node2 정보 등록</span>
192.168.0.5 csle1 master
192.168.0.6 csle2
192.168.0.7 csle3
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-sysctl-kernel-parameter%EA%B0%92-%EC%88%98%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] sysctl kernel parameter값 수정하기</h3>

<p>커널 차원에서 보안 및 최적화 관련 설정을 변경합니다．</p>
<p>먼저 root계정으로 변경합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~<span class="token comment"># sudo su -</span>
root@csle1:~<span class="token comment">#</span>
</pre><p>아래와 같이 설정 후 반영합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~<span class="token comment"># vi /etc/sysctl.conf</span>
<span class="token comment"># 아래의 내용을 마지막에 추가합니다.</span>
net.bridge.bridge-nf-call-iptables<span class="token operator">=</span>1
net.bridge.bridge-nf-call-ip6tables<span class="token operator">=</span>1
net.ipv4.ip_forward<span class="token operator">=</span>1
net.netfilter.nf_conntrack_max <span class="token operator">=</span> 786432

root@csle1:~<span class="token comment"># sysctl -p</span>
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-kubectl-%EB%AA%85%EB%A0%B9-%EC%98%B5%EC%85%98%EC%9D%98-%EC%9E%90%EB%8F%99-%EC%99%84%EC%84%B1-%EA%B8%B0%EB%8A%A5-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] kubectl 명령 옵션의 자동 완성 기능 설정하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~<span class="token comment"># source /etc/profile.d/bash_completion.sh</span>
root@csle1:~<span class="token comment"># source &lt;(kubectl completion bash)</span>
root@csle1:~<span class="token comment"># echo "source /etc/profile.d/bash_completion.sh" | tee -a ~/.bashrc</span>
root@csle1:~<span class="token comment"># echo "source &lt;(kubectl completion bash)" | tee -a ~/.bashrc</span>
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-security-enhanced-linux-%EB%AA%A8%EB%93%9C-disable-%ED%95%98%EA%B8%B0">[모든 서버 공통] Security Enhanced Linux 모드 disable 하기</h3>

<p>갑작스러운 리부팅 이후에 apiserver, etcd 등이 정상 기동되지 않는 경우가 자주 발생을 막기 위해 permissive로 설정합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~<span class="token comment"># apt install -y selinux-utils</span>
root@csle1:~<span class="token comment"># setenforce 0</span>
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-10-kubeadmconf-%EC%88%98%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] 10-kubeadm.conf 수정하기</h3>

<p>ExecStart= 위의 라인에 Environment 설정값을 추가합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~$ <span class="token function">vi</span> /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

<span class="token punctuation">[</span>Service<span class="token punctuation">]</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_DNS_ARGS=--cluster-dns=10.96.0.10 --cluster-domain=cluster.local"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_AUTHZ_ARGS=--authorization-mode=Webhook --client-ca-file=/etc/kubernetes/pki/ca.crt"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_CADVISOR_ARGS=--cadvisor-port=0"</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_CERTIFICATE_ARGS=--rotate-certificates=true --cert-dir=/var/lib/kubelet/pki"</span>

<span class="token comment"># 아래의 내용을 추가합니다.</span>
Environment<span class="token operator">=</span><span class="token string">"KUBELET_EXTRA_ARGS=--fail-swap-on=false --runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice"</span>

ExecStart<span class="token operator">=</span>
ExecStart<span class="token operator">=</span>/usr/bin/kubelet <span class="token variable">$KUBELET_KUBECONFIG_ARGS</span> <span class="token variable">$KUBELET_SYSTEM_PODS_ARGS</span> <span class="token variable">$KUBELET_NETWORK_ARGS</span> <span class="token variable">$KUBELET_DNS_ARGS</span> <span class="token variable">$KUBELET_AUTHZ_ARGS</span> <span class="token variable">$KUBELET_CADVISOR_ARGS</span> <span class="token variable">$KUBELET_CERTIFICATE_ARGS</span> <span class="token variable">$KUBELET_EXTRA_ARGS</span>
</pre><p>아래의 명령을 통해 kubelet을 재시작 합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~$ swapoff -a
root@csle1:~$ <span class="token function">sudo</span> systemctl daemon-reload
root@csle1:~$ <span class="token function">sudo</span> systemctl restart kubelet
root@csle1:~$ <span class="token function">sudo</span> systemctl status kubelet

● kubelet.service - kubelet: The Kubernetes Node Agent
   Loaded: loaded <span class="token punctuation">(</span>/lib/systemd/system/kubelet.service<span class="token punctuation">;</span> enabled<span class="token punctuation">;</span> vendor preset: enabled<span class="token punctuation">)</span>
  Drop-In: /etc/systemd/system/kubelet.service.d
           └─10-kubeadm.conf
   Active: activating <span class="token punctuation">(</span>auto-restart<span class="token punctuation">)</span> <span class="token punctuation">(</span>Result: exit-code<span class="token punctuation">)</span> since 수 2018-07-25 09:55:44 KST<span class="token punctuation">;</span> 3s ago
     Docs: http://kubernetes.io/docs/
  Process: 10517 ExecStart<span class="token operator">=</span>/usr/bin/kubelet <span class="token variable">$KUBELET_KUBECONFIG_ARGS</span> <span class="token variable">$KUBELET_SYSTEM_PODS_ARGS</span> <span class="token variable">$KUBELET_NETWORK_ARGS</span> <span class="token variable">$KUBELET_DNS_ARGS</span> <span class="token variable">$KUBELET_AUTHZ_ARGS</span> <span class="token variable">$KUBELET_CADVISOR</span>
 Main PID: 10517 <span class="token punctuation">(</span>code<span class="token operator">=</span>exited, status<span class="token operator">=</span>1/FAILURE<span class="token punctuation">)</span>
 7월 25 09:55:44 csle4 systemd<span class="token punctuation">[</span>1<span class="token punctuation">]</span>: kubelet.service: Unit entered failed state.
 7월 25 09:55:44 csle4 systemd<span class="token punctuation">[</span>1<span class="token punctuation">]</span>: kubelet.service: Failed with result <span class="token string">'exit-code'</span><span class="token keyword">.</span>
</pre><p>systemctl status kubelet 실행시 status=1/FAILURE로 나타나지만 무시해도 됩니다.<br>
kubeadm이 정상 실행 되면 정상화됩니다.</p>
<p>모든 노드에 대해 동일하게 설정하는 부분을 완료하였습니다.</p>
<p>master와 node들 각각에 대한 설정 방법을 설명합니다.</p>
<h2 class="mume-header" id="kubernetes-master-csle1-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">Kubernetes master (csle1) 설정하기</h2>

<h3 class="mume-header" id="master-csle1-kubeadm-%EC%B4%88%EA%B8%B0%ED%99%94%ED%95%98%EA%B8%B0">[Master: csle1] kubeadm 초기화하기</h3>

<p>자신의 ip에 맞도록 수정하고 kubeadm으로 초기화합니다. (예: master ip : 192.168.0.5)</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~$ kubeadm init --apiserver-advertise-address<span class="token operator">=</span>192.168.0.5 --pod-network-cidr<span class="token operator">=</span>10.244.0.0/16 --service-cidr 10.96.0.0/12 --token-ttl 0
</pre><p>아래와 같은 로그가 나오면서 초기화 되면 정상입니다.</p>
<pre data-role="codeBlock" data-info="" class="language-"><code>[init] Using Kubernetes version: v1.9.9
[init] Using Authorization modes: [Node RBAC]
[preflight] Running pre-flight checks.
	[WARNING FileExisting-crictl]: crictl not found in system path
[certificates] Generated ca certificate and key.
[certificates] Generated apiserver certificate and key.
[certificates] apiserver serving cert is signed for DNS names [csle1 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 129.254.xxx.xxx]
[certificates] Generated apiserver-kubelet-client certificate and key.
[certificates] Generated sa key and public key.
[certificates] Generated front-proxy-ca certificate and key.
[certificates] Generated front-proxy-client certificate and key.
[certificates] Valid certificates and keys now exist in &quot;/etc/kubernetes/pki&quot;
[kubeconfig] Wrote KubeConfig file to disk: &quot;admin.conf&quot;
[kubeconfig] Wrote KubeConfig file to disk: &quot;kubelet.conf&quot;
[kubeconfig] Wrote KubeConfig file to disk: &quot;controller-manager.conf&quot;
[kubeconfig] Wrote KubeConfig file to disk: &quot;scheduler.conf&quot;
[controlplane] Wrote Static Pod manifest for component kube-apiserver to &quot;/etc/kubernetes/manifests/kube-apiserver.yaml&quot;
[controlplane] Wrote Static Pod manifest for component kube-controller-manager to &quot;/etc/kubernetes/manifests/kube-controller-manager.yaml&quot;
[controlplane] Wrote Static Pod manifest for component kube-scheduler to &quot;/etc/kubernetes/manifests/kube-scheduler.yaml&quot;
[etcd] Wrote Static Pod manifest for a local etcd instance to &quot;/etc/kubernetes/manifests/etcd.yaml&quot;
[init] Waiting for the kubelet to boot up the control plane as Static Pods from directory &quot;/etc/kubernetes/manifests&quot;.
[init] This might take a minute or longer if the control plane images have to be pulled.
[apiclient] All control plane components are healthy after 46.007752 seconds
[uploadconfig]&#xA0;Storing the configuration used in ConfigMap &quot;kubeadm-config&quot; in the &quot;kube-system&quot; Namespace
[markmaster] Will mark node csle1 as master by adding a label and a taint
[markmaster] Master csle1 tainted and labelled with key/value: node-role.kubernetes.io/master=&quot;&quot;
[bootstraptoken] Using token: a96953.b5d1418a5099b5de
[bootstraptoken] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstraptoken] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstraptoken] Configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstraptoken] Creating the &quot;cluster-info&quot; ConfigMap in the &quot;kube-public&quot; namespace
[addons] Applied essential addon: kube-dns
[addons] Applied essential addon: kube-proxy

Your Kubernetes master has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

You should now deploy a pod network to the cluster.
Run &quot;kubectl apply -f [podnetwork].yaml&quot; with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of machines by running the following on each node
as root:

  kubeadm join --token a96953.b5d1418a5099b5de 129.254.xxx.xxx:6443 --discovery-token-ca-cert-hash sha256:648c1dd27c51edc0e90ff356f47599e1a8bee800f77ada9f23fdacd8d69e62a0

</code></pre><p>다른 노드에서 master에 접속하기 위해서 아래의 부분을 저장해 둡니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">  kubeadm <span class="token function">join</span> --token a96953.b5d1418a5099b5de 192.168.0.5:6443 --discovery-token-ca-cert-hash sha256:648c1dd27c51edc0e90ff356f47599e1a8bee800f77ada9f23fdacd8d69e62a0
</pre><h3 class="mume-header" id="master-csle1-k8s-master-%EB%85%B8%EB%93%9C-kubectl-%EC%8B%A4%ED%96%89%ED%99%98%EA%B2%BD-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">[Master: csle1] K8s master 노드 kubectl 실행환경 설정하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~$ <span class="token function">sudo</span> <span class="token function">su</span> csle
csle@csle1:~$ <span class="token function">mkdir</span> -p <span class="token variable">$HOME</span>/.kube
csle@csle1:~$ <span class="token function">yes</span> <span class="token operator">|</span> <span class="token function">sudo</span> <span class="token function">cp</span> -i /etc/kubernetes/admin.conf <span class="token variable">$HOME</span>/.kube/config
csle@csle1:~$ <span class="token function">sudo</span> <span class="token function">chown</span> <span class="token variable"><span class="token variable">$(</span><span class="token function">id</span> -u<span class="token variable">)</span></span><span class="token keyword">:</span><span class="token variable"><span class="token variable">$(</span><span class="token function">id</span> -g<span class="token variable">)</span></span> <span class="token variable">$HOME</span>/.kube/config
csle@csle1:~$ <span class="token function">export</span> KUBECONFIG<span class="token operator">=</span><span class="token variable">$HOME</span>/.kube/config
csle@csle1:~$ <span class="token keyword">echo</span> <span class="token string">"export KUBECONFIG=<span class="token variable">$HOME</span>/.kube/config"</span> <span class="token operator">|</span> <span class="token function">tee</span> -a ~/.bashrc
csle@csle1:~$ kubectl get componentstatus
</pre><h2 class="mume-header" id="kubernetes-node1-node2-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0-csle2-csle3">Kubernetes node1, node2 설정하기 (csle2, csle3)</h2>

<p>먼저 root계정으로 변경합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle2:~$ <span class="token function">sudo</span> <span class="token function">su</span> -
root@csle2:~$
</pre><h3 class="mume-header" id="csle2-csle3-kubernetes-master%EC%97%90-join-%ED%95%98%EA%B8%B0">[csle2, csle3] kubernetes master에 join 하기</h3>

<p>kublet을 재부팅합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle2:~$ swapoff -a
root@csle2:~$ <span class="token function">sudo</span> systemctl daemon-reload
root@csle2:~$ <span class="token function">sudo</span> systemctl restart kubelet
root@csle2:~$ <span class="token function">sudo</span> systemctl status kubelet
</pre><p>kubernetes master에서 init시 생성된 script와 추가 옵션을 이용해 master에 join 합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">kubeadm <span class="token function">join</span> --token c8908d.5dc02f87aca87415 192.168.0.5:6443 --discovery-token-ca-cert-hash sha256:756ac632e63878260dc6b3a3497b8ba69d29087ba0428beaea061e4f5241b29d --ignore-preflight-errors<span class="token operator">=</span>all --discovery-token-unsafe-skip-ca-verification
</pre><h2 class="mume-header" id="kubernetes-master%EC%97%90%EC%84%9C-%ED%99%95%EC%9D%B8%ED%95%98%EA%B8%B0-csle1">kubernetes master에서 확인하기 (csle1)</h2>

<h3 class="mume-header" id="master-csle1-node-%EB%B0%8F-pod-%EB%8F%99%EC%9E%91-%ED%99%95%EC%9D%B8%ED%95%98%EA%B8%B0">[Master: csle1] node 및 pod 동작 확인하기</h3>

<p>node1, node2가 join이 성공했는지 아래의 명령을 이용해서 확인합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">root@csle1:~$ <span class="token function">sudo</span> <span class="token function">su</span> csle
csle@csle1:~$ kubectl get nodes
NAME      STATUS     ROLES     AGE       VERSION
csle1     NotReady   master    5m        v1.9.6
csle2     NotReady   <span class="token operator">&lt;</span>none<span class="token operator">></span>    1m        v1.9.6
csle3     NotReady   <span class="token operator">&lt;</span>none<span class="token operator">></span>    1m        v1.9.6
</pre><h3 class="mume-header" id="master-csle1-kubernetes-%ED%81%B4%EB%9F%AC%EC%8A%A4%ED%84%B0-%ED%99%98%EA%B2%BD-%EA%B5%AC%EC%84%B1%EC%9D%84-%EC%9C%84%ED%95%9C-yaml-%ED%99%98%EA%B2%BD-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">[Master: csle1] kubernetes 클러스터 환경 구성을 위한 yaml 환경 설정하기</h3>

<p>kubernetes master에서 클러스터 환경 구성을 위한 yaml 파일들을 이용해서 서비스를 생성합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ <span class="token function">cd</span> /home/csle/ksb-csle/kubernetes/env_set
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f kube-flannel.yml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f kubernetes-dashboard.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f kubernetes-dashboard-admin-rbac.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f ServiceAccount.yml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f ClusterRoleBinding.yml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f k8s-heapster/

</pre><pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ kubectl get nodes
NAME      STATUS    ROLES     AGE       VERSION
csle1     Ready     master    5m        v1.9.6
csle2     Ready     <span class="token operator">&lt;</span>none<span class="token operator">></span>    1m        v1.9.6
csle3     Ready     <span class="token operator">&lt;</span>none<span class="token operator">></span>    1m        v1.9.6
</pre><pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ kubectl get pods --all-namespaces
kube-system   etcd-csle1                                  1/1       Running   2          1d
kube-system   kube-apiserver-csle1                        1/1       Running   2          1d
kube-system   kube-controller-manager-csle1               1/1       Running   2          1d
kube-system   kube-dns-6f4fd4bdf-vtqbt                    3/3       Running   6          1d
kube-system   kube-proxy-vwp26                            1/1       Running   2          1d
kube-system   kube-proxy-zs2sw                            1/1       Running   2          1d
kube-system   kube-scheduler-csle1                        1/1       Running   2          1d
</pre><p>클러스터 환경 구성을 위한 pod가 정상적으로 구동되었는지 확인합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl get pods --all-namespaces
NAMESPACE     NAME                                        READY     STATUS    RESTARTS   AGE
kube-system   etcd-csle1                                  1/1       Running   2          1d
kube-system   heapster-dfd674df9-bz45s                    1/1       Running   2          1d
kube-system   kube-apiserver-csle1                        1/1       Running   2          1d
kube-system   kube-controller-manager-csle1               1/1       Running   2          1d
kube-system   kube-dns-6f4fd4bdf-vtqbt                    3/3       Running   6          1d
kube-system   kube-flannel-ds-c6mpq                       1/1       Running   2          1d
kube-system   kube-flannel-ds-rc74q                       1/1       Running   2          1d
kube-system   kube-proxy-vwp26                            1/1       Running   2          1d
kube-system   kube-proxy-zs2sw                            1/1       Running   2          1d
kube-system   kube-scheduler-csle1                        1/1       Running   2          1d
kube-system   kubernetes-dashboard-5bd6f767c7-4qzj7       1/1       Running   2          1d
kube-system   monitoring-grafana-76848b566c-4n4xj         1/1       Running   2          1d
kube-system   monitoring-influxdb-6c4b84d695-ts7dk        1/1       Running   2          1d
</pre><h3 class="mume-header" id="master-csle1-ingress-%ED%99%98%EA%B2%BD-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">[Master: csle1] Ingress 환경 설정하기</h3>

<p>kubernetes master에서 ingress를 설정합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ <span class="token function">cd</span> /home/csle/ksb-csle/kubernetes/env_set
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f default-backend-for-ingress.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f configmap-nginx-ingress-controller.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f deploy-nginx-ingress-controller.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f ingress-rule.yaml
csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create -f svc-expose-by-nodeport.yaml
</pre><h3 class="mume-header" id="master-csle1-dashboard-url%EC%97%90-%EC%A0%91%EC%86%8D%ED%95%98%EA%B8%B0">[Master: csle1] Dashboard URL에 접속하기</h3>

<p>아래의 명령으로 dashboard 프록시를 동작시킵니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl create clusterrolebinding add-on-cluster-admin --clusterrole<span class="token operator">=</span>cluster-admin --serviceaccount<span class="token operator">=</span>kube-system:kubernetes-dashboard

csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl proxy --port<span class="token operator">=</span>9999 --address<span class="token operator">=</span><span class="token string">'192.168.0.5'</span> --accept-hosts<span class="token operator">=</span><span class="token string">"^*$"</span>

</pre><p>크롬을 열어 아래의 주소로 쿠버네티스 dashboard에 접속한다.</p>
<p><a href="http://192.168.0.5:9999/ui">http://192.168.0.5:9999/ui</a></p>
<p>아래에서 skip을 선택하여 dashboard에 접속합니다.</p>
<p><img src="./images/1.6.KSB_K8s_install_Guide_01.png" alt="Dashboard &#xC811;&#xC18D;&#xD558;&#xAE30;"></p>
<p><img src="./images/1.6.KSB_K8s_install_Guide_02.png" alt="Dashboard &#xC811;&#xC18D;&#xD654;&#xBA74;"></p>
<h2 class="mume-header" id="ksb-%ED%94%84%EB%A0%88%EC%9E%84%EC%9B%8C%ED%81%AC%EC%99%80-%EC%97%B0%EB%8F%99%EC%9D%84-%EC%9C%84%ED%95%9C-%ED%99%98%EA%B2%BD%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0">KSB 프레임워크와 연동을 위한 환경설정하기</h2>

<h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-ksb-%ED%88%B4%EB%B0%95%EC%8A%A4%EC%97%90-%ED%8F%AC%ED%95%A8%EB%90%9C-ssh-%EC%9D%B8%EC%A6%9D%ED%82%A4-%EA%B3%B5%EC%9C%A0%ED%95%98%EA%B8%B0">[모든 서버 공통] KSB 툴박스에 포함된 SSH 인증키 공유하기</h3>

<p>KSB 프레임워크의 엔진이 Kubernetes 마스터에 접속할때 인증 키를 묻지않도록 배포된 KSB 툴박스에 포함된 .ssh 폴더를 쿠버네티스 서버의 홈에 복사합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">cp</span> -r ~/ksb-csle/tools/.ssh/ /home/csle/
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-hadoop-%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%A8%EC%9D%84-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0">[모든 서버 공통] hadoop 프로그램을 설치하기</h3>

<p>~/ksb-csle/tools/hadoop-2.7.3 폴더를 master, node1, node2의 csle 홈 폴더에 복사합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">cp</span> -r ~/ksb-csle/tools/hadoop-2.7.3 /home/csle/
</pre><p>그리고 아래와 같이 설정합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">ln</span> -s hadoop-2.7.3 hadoop
</pre><h3 class="mume-header" id="%EB%AA%A8%EB%93%A0-%EC%84%9C%EB%B2%84-%EA%B3%B5%ED%86%B5-~bashrc-%EC%88%98%EC%A0%95%ED%95%98%EA%B8%B0">[모든 서버 공통] ~/.bashrc 수정하기</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">sudo</span> <span class="token function">vi</span> ~/.bashrc

<span class="token function">export</span> JAVA_HOME<span class="token operator">=</span>/usr/lib/jvm/java-8-oracle
<span class="token function">export</span> PATH<span class="token operator">=</span><span class="token variable">$PATH</span><span class="token keyword">:</span><span class="token variable">$JAVA_HOME</span>/bin
<span class="token function">export</span> KSB_HOME<span class="token operator">=</span>/home/csle/ksb-csle
<span class="token function">export</span> PYTHONPATH<span class="token operator">=</span>/home/csle/ksb-csle/pyML/:<span class="token variable">$PYTHONPATH</span>
<span class="token function">export</span> PYTHONPATH<span class="token operator">=</span>./:/home/csle/ksb-csle/ksblib:<span class="token variable">$PYTHONPATH</span>
<span class="token function">export</span> KUBECONFIG<span class="token operator">=</span>/home/csle/.kube/config

<span class="token function">export</span> HADOOP_HOME<span class="token operator">=</span>/home/csle/hadoop-2.7.3
<span class="token function">export</span> HADOOP_PREFIX<span class="token operator">=</span><span class="token variable">$HADOOP_HOME</span>
<span class="token function">export</span> PATH<span class="token operator">=</span><span class="token variable">$PATH</span><span class="token keyword">:</span><span class="token variable">$HADOOP_PREFIX</span>/bin
<span class="token function">export</span> PATH<span class="token operator">=</span><span class="token variable">$PATH</span><span class="token keyword">:</span><span class="token variable">$HADOOP_PREFIX</span>/sbin
<span class="token function">export</span> HADOOP_CONF_DIR<span class="token operator">=</span><span class="token variable">$HADOOP_HOME</span>/etc/hadoop
<span class="token function">export</span> HADOOP_MAPRED_HOME<span class="token operator">=</span><span class="token variable">${HADOOP_PREFIX}</span>
<span class="token function">export</span> HADOOP_COMMON_HOME<span class="token operator">=</span><span class="token variable">${HADOOP_PREFIX}</span>
<span class="token function">export</span> HADOOP_HDFS_HOME<span class="token operator">=</span><span class="token variable">${HADOOP_PREFIX}</span>
<span class="token function">export</span> YARN_HOME<span class="token operator">=</span><span class="token variable">${HADOOP_PREFIX}</span>
<span class="token function">export</span> HADOOP_COMMON_LIB_NATIVE_DIR<span class="token operator">=</span><span class="token variable">${YARN_HOME}</span>/lib/native
<span class="token function">export</span> HADOOP_OPTS<span class="token operator">=</span><span class="token string">"-Djava.library.path=<span class="token variable">$YARN_HOME</span>/lib/native"</span>


<span class="token function">source</span> ~/.bashrc
</pre><p>이상으로 쿠버네티스와 KSB 툴박스와 연동을 하기 위한 모든 준비가 완료되었습니다.</p>
<h1 class="mume-header" id="faq">FAQ</h1>

<h3 class="mume-header" id="1-%EC%84%9C%EB%B2%84-%EC%9E%AC%EB%B6%80%ED%8C%85-%ED%9B%84-connection-%EC%97%90%EB%9F%AC%EA%B0%80-%EB%B0%9C%EC%83%9D%ED%95%98%EB%8A%94-%EA%B2%BD%EC%9A%B0">1. 서버 재부팅 후, connection 에러가 발생하는 경우</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ kubectl get nodes
The connection to the server 192.168.0.5:6443 was refused - did you specify the right host or port?
</pre><ul>
<li>해결 방법</li>
</ul>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ <span class="token function">sudo</span> -i
root@csle1:~<span class="token comment"># swapoff -a</span>
root@csle1:~<span class="token comment"># exit</span>
csle@csle1:~$ <span class="token function">strace</span> -eopenat kubectl version
</pre><h3 class="mume-header" id="2-%EC%84%9C%EB%B2%84-%EC%9E%AC%EB%B6%80%ED%8C%85-%ED%9B%84-dashboard%EA%B0%80-containercreating-%EC%83%81%ED%83%9C%EB%A1%9C-%EC%97%90%EB%9F%AC%EA%B0%80-%EB%B0%9C%EC%83%9D%ED%95%9C-%EA%B2%BD%EC%9A%B0">2. 서버 재부팅 후, dashboard가 ContainerCreating 상태로 에러가 발생한 경우</h3>

<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~/ksb-csle/kubernetes/env_set$ kubectl get pods --all-namespaces
NAMESPACE     NAME                                        READY     STATUS              RESTARTS   AGE
default       default-http-backend-66fbbd8844-5dn62       1/1       Running             1          56m
default       default-http-backend-66fbbd8844-b2xld       1/1       Running             1          56m
default       nginx-ingress-controller-6857676bb9-9569x   1/1       Running             1          56m
default       nginx-ingress-controller-6857676bb9-k46f4   1/1       Running             1          56m
kube-system   etcd-csle1                                  1/1       Running             3          1d
kube-system   kube-apiserver-csle1                        1/1       Running             3          1d
kube-system   kube-controller-manager-csle1               1/1       Running             3          1d
kube-system   kube-dns-6f4fd4bdf-2b6px                    3/3       Running             3          1d
kube-system   kube-proxy-9cfj8                            1/1       Running             3          1d
kube-system   kube-proxy-dvdkx                            1/1       Running             3          1d
kube-system   kube-scheduler-csle1                        1/1       Running             3          1d
kube-system   kubernetes-dashboard-6c664cf6c5-pmpjr       1/1       ContainerCreating   1          22
</pre><p>dashboard 관련 설정파일을 이용해서 pod를 delete 후, 재생성합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">cd</span> /home/csle/ksb-csle/kubernetes/env_set
kubectl delete -f kube-flannel.yml
kubectl delete -f kubernetes-dashboard.yaml
kubectl delete -f kubernetes-dashboard-admin-rbac.yaml
kubectl delete -f ServiceAccount.yml
kubectl delete -f ClusterRoleBinding.yml
kubectl delete -f k8s-heapster/

kubectl create -f kube-flannel.yml
kubectl create -f kubernetes-dashboard.yaml
kubectl create -f kubernetes-dashboard-admin-rbac.yaml
kubectl create -f ServiceAccount.yml
kubectl create -f ClusterRoleBinding.yml
kubectl create -f k8s-heapster/
</pre><h3 class="mume-header" id="3-ksb-%ED%88%B4%EB%B0%95%EC%8A%A4-docker-%EC%BB%A8%ED%85%8C%EC%9D%B4%EB%84%88%EC%97%90%EC%84%9C-host-pc%EC%97%90-ssh-%EC%A0%91%EC%86%8D%EC%8B%9C-password%EB%A5%BC-%EB%AC%BB%EB%8A%94%EC%A7%80-%ED%99%95%EC%9D%B8%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95">3. KSB 툴박스 docker 컨테이너에서 host pc에 ssh 접속시 password를 묻는지 확인하는 방법</h3>

<p>KSB 툴박스 docker 컨테이너에서 아래의 명령을 수행하여 각 kubernete 마스터와 노드에 접속시 password를 묻는지 확인합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash">csle@csle1:~$ <span class="token function">ssh</span> -l csle csle1 -p 2243 <span class="token function">mkdir</span> -p /home/csle/ksb-csle/kubernetes/modelDB/kangnam/0001
Warning: Permanently added <span class="token string">'[csle1]:2243,[192.168.0.5]:2243'</span> <span class="token punctuation">(</span>ECDSA<span class="token punctuation">)</span> to the list of known hosts.
csle@csle1:~$
csle@csle1:~$ <span class="token function">ssh</span> -l csle csle2 -p 2243 <span class="token function">mkdir</span> -p /home/csle/ksb-csle/kubernetes/modelDB/kangnam/0001
Warning: Permanently added <span class="token string">'[csle2]:2243,[192.168.0.6]:2243'</span> <span class="token punctuation">(</span>ECDSA<span class="token punctuation">)</span> to the list of known hosts.
csle@csle1:~$
</pre><p>만약 password를 묻는다면, .ssh 폴더의 인증키가 공유되지 않은 상태입니다. password를 묻는 마스터 혹은 노드 HOST에서 대해서 아래의 절차대로 인증키를 복사하시기 바랍니다.</p>
<h4 class="mume-header" id="host-pc-ksb-%ED%88%B4%EB%B0%95%EC%8A%A4-docker-%EC%9D%B4%EB%AF%B8%EC%A7%80%EB%82%B4-ssh-%ED%82%A4%EB%A5%BC-host-pc%EC%97%90-%EB%B3%B5%EC%82%AC%ED%95%98%EA%B8%B0">[Host PC] KSB 툴박스 docker 이미지내 SSH 키를 host pc에 복사하기</h4>

<p>KSB 툴박스 docker 컨테이너의 인증키를 공유하기 위해 ksb-csle/tools 폴더에 있는 .ssh 폴더를 csle 홈에 카피합니다.</p>
<pre data-role="codeBlock" data-info="sh" class="language-bash"><span class="token function">cp</span> -r ~/ksb-csle/tools/.ssh/ /home/csle/
<span class="token function">chmod</span> 600 ~/.ssh/authorized_keys
<span class="token function">chmod</span> 600 ~/.ssh/id_rsa
<span class="token function">chmod</span> 700 ~/.ssh/
<span class="token function">rm</span> ~/.ssh/known_hosts
<span class="token function">sudo</span> <span class="token function">service</span> <span class="token function">ssh</span> restart
</pre>
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