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Building HA Kubernetes Clusters with RKE
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Kazumichi Yamamoto
April 20, 2018
Technology
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Building HA Kubernetes Clusters with RKE
Slide for #RancherMeetup at Osaka,Japan
Kazumichi Yamamoto
April 20, 2018
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Transcript
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`$SFBUFLTDMVTUFS XJUIFYJTUJOHEPDLFS &YJTUJOHEPDLFS 3,& LPOUBJOFSFOHJOF 1SPWJTJPOJOHLTDMVTUFS
)PXUPXPSL
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n %PDLFS n 0QFO44) n .FNCFSPGlEPDLFSzHSPVQ n 0QFO1PSUT CFUXFFOOPEFT n
%JTBCMF4XBQ XPSLFSOPEFT 1SFSFRVJTJUFTGPSOPEFT
)PXUPXPSL FUDE LVCFBQJTFSWFS LVCFDPOUSPMMFS TDIFEVMFS LVCFMFU DOJ &UD (FOFSBUFLFZQBJSBOEDFSU GPSYBVUI
1SPWJTJPOJOHLTDPNQPOFOUT DMVTUFSZNM 44)
)PXUPVTF
*OTUBMM3,& $SFBUFDMVTUFSZNM 3VOlSLF VQz )PXUPVTF
n %PXOMPBE3,&CJOBSZ *OTUBMM3,& $ curl -L -o rke $RKE_URL n
3VODINPE $ chmod +x rke 3,&@63-IUUQTHJUIVCDPNSBODIFSSLFSFMFBTFTEPXOMPBEWSLF@EBSXJOBNE
n .JOJNBMDMVTUFSZNM $SFBUFDMVTUFSZNM node: - address: 1.2.3.4 user: ubuntu role:
[etcd, controlplane, worker]
3VOlSLF VQz $ ./rke up --config cluster.yml
n DMVTUFSZNM /PEFSPMFT node: - address: 1.2.3.4 user: ubuntu role:
[etcd, controlplane, worker]
/PEFSPMFT DMVTUFSZNM 3BODIFS8FC6*
3VOOJOHDPOUBJOFSTQFSSPMF SPMFFUDE FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ SPMF DPOUSPMQMBOF DOJ
LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS DPOUSPMMFSNBOBHFS TDIFEVMFS SPMFXPSLFS DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ
)"$MVTUFSXJUI
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
3FEVOEBOUXPSLFST n .VMUJQMFXPSLFSQSPWJTJPOJOH node: - address: 192.2.0.1 role: [controlplane, etcd]
- address: 192.2.0.2 role: [worker] - address: 192.2.0.3 role: [worker] - address: 192.2.0.4 role: [worker]
FUDE SPMFDPOUSPMQMBOF FUDE DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS DPOUSPMMFSNBOBHFS TDIFEVMFS
SPMFXPSLFS DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ 3FEVOEBOUXPSLFST SPMFXPSLFS DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ SPMFXPSLFS DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
n .VMUJQMFFUDE QSPWJTJPOJOH node: - address: 192.2.0.1 role: [etcd, controlplane,
workers] - address: 192.2.0.2 role: [etcd, controlplane, workers] - address: 192.2.0.3 role: [etcd, controlplane, workers] FUDE $MVTUFSJOH
FUDE $MVTUFSJOH n FUDE CPPUTUSBQDPOGJHVSBUJPO $ docker inspect etcd ...
--initial-cluster= etcd-node1=https://192.2.0.1:2380, etcd-node2=https://192.2.0.2:2380, etcd-node3=https://192.2.0.3:2380
FUDE $MVTUFSJOH n "1*4FSWFSTCPPUTUSBQDPOGJHVSBUJPO $ docker inspect kube-apiserver ... --etcd-servers=
https://192.2.0.1:2379, https://192.2.0.2:2379, https://192.2.0.3:2379
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
n .VMUJQMFDPOUSPMQMBOF QSPWJTJPOJOH node: - address: 192.2.0.1 role: [etcd, controlplane,
workers] - address: 192.2.0.2 role: [etcd, controlplane, workers] - address: 192.2.0.3 role: [etcd, workers] 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS
DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ FUDE BQJTFSWFS FUDE 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS
DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ FUDE BQJTFSWFS FUDE n 2VFTUJPO8IJDI"1*4FSWFSEPFTLVCFMFU VTF ? ? ? 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS
DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ FUDE BQJTFSWFS FUDE n "OTXFS6TF3,&OHJOYQSPYZ 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST https://127.0.0.1:6443 https://127.0.0.1:6443
n "OTXFS6TF3,&OHJOYQSPYZ $ cat /etc/kubernetes/ssl/kubecfg-kube-node.yaml apiVersion: v1 kind: Config clusters:
- cluster: api-version: v1 server: "https://127.0.0.1:6443" name: "local" 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
n .VMUJQMFDPOUSPMQMBOF QSPWJTJPOJOH node: - address: 192.2.0.1 role: [etcd, controlplane,
workers] - address: 192.2.0.2 role: [etcd, controlplane, workers] - address: 192.2.0.3 role: [etcd, controlplane, workers] TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO
FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS
DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ FUDE BQJTFSWFS FUDE TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO BQJTFSWFS DPOUSPMMFSNBOBHFS TDIFEVMFS DPOUSPMMFSNBOBHFS TDIFEVMFS DPOUSPMMFSNBOBHFS TDIFEVMFS
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO
n MFBEFSFMFDUGMBH TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO $ docker inspect kube-scheduler ... --leader-elect=true $
docker inspect kube-controller-manager ... --leader-elect=true
FUDE LVCFQSPYZ DOJ LVCFMFU SLFOHJOYQSPYZ DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ BQJTFSWFS
DOJ LVCFQSPYZ LVCFMFU SLFOHJOYQSPYZ FUDE BQJTFSWFS FUDE TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO BQJTFSWFS DPOUSPMMFSNBOBHFS TDIFEVMFS
3FEVOEBOUXPSLFST FUDE $MVTUFSJOH 3FQMJDBUFE -PBE#BMBODFE "1*4FSWFST
TDIFEVMFSDUSMNBOBHFS-FBEFS&MFDUJPO 3FRVJSFEGPS)"DMVTUFS #VJMEJOH)JHI"WBJMBCJMJUZ$MVTUFST IUUQTLVCFSOFUFTJPEPDTBENJOIJHIBWBJMBCJMJUZCVJMEJOH
JT)"3FBEZ
3FNBJOJOH*TTVFT
1SFSFRVJTJUFTGPSOPEFT n %PDLFS n 0QFO44) n .FNCFSPGlEPDLFSzHSPVQ n 0QFO1PSUT CFUXFFOOPEFT
n %JTBCMF4XBQ XPSLFSOPEFT *TUIFSFBNPSFCFUUFSXBZ
3,&XJUI5FSSBGPSN 5FSSBGPSNQSPWJEFSQMVHJOGPS3,& IUUQTHJUIVCDPNZBNBNPUPGFCDUFSSBGPSNQSPWJEFSSLF
$IFDLJUPVU IUUQTSBODIFSKQDPOOQBTTDPNFWFOU
&OKPZ