DC/OS安裝
dc/os: https://dcos.io/
- 安裝文檔-docker：https://docs.mesosphere.com/1.11/installing/oss/custom/system-requirements/install-docker-centos/
- 安裝文檔-命令行：https://docs.mesosphere.com/1.11/installing/oss/custom/cli/
坑：
- 網上介紹的GUI-web方式安裝，在最新版裏已經棄用了，也就是沒有這個參數了。。。只能命令行來裝
- 阿裏雲centos 7.2以上OS默認安裝的docker不是xfs底層存儲，需要單獨處理（大坑）
其他都很順利
先說下安裝順序，官網上寫的不清楚（這裏以阿裏雲上的ec節點為例）：
- 確定bootstrap, master, agent這3個角色的機器分別是多少
- 去阿裏雲申請機器時，每個節點都多申請一個本地磁盤（後面要把這個本地磁盤掛載為xfs文件系統，並且讓docker使用）
- 各個節點全部升級到最新的內核
- 格式化以及掛載本地磁盤到/storage下，並且建立軟連接：/var/lib/docker，需要鏈接到/storage
- 按照dc/os安裝文檔中一步步安裝
先確定bootstrap, master, agent分別多少節點數
- bootstrap就1個，不多不少，就1個
- master：至少1個
- agent：至少1個
我這阿裏雲的配置：
- bootstrap
- 172.31.91.117
- masters
- 172.31.91.125
- agents
- 172.31.91.124
- 172.31.91.123
各個節點全部升級到最新的內核:
按照這個文檔照做，目前只做第一步到第七部，千萬不要做第八步！
https://docs.mesosphere.com/1.11/installing/oss/custom/system-requirements/install-docker-centos/
格式化以及掛載本地磁盤到/storage下，並且建立軟連接：/var/lib/docker，需要鏈接到/storage：
執行命令fdisk -l查看當前磁盤設備
Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0008d73a
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 83884031 41940992 83 Linux
Disk /dev/vdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
/dev/vda是系統盤，/dev/vdb 才是我們多申請的那個本地磁盤設備，現在要對它進行分區+xfs格式化
[root@izm5e7dqv477rmbrojabgrz ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help):
輸入p：查看主分區列表，剛開始時應該是沒有的
輸入n：新增分區，都選默認值就好
完成後，輸入w：寫入磁盤（前面都是內存操作，不會實際影響，直到w為止）
[root@izm5e7dqv477rmbrojabgrz ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/vdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x90e789fd
Device Boot Start End Blocks Id System
/dev/vdb1 2048 41943039 20970496 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
然後就是用xfs格式化這個分區
mkfs -t xfs -n ftype=1 /dev/vdb1
然後就是偉大的那步了-掛載/dev/vdb1到/storage：
mkdir /storage mount /dev/vdb1 /storage
然後，需要把docker的默認存儲文件路徑變成/storage，一種實現方式就是給/var/lib/docker建立軟鏈接到/storage
ln -sv /storage/ /var/lib/docker
OK,關鍵一步完成了，剩下的就是回到官方安裝教程，開始安裝docker
https://docs.mesosphere.com/1.11/installing/oss/custom/system-requirements/install-docker-centos/
從第八步開始安裝，安裝完後驗證方式：
[root@izm5e7dqv477rmbrojabgrz lib]# docker info Containers: 20 Running: 0 Paused: 0 Stopped: 20 Images: 2 Server Version: 1.13.1 Storage Driver: overlay Backing Filesystem: xfs Supports d_type: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host macvlan null overlay Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: aa8187dbd3b7ad67d8e5e3a15115d3eef43a7ed1 runc version: 9df8b306d01f59d3a8029be411de015b7304dd8f init version: 949e6fa Security Options: seccomp Profile: default Kernel Version: 3.10.0-862.3.3.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 7.639 GiB Name: izm5e7dqv477rmbrojabgrz ID: LA6Q:RHIV:BZCN:4T5S:QXW7:3OWY:ITSQ:GJ23:UA6C:E6CN:X2J4:7X7Y Docker Root Dir: /storage Debug Mode (client): false Debug Mode (server): false Registry: https://index.docker.io/v1/ Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false
出現這些字符就代表docker部分完成了，然後安裝（都在bootstrap機器上執行）
https://docs.mesosphere.com/1.11/installing/oss/custom/cli/
我把我這的文件目錄和內容貼出來：
[root@izm5e44dzsuwalzsalz2rkz ~]# tree genconf/ genconf/ ├── config.yaml ├── ip-detect ├── ssh_key
[root@izm5e44dzsuwalzsalz2rkz genconf]# cat config.yaml agent_list: - 172.31.91.124 - 172.31.91.123 # Use this bootstrap_url value unless you have moved the DC/OS installer assets. bootstrap_url: file:///opt/dcos_install_tmp cluster_name: ‘McKayDCOS‘ exhibitor_storage_backend: static master_discovery: static ip_detect_filename: genconf/ip-detect master_list: - 172.31.91.125 resolvers: - 8.8.4.4 - 8.8.8.8 ssh_port: 22 ssh_user: root
[root@izm5e44dzsuwalzsalz2rkz genconf]# cat ip-detect
#!/usr/bin/env bash
set -o nounset -o errexit
export PATH=/usr/sbin:/usr/bin:$PATH
echo $(ip addr show eth0 | grep -Eo ‘[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}‘ | head -1)
這裏還要配置下ssh免密登錄（因為bootstrp節點安裝的時候會ssh連接到master, agent節點）
ssh-keygen -t rsa 會出現讓你輸入密碼，千萬不能寫密碼，都為空
cp ~/.ssh/id_rsa genconf/ssh_key && chmod 0600 genconf/ssh_key 把ssh私鑰key拷貝到安裝目錄下
ssh-copy-id -i 172.31.91.125 傳播公鑰到對方節點,期間會要求輸入root密碼
ssh-copy-id -i 172.31.91.124
ssh-copy-id -i 172.31.91.123
剩下根據安裝文檔進行安裝：
https://docs.mesosphere.com/1.11/installing/oss/custom/cli/
裝完後，有幾個url：
http://47.104.244.204:8181/exhibitor/v1/ui/index.html zookeeper監控
http://47.104.244.204/#/dashboard?_k=37kze5 marathon界面
http://47.104.244.204/mesos/#/ mesos集群界面
DC/OS安裝