部署踩了一些坑，这里暂且不记录部署的过程，主要是一些坑
1、pip安装问题
我这里是在centos7.9系统，内核4.18上安装，执行了yum install python-pip之后默认下载的也是python2版本的pip，版本是8.x，但是使用pip安装软件时会提示升级到21版本，实际上python2.7不支持pip的21版本，安装的时候总是报错（说实话执行也用过是ok的，但现在不行了，一直报错），比如我就执行了下面的命令，实际上没有一个是成功的
pip install --upgrade pip
pip install --upgrade pip -i https://pypi.douban.com/simple
python -m pip install -i https://pypi.douban.com/simple --upgrade --force pip
按照网上的方法尝试没一个好的，后来求助了谷歌，才得到了21版本不支持python2.7的问题，珍爱生命，远离百度！！！
解决方法，升级到20版本，步骤如下所示：
wget https://files.pythonhosted.org/packages/0b/f5/be8e741434a4bf4ce5dbc235aa28ed0666178ea8986ddc10d035023744e6/pip-20.2.4.tar.gz
tar xf pip-20.2.4.tar.gz
cd pip-20.2.4
python setup.py install
成功解决，这个版本足够安装软件了
2、ceph-deploy报错remoto.connection.needs_ssh
实际上我这里出现这个问题是因为源的问题，我没有加上阿里云的ceph源，只有阿里云的base和epel源，这是不行的
cat >/etc/yum.repos.d/ceph.repo<<eof
[Ceph-SRPMS]
name=Ceph SRPMS packages
baseurl=https://mirrors.aliyun.com/ceph/rpm-jewel/el7/SRPMS/
enabled=1
gpgcheck=0
type=rpm-md
[Ceph-aarch64]
name=Ceph aarch64 packages
baseurl=https://mirrors.aliyun.com/ceph/rpm-jewel/el7/aarch64/
enabled=1
gpgcheck=0
type=rpm-md
[Ceph-noarch]
name=Ceph noarch packages
baseurl=https://mirrors.aliyun.com/ceph/rpm-jewel/el7/noarch/
enabled=1
gpgcheck=0
type=rpm-md
[Ceph-x86_64]
name=Ceph x86_64 packages
baseurl=https://mirrors.aliyun.com/ceph/rpm-jewel/el7/x86_64/
enabled=1
gpgcheck=0
type=rpm-md
eof
这里顺便把ceph的源放在这里，供后面使用。
此时卸载掉之前的ceph-deploy，重新再次安装，执行即可，就没有报错了。
[root@master my-cluster]# ceph-deploy new ceph-node1 ceph-node2 ceph-node3
[ceph_deploy.conf][DEBUG ] found configuration file at: /root/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.39): /usr/bin/ceph-deploy new ceph-node1 ceph-node2 ceph-node3
[ceph_deploy.cli][INFO ] ceph-deploy options:
[ceph_deploy.cli][INFO ] username : None
[ceph_deploy.cli][INFO ] func : <function new at 0x7fbdd6bfb668>
[ceph_deploy.cli][INFO ] verbose : False
[ceph_deploy.cli][INFO ] overwrite_conf : False
[ceph_deploy.cli][INFO ] quiet : False
[ceph_deploy.cli][INFO ] cd_conf : <ceph_deploy.conf.cephdeploy.Conf instance at 0x7fbdd6377488>
[ceph_deploy.cli][INFO ] cluster : ceph
[ceph_deploy.cli][INFO ] ssh_copykey : True
[ceph_deploy.cli][INFO ] mon : ['ceph-node1', 'ceph-node2', 'ceph-node3']
[ceph_deploy.cli][INFO ] public_network : None
[ceph_deploy.cli][INFO ] ceph_conf : None
[ceph_deploy.cli][INFO ] cluster_network : None
[ceph_deploy.cli][INFO ] default_release : False
[ceph_deploy.cli][INFO ] fsid : None
[ceph_deploy.new][DEBUG ] Creating new cluster named ceph
[ceph_deploy.new][INFO ] making sure passwordless SSH succeeds
[ceph-node1][DEBUG ] connected to host: master
[ceph-node1][INFO ] Running command: ssh -CT -o BatchMode=yes ceph-node1
[ceph-node1][DEBUG ] connected to host: ceph-node1
[ceph-node1][DEBUG ] detect platform information from remote host
[ceph-node1][DEBUG ] detect machine type
[ceph-node1][DEBUG ] find the location of an executable
[ceph-node1][INFO ] Running command: /usr/sbin/ip link show
[ceph-node1][INFO ] Running command: /usr/sbin/ip addr show
[ceph-node1][DEBUG ] IP addresses found: [u'192.168.50.128']
[ceph_deploy.new][DEBUG ] Resolving host ceph-node1
[ceph_deploy.new][DEBUG ] Monitor ceph-node1 at 192.168.50.128
[ceph_deploy.new][INFO ] making sure passwordless SSH succeeds
[ceph-node2][DEBUG ] connected to host: master
[ceph-node2][INFO ] Running command: ssh -CT -o BatchMode=yes ceph-node2
[ceph-node2][DEBUG ] connected to host: ceph-node2
[ceph-node2][DEBUG ] detect platform information from remote host
[ceph-node2][DEBUG ] detect machine type
[ceph-node2][DEBUG ] find the location of an executable
[ceph-node2][INFO ] Running command: /usr/sbin/ip link show
[ceph-node2][INFO ] Running command: /usr/sbin/ip addr show
[ceph-node2][DEBUG ] IP addresses found: [u'192.168.50.131']
[ceph_deploy.new][DEBUG ] Resolving host ceph-node2
[ceph_deploy.new][DEBUG ] Monitor ceph-node2 at 192.168.50.131
[ceph_deploy.new][INFO ] making sure passwordless SSH succeeds
[ceph-node3][DEBUG ] connected to host: master
[ceph-node3][INFO ] Running command: ssh -CT -o BatchMode=yes ceph-node3
[ceph-node3][DEBUG ] connected to host: ceph-node3
[ceph-node3][DEBUG ] detect platform information from remote host
[ceph-node3][DEBUG ] detect machine type
[ceph-node3][DEBUG ] find the location of an executable
[ceph-node3][INFO ] Running command: /usr/sbin/ip link show
[ceph-node3][INFO ] Running command: /usr/sbin/ip addr show
[ceph-node3][DEBUG ] IP addresses found: [u'192.168.50.132']
[ceph_deploy.new][DEBUG ] Resolving host ceph-node3
[ceph_deploy.new][DEBUG ] Monitor ceph-node3 at 192.168.50.132
[ceph_deploy.new][DEBUG ] Monitor initial members are ['ceph-node1', 'ceph-node2', 'ceph-node3']
[ceph_deploy.new][DEBUG ] Monitor addrs are ['192.168.50.128', '192.168.50.131', '192.168.50.132']
[ceph_deploy.new][DEBUG ] Creating a random mon key...
[ceph_deploy.new][DEBUG ] Writing monitor keyring to ceph.mon.keyring...
[ceph_deploy.new][DEBUG ] Writing initial config to ceph.conf...
很不错。如果还是报错，请更换ceph的版本。