ceph-install

单节点安装ceph （install ceph in one host） 安装ceph包的环节已省略

pg current state undersized+peered

如果 副本数配置为3 osd pool default size = 3 需要修改crushmap

# rules
rule replicated_rule {
        id 0
        type replicated
        min_size 1
        max_size 10
        step take default
        step chooseleaf firstn 0 type host
        step emit
}
将host改为osd
# rules
rule replicated_rule {
        id 0
        type replicated
        min_size 1
        max_size 10
        step take default
        step chooseleaf firstn 0 type host
        step emit
}

修改crushmap步骤

ceph osd  getcrushmap -o old.map
crushtool -d old.map -o old.txt 
crushtool -c new.txt -o new.map
ceph osd setcrushmap -i new.map