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Learning Ceph - Second Edition by Karan Singh, Vaibhav Bhembre, Anthony D'Atri

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Admin sockets

Each Ceph daemon (and client if so enabled) listens on an admin socket for requests to get or set information or to perform certain actions. We can see these sockets in /var/run/ceph; here are examples from both OSD and MON nodes.

osd-1701# ls /var/run/ceph
ceph-osd.0.asok   ceph-osd.10.asok  ceph-osd.11.asok
ceph-osd.12.asok  ceph-osd.13.asok  ceph-osd.14.asok
ceph-osd.15.asok  ceph-osd.16.asok  ceph-osd.17.asok
ceph-osd.18.asok  ceph-osd.19.asok  ceph-osd.1.asok
ceph-osd.20.asok  ceph-osd.21.asok  ceph-osd.22.asok
ceph-osd.23.asok  ceph-osd.2.asok   ceph-osd.3.asok
ceph-osd.4.asok   ceph-osd.5.asok   ceph-osd.69.asok
ceph-osd.7.asok   ceph-osd.8.asok   ceph-osd.9.asok
    
mon-05# ls /var/run/ceph
ceph-mon.mon05.asok
  

To interact with osd.69 we first ...

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