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why "/" in atomic fedora is readonly?

asked 2016-03-11 14:56:26 +0000

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I'm using atomic fedora 23, I learned that "/usr" in atomic should be readonly, now I noticed that "/" is readonly too, but /proc/mounts still shows it rw mount. Could anyone help me to understand how to make "/" readonly happen?

-bash-4.3# pwd

/

-bash-4.3# touch a

touch: cannot touch ‘a’: Permission denied

-bash-4.3# cat /proc/mounts | grep "\/dev\/mapper\/atomicos-root \/ "

/dev/mapper/atomicos-root / xfs rw,relatime,attr2,inode64,noquota 0 0

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answered 2016-03-15 06:35:35 +0000

Chengyuan Li gravatar image

The / has immutable flag which should be from /sysroot/ when ostree move the root.

lsattr -d /

----i----------- /

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Asked: 2016-03-11 14:56:26 +0000

Seen: 89 times

Last updated: Mar 15 '16