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491a385ca6
Overriding hostname in a .conf file, via base-files:
HOST_NAME="k3s-host"
hostname_pn-base-files = "${HOST_NAME}"
Is always a valid option, but if it is not configured, we can easily
have two hosts with the same name on the network, confusing adddress
assignement, etc.
This commit introduces a way to generate a unique hostname based
on the uuid of the build host, and the machine being built.
If virt-unique-hostname is added to IMAGE_FEATURES, like the following:
IMAGE_FEATURES += "virt-unique-hostname"
IMAGE_FEATURES[validitems] += "virt-unique-hostname"
Then a rootfs postprocessing hook will override hostnae to something
unique.
Note: this means your image will be reproducible on a single builder,
but not between them.
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
# This doesn't work, since it seems to be too late for sanity checking.
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# IMAGE_FEATURES[validitems] += ' ${@bb.utils.contains("DISTRO_FEATURES", "virtualization", "virt-unique-hostname; ", "",d)}'
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ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "virt-unique-hostname", "virt_gen_hostname; ", "",d)}'
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ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "virt-unique-hostname", "virt_set_hostname; ", "",d)}'
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python virt_gen_hostname() {
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import uuid
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targetname = d.getVar("VIRT_TARGETNAME")
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if targetname != None:
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return
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status, date = oe.utils.getstatusoutput("date +%d-%m-%y")
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if status:
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bb.warn("Can't get the date string for target hostname")
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uuid = ':'.join(['{:02x}'.format((uuid.getnode() >> ele) & 0xff) for ele in range(0,8*6,8)][::-1])
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if uuid:
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targetname = "%s-%s" % (d.getVar("MACHINE"), uuid.split(":")[0])
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else:
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targetname = "%s-%s" % (d.getVar("MACHINE"), date)
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d.setVar("VIRT_TARGETNAME", targetname)
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}
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virt_set_hostname() {
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echo "${VIRT_TARGETNAME}" > ${IMAGE_ROOTFS}/etc/hostname
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}
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