Chapter 38. Red Hat Enterprise Linux Atomic Host

Red Hat Enterprise Linux Atomic Host 7.1.0 allows configuring encrypted root installation in the Anaconda installer, but the system will not boot afterwards. Choosing this option in the installer is not recommended.

Red Hat Enterprise Linux Atomic Host 7.1.0 offers iSCSI support during Anaconda installation, but the current content set does not include iSCSI support, so the system will not be able to access the storage. Choosing this option in the installer is not recommended.

Due to some parsing problems in the code, the kdump utility currently saves the kernel crash drumps in the /sysroot/crash/ directory instead of in /var/crash/.

Red Hat Enterprise Linux Atomic Host 7.1.0 does not currently support systemtap, unless the host-kernel-matching packages which contain kernel-devel and other packages are installed into the rheltools container image.

Red Hat Enterprise Linux Atomic Host allocates 3GB of storage to the root partition, which includes the docker volumes. In order to support more volume space, more physical storage must be added to the system, or the root Logical Volume must be extended. The Managing Storage with Red Hat Enterprise Linux Atomic Host section from the Getting Started with Red Hat Enterprise Linux Atomic Host article describes the workaround methods for this issue.

If the ltrace command is executed inside a Super-Privileged Container (SPC) to trace a process that is running on Red Hat Enterprise Linux Atomic Host, the ltrace command is unable to locate the binary images of the shared libraries that are attached to the process to be traced. As a consequence, ltrace displays a series of error messages, similar to the following example:

Can't open /lib64/libwrap.so.0: No such file or directory
Couldn't determine base address of /lib64/libwrap.so.0
ltrace: ltrace-elf.c:426: ltelf_destroy: Assertion `(&lte->plt_relocs)->elt_size == sizeof(GElf_Rela)' failed.

Red Hat Enterprise Linux Atomic Host does not include a mechanism to customize or override the content of the host itself, for example it does not include a tool to use a custom kernel for debugging.

Red Hat Enterprise Linux Atomic Host does not include a mechanism to customize or override the content of the host itself, for example it does not include a tool to use a custom kernel for debugging.