weizhouapache commented on issue #13989:
URL: https://github.com/apache/cloudstack/issues/13989#issuecomment-5946703727
> Workaround until the libvirtd fix is available
>
> **Save this code as rados_compat.c**
>
> ```
> #define _GNU_SOURCE
>
> #include <stdio.h>
> #include <string.h>
> #include <dlfcn.h>
> #include <errno.h>
>
> typedef int (*rados_conf_set_fn)(
> void *cluster,
> const char *option,
> const char *value
> );
>
> int rados_conf_set(void *cluster, const char *option, const char *value)
> {
> static rados_conf_set_fn real_rados_conf_set = NULL;
>
> if (option && strcmp(option, "auth_supported") == 0) {
> fprintf(stderr,
> "[rados-compat] ignoring deprecated option: "
> "auth_supported=%s\n",
> value ? value : "(null)");
>
> return 0;
> }
>
> if (!real_rados_conf_set) {
> dlerror();
>
> real_rados_conf_set =
> (rados_conf_set_fn)dlsym(RTLD_NEXT, "rados_conf_set");
>
> const char *err = dlerror();
>
> if (err || !real_rados_conf_set) {
> fprintf(stderr,
> "[rados-compat] dlsym(rados_conf_set) failed: %s\n",
> err ? err : "unknown error");
>
> return -EIO;
> }
> }
>
> return real_rados_conf_set(cluster, option, value);
> }
> ```
>
> **Then compile and install it:** _gcc -shared -fPIC -O2 -Wall -Wextra -o
librados_compat.so rados_compat.c -ldl install -o root -g root -m 0755
librados_compat.so /usr/local/lib/librados_compat.so_
>
> **Preload it into libvirtd:** _systemctl edit libvirtd_
>
> ```
> [Service]
> Environment="LD_PRELOAD=/usr/local/lib/librados_compat.so"
> ```
>
> _systemctl daemon-reload systemctl restart libvirtd systemctl restart
cloudstack-agent_
@akoskuczi-bw
I applied a similar change several days ago, and the libvirt pool can be
created successfully. However, VMs cannot be deployed due to a segmentation
fault in the QEMU process.
As a workaround, I had to override the QEMU command and unset LD_PRELOAD
before running the actual QEMU process.
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