[libvirt] [PATCH RFC] Add a virt-host-validate command to sanity check HV config
Daniel P. Berrange
berrange at redhat.com
Tue Jan 10 17:33:33 UTC 2012
From: "Daniel P. Berrange" <berrange at redhat.com>
To assist people in verifying that their host is operating in an
optimal manner, provide a 'virt-host-validate' command. For each
type of hypervisor, it will check any pre-requisites, or other
good recommendations and report what's working & what is not.
eg
# virt-host-validate
QEMU: Checking for device /dev/kvm : FAIL (Check that the 'kvm-intel' or 'kvm-amd' modules are loaded & the BIOS has enabled virtualization)
QEMU: Checking for device /dev/vhost : WARN (Load the 'vhost_net' module to improve performance of virtio networking)
QEMU: Checking for device /dev/net/tun : PASS
LXC: Checking for Linux >= 2.6.26 : PASS
This warns people if they have vmx/svm, but don't have /dev/kvm. It
also warns about missing /dev/vhost net.
---
tools/Makefile.am | 25 ++++++-
tools/virt-host-validate-common.c | 166 +++++++++++++++++++++++++++++++++++++
tools/virt-host-validate-common.h | 53 ++++++++++++
tools/virt-host-validate-lxc.c | 37 ++++++++
tools/virt-host-validate-lxc.h | 27 ++++++
tools/virt-host-validate-qemu.c | 50 +++++++++++
tools/virt-host-validate-qemu.h | 27 ++++++
tools/virt-host-validate.c | 77 +++++++++++++++++
8 files changed, 461 insertions(+), 1 deletions(-)
create mode 100644 tools/virt-host-validate-common.c
create mode 100644 tools/virt-host-validate-common.h
create mode 100644 tools/virt-host-validate-lxc.c
create mode 100644 tools/virt-host-validate-lxc.h
create mode 100644 tools/virt-host-validate-qemu.c
create mode 100644 tools/virt-host-validate-qemu.h
create mode 100644 tools/virt-host-validate.c
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 6705546..2b14319 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -30,7 +30,7 @@ EXTRA_DIST = \
DISTCLEANFILES =
bin_SCRIPTS = virt-xml-validate virt-pki-validate
-bin_PROGRAMS = virsh
+bin_PROGRAMS = virsh virt-host-validate
if HAVE_SANLOCK
sbin_SCRIPTS = virt-sanlock-cleanup
@@ -64,6 +64,29 @@ virt-sanlock-cleanup: virt-sanlock-cleanup.in Makefile
virt-sanlock-cleanup.8: virt-sanlock-cleanup.in
$(AM_V_GEN)$(POD2MAN) $< $(srcdir)/$@
+virt_host_validate_SOURCES = \
+ virt-host-validate.c \
+ virt-host-validate-common.c virt-host-validate-common.h \
+ virt-host-validate-qemu.c virt-host-validate-qemu.h \
+ virt-host-validate-lxc.c virt-host-validate-lxc.h \
+ $(NULL)
+
+virt_host_validate_LDFLAGS = \
+ $(WARN_LDFLAGS) \
+ $(COVERAGE_LDFLAGS) \
+ $(NULL)
+
+virt_host_validate_LDADD = \
+ $(WARN_CFLAGS) \
+ ../src/libvirt.la \
+ ../gnulib/lib/libgnu.la \
+ $(NULL)
+
+virt_host_validate_CFLAGS = \
+ $(WARN_CFLAGS) \
+ $(COVERAGE_CFLAGS) \
+ $(NULL)
+
virsh_SOURCES = \
console.c console.h \
virsh.c
diff --git a/tools/virt-host-validate-common.c b/tools/virt-host-validate-common.c
new file mode 100644
index 0000000..7ada218
--- /dev/null
+++ b/tools/virt-host-validate-common.c
@@ -0,0 +1,166 @@
+/*
+ * virt-host-validate-common.c: Sanity check helper APis
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/utsname.h>
+
+#include "util.h"
+#include "memory.h"
+#include "virt-host-validate-common.h"
+
+void virHostMsgCheck(const char *prefix,
+ const char *format,
+ ...)
+{
+ va_list args;
+ char *msg;
+
+ va_start(args, format);
+ if (virVasprintf(&msg, format, args) < 0) {
+ perror("malloc");
+ abort();
+ }
+ va_end(args);
+
+ fprintf(stdout, "%6s: Checking %-60s: ", prefix, msg);
+ VIR_FREE(msg);
+}
+
+void virHostMsgPass(void)
+{
+ fprintf(stdout, "\033[32mPASS\033[0m\n");
+}
+
+void virHostMsgFail(virHostValidateLevel level,
+ const char *hint)
+{
+ if (level == VIR_HOST_VALIDATE_FAIL)
+ fprintf(stdout, "\033[31mFAIL\033[0m (%s)\n", hint);
+ else if (level == VIR_HOST_VALIDATE_WARN)
+ fprintf(stdout, "\033[33mWARN\033[0m (%s)\n", hint);
+ else if (level == VIR_HOST_VALIDATE_NOTE)
+ fprintf(stdout, "\033[34mNOTE\033[0m (%s)\n", hint);
+}
+
+
+int virHostValidateDevice(const char *hvname,
+ const char *devname,
+ virHostValidateLevel level,
+ const char *hint)
+{
+ virHostMsgCheck(hvname, "for device %s", devname);
+
+ if (access(devname, R_OK|W_OK) < 0) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+
+ virHostMsgPass();
+ return 0;
+}
+
+
+int virHostValidateHasCPUFlag(const char *name)
+{
+ FILE *fp = fopen("/proc/cpuinfo", "r");
+ int ret = 0;
+
+ if (!fp)
+ return 0;
+
+ do {
+ char line[1024];
+
+ if (!fgets(line, sizeof(line), fp))
+ break;
+
+ if (strstr(line, name)) {
+ ret = 1;
+ break;
+ }
+ } while (1);
+
+ fclose(fp);
+
+ return ret;
+}
+
+
+int virHostValidateLinuxKernel(const char *hvname,
+ int version,
+ virHostValidateLevel level,
+ const char *hint)
+{
+ struct utsname uts;
+ int major, minor, micro;
+
+ uname(&uts);
+
+ virHostMsgCheck(hvname, "for Linux >= %d.%d.%d",
+ ((version >> 16) & 0xff),
+ ((version >> 8) & 0xff),
+ (version & 0xff));
+
+ if (STRNEQ(uts.sysname, "Linux")) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+
+ if (sscanf(uts.release, "%d.%d.%d", &major, &minor, µ) != 3) {
+ micro = 0;
+ if (sscanf(uts.release, "%d.%d", &major, &minor) != 2) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+ }
+
+ if (major > ((version >> 16) & 0xff)) {
+ virHostMsgPass();
+ return 0;
+ } else if (major < ((version >> 16) & 0xff)) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+
+ if (minor > ((version >> 8) & 0xff)) {
+ virHostMsgPass();
+ return 0;
+ } else if (minor < ((version >> 8) & 0xff)) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+
+ if (micro > (version & 0xff)) {
+ virHostMsgPass();
+ return 0;
+ } else if (micro < (version & 0xff)) {
+ virHostMsgFail(level, hint);
+ return -1;
+ }
+
+ virHostMsgPass();
+ return 0;
+}
diff --git a/tools/virt-host-validate-common.h b/tools/virt-host-validate-common.h
new file mode 100644
index 0000000..6a4d1ac
--- /dev/null
+++ b/tools/virt-host-validate-common.h
@@ -0,0 +1,53 @@
+/*
+ * virt-host-validate-common.h: Sanity check helper APis
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __VIRT_HOST_VALIDATE_COMMON_H__
+#define __VIRT_HOST_VALIDATE_COMMON_H__
+
+#include "internal.h"
+
+typedef enum {
+ VIR_HOST_VALIDATE_FAIL,
+ VIR_HOST_VALIDATE_WARN,
+ VIR_HOST_VALIDATE_NOTE,
+} virHostValidateLevel;
+
+extern void virHostMsgCheck(const char *prefix,
+ const char *format,
+ ...) ATTRIBUTE_FMT_PRINTF(2, 3);
+
+extern void virHostMsgPass(void);
+extern void virHostMsgFail(virHostValidateLevel level,
+ const char *hint);
+
+extern int virHostValidateDevice(const char *hvname,
+ const char *devname,
+ virHostValidateLevel level,
+ const char *hint);
+
+extern int virHostValidateHasCPUFlag(const char *name);
+
+extern int virHostValidateLinuxKernel(const char *hvname,
+ int version,
+ virHostValidateLevel level,
+ const char *hint);
+
+#endif /* __VIRT_HOST_VALIDATE_COMMON_H__ */
diff --git a/tools/virt-host-validate-lxc.c b/tools/virt-host-validate-lxc.c
new file mode 100644
index 0000000..f41cf78
--- /dev/null
+++ b/tools/virt-host-validate-lxc.c
@@ -0,0 +1,37 @@
+/*
+ * virt-host-validate-lxc.c: Sanity check a LXC hypervisor host
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+
+#include "virt-host-validate-lxc.h"
+#include "virt-host-validate-common.h"
+
+int virHostValidateLXC(void)
+{
+ int ret = 0;
+
+ if (virHostValidateLinuxKernel("LXC", (2 << 16) | (6 << 8) | 26,
+ VIR_HOST_VALIDATE_FAIL,
+ "Upgrade to a kernel supporting namespaces") < 0)
+ ret = -1;
+
+ return ret;
+}
diff --git a/tools/virt-host-validate-lxc.h b/tools/virt-host-validate-lxc.h
new file mode 100644
index 0000000..3cae39f
--- /dev/null
+++ b/tools/virt-host-validate-lxc.h
@@ -0,0 +1,27 @@
+/*
+ * virt-host-validate-lxc.h: Sanity check a LXC hypervisor host
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __VIRT_HOST_VALIDATE_LXC_H__
+#define __VIRT_HOST_VALIDATE_LXC_H__
+
+extern int virHostValidateLXC(void);
+
+#endif /* __VIRT_HOST_VALIDATE_LXC_H__ */
diff --git a/tools/virt-host-validate-qemu.c b/tools/virt-host-validate-qemu.c
new file mode 100644
index 0000000..b0e4fe5
--- /dev/null
+++ b/tools/virt-host-validate-qemu.c
@@ -0,0 +1,50 @@
+/*
+ * virt-host-validate-qemu.c: Sanity check a QEMU hypervisor host
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+
+#include "virt-host-validate-qemu.h"
+#include "virt-host-validate-common.h"
+
+int virHostValidateQEMU(void)
+{
+ int ret = 0;
+
+ if (virHostValidateHasCPUFlag("svm") ||
+ virHostValidateHasCPUFlag("vmx")) {
+ if (virHostValidateDevice("QEMU", "/dev/kvm",
+ VIR_HOST_VALIDATE_FAIL,
+ "Check that the 'kvm-intel' or 'kvm-amd' modules are loaded & the BIOS has enabled virtualization") < 0)
+ ret = -1;
+ }
+
+ if (virHostValidateDevice("QEMU", "/dev/vhost",
+ VIR_HOST_VALIDATE_WARN,
+ "Load the 'vhost_net' module to improve performance of virtio networking") < 0)
+ ret = -1;
+
+ if (virHostValidateDevice("QEMU", "/dev/net/tun",
+ VIR_HOST_VALIDATE_FAIL,
+ "Load the 'tun' module to enable networking for QEMU guests") < 0)
+ ret = -1;
+
+ return ret;
+}
diff --git a/tools/virt-host-validate-qemu.h b/tools/virt-host-validate-qemu.h
new file mode 100644
index 0000000..e1dbcbe
--- /dev/null
+++ b/tools/virt-host-validate-qemu.h
@@ -0,0 +1,27 @@
+/*
+ * virt-host-validate-qemu.h: Sanity check a QEMU hypervisor host
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __VIRT_HOST_VALIDATE_QEMU_H__
+#define __VIRT_HOST_VALIDATE_QEMU_H__
+
+extern int virHostValidateQEMU(void);
+
+#endif /* __VIRT_HOST_VALIDATE_QEMU_H__ */
diff --git a/tools/virt-host-validate.c b/tools/virt-host-validate.c
new file mode 100644
index 0000000..b94aa8f
--- /dev/null
+++ b/tools/virt-host-validate.c
@@ -0,0 +1,77 @@
+/*
+ * virt-host-check.c: Sanity check a hypervisor host
+ *
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gettext.h>
+
+#include "internal.h"
+#include "configmake.h"
+
+#include "virt-host-validate-qemu.h"
+#include "virt-host-validate-lxc.h"
+
+static void
+show_help(FILE *out, const char *argv0)
+{
+ fprintf(out, "syntax: %s [OPTIONS] [HVTYPE]\n", argv0);
+}
+
+int
+main(int argc, char **argv)
+{
+ const char *hvname = NULL;
+ int ret = EXIT_SUCCESS;
+
+ if (!setlocale(LC_ALL, "")) {
+ perror("setlocale");
+ /* failure to setup locale is not fatal */
+ }
+ if (!bindtextdomain(PACKAGE, LOCALEDIR)) {
+ perror("bindtextdomain");
+ return EXIT_FAILURE;
+ }
+ if (!textdomain(PACKAGE)) {
+ perror("textdomain");
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 2) {
+ fprintf(stderr, "too many command line arguments\n");
+ show_help(stderr, argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 1)
+ hvname = argv[1];
+
+ if ((!hvname || STREQ(hvname, "qemu")) &&
+ virHostValidateQEMU() < 0)
+ ret = EXIT_FAILURE;
+
+ if ((!hvname || STREQ(hvname, "lxc")) &&
+ virHostValidateLXC() < 0)
+ ret = EXIT_FAILURE;
+
+ return ret;
+}
--
1.7.7.5
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