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On Mon, 2014-04-21 at 17:15 +0800, Chen Fan wrote:
> For now, we set the migration URI from command line '--migrate_uri' or
> construct the URI by looking up the dest host's hostname which could be
> solved by DNS automatically.
>
> But in cases the dest host have two or more NICs to reach, we may need to
> send the migration data over a specific NIC which is different from the
> automatically resloved one for some reason like performance, security, etc.
> thus we must explicitly specify the migrateuri in command line everytime,
> but it is too troublesome if there are many such hosts(and don't forget
> virt-manager).
>
> This patch adds a configuration file option on dest host to save the
> default migrate uri which explicitly configure which of this host's
> addresses should be used to transfer, thus user doesn't boring to specify
> it in command line everytime.
>
> Signed-off-by: Chen Fan <chen.fan.fnst@xxxxxxxxxxxxxx>
> ---
> src/qemu/qemu.conf | 5 ++++-
> src/qemu/qemu_conf.c | 2 ++
> src/qemu/qemu_conf.h | 2 ++
> src/qemu/qemu_migration.c | 5 +++++
> 4 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf
> index f0e802f..2973631 100644
> --- a/src/qemu/qemu.conf
> +++ b/src/qemu/qemu.conf
> @@ -449,7 +449,10 @@
> #
> #seccomp_sandbox = 1
>
> -
> +# Override the URI used for any specific migration URI to be sent.
> +# Defaults to NULL, will be set to as "tcp://hostIP[:port]".
> +#
> +#migrate_uri = "tcp://hostIP:port"
>
> # Override the listen address for all incoming migrations. Defaults to
> # 0.0.0.0, or :: if both host and qemu are capable of IPv6.
> diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
> index 198ee2f..0bd943d 100644
> --- a/src/qemu/qemu_conf.c
> +++ b/src/qemu/qemu_conf.c
> @@ -576,6 +576,8 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg,
>
> GET_VALUE_STR("migration_address", cfg->migrationAddress);
>
> + GET_VALUE_STR("migrate_uri", cfg->migrateUri);
> +
> ret = 0;
>
> cleanup:
> diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
> index a36ea63..2e45421 100644
> --- a/src/qemu/qemu_conf.h
> +++ b/src/qemu/qemu_conf.h
> @@ -167,6 +167,8 @@ struct _virQEMUDriverConfig {
> char *migrationAddress;
> int migrationPortMin;
> int migrationPortMax;
> +
> + char *migrateUri;
> };
>
> /* Main driver state */
> diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
> index 593d2d3..ab64c58 100644
> --- a/src/qemu/qemu_migration.c
> +++ b/src/qemu/qemu_migration.c
> @@ -2639,6 +2639,7 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
> int ret = -1;
> virURIPtr uri = NULL;
> bool well_formed_uri = true;
> + virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
>
> VIR_DEBUG("driver=%p, dconn=%p, cookiein=%s, cookieinlen=%d, "
> "cookieout=%p, cookieoutlen=%p, uri_in=%s, uri_out=%p, "
> @@ -2649,6 +2650,10 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
>
> *uri_out = NULL;
>
> + if (uri_in == NULL && cfg->migrateUri) {
> + uri_in = cfg->migrateUri;
> + }
> +
> /* The URI passed in may be NULL or a string "tcp://somehostname:port".
> *
> * If the URI passed in is NULL then we allocate a port number
--
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