This should fix issue 68: some hooks should be run on more nodes than
currently. GrowDisk runs on both nodes, remove run the post hook on the
instance's nodes, and failover and migrate run the post hook on the
source node too.

Thanks to Maxence for the initial investigation and patch.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Per issue 71, the migrate and failover need special variables for
keeping the nodes consistent during instance migrations.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Remove variables which are listed at the beginning of the section and variables
which are not declared when building hooks env.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>

Add documentation about new cluster-destroy-post hook.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Update hooks documentation with the new opcode (not deleting OP_INIT_CLUSTER
from obsolete operations because the name is different).

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Run post phase of node-remove on the removed node as well.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This patch export the cluster and node tags to the cluster verify hook
scripts. The tags are exported as a space-separated list, which allows
easy parsing from the shell (e.g. “for tag in $GANETI_CLUSTER_TAGS; do
...”) and therefore requires the previous “Don't allow spaces in tag
names” patch.

The patch also fixes a minor line length style problem.

Reviewed-by: ultrotter

This also updates the hooks document to 2.0.

Reviewed-by: ultrotter