[pve-devel] [PATCH cluster/container/manager/qemu-server/storage 0/7] combine and simplify RRD handling

[Laurențiu Leahu-Vlăducu]

I want to mention one more thing: unrelated to this patch, I somehow 
miss all my old RRD data, except for the last 1-2 days. This of course 
happened before installing the patched packages. Unfortunately, I did 
not have time yet to find out what happened. However, this also happened 
with another PVE 9 cluster, so at least I could reproduce the issue.


On 05.09.25 15:55, Aaron Lauterer wrote:
> this series does two things:
> * switch the RRD API backend to use the old RRD files is available
>    * only data for frontend graphs
>    * PNG generation
> * always use RRD files with the new 9.0 schema in pmxcfs/status.c
> * hardcode pve-TYPE-9.0 paths in the RRD api endpoints for
>    * nodes
>    * VMs
>    * CTs
>    * Storage
> 
> The motivation for the combination of old and new RRD files is that during the
> migration of old RRD files to the new ones, spikes get flattened. By combining
> the old and new RRD files, we can keep the old coarse data with all it spikes
> and only show the new much mode finer stepped data where available.
> 
> This also enables us to just write any new data into an RRD file that is
> created with the new 9.0 schema. As a result, no migration step is needed
> anymore and we can simplify the logic around the whole "does the only the old
> file exist or is the new one also present" alot in quite a few places.
> 
> This series does not remove the rrd migration tool or its dependencies. That
> still needs to happen. We want to keep the check in the pve8to9 tool, because we
> will need the additional space in any case.
> 
> cluster:
> 
> Aaron Lauterer (3):
>    rrd: fix rrd time frames
>    RRD: fetch data from old rrd file if present and needed
>    pmxcfs: status.c: always use 9.0 rrd files
> 
>   src/PVE/RRD.pm      | 162 ++++++++++++++++++++++--------
>   src/pmxcfs/status.c | 238 ++++++--------------------------------------
>   2 files changed, 153 insertions(+), 247 deletions(-)
> 
> 
> manager:
> 
> Aaron Lauterer (1):
>    status: rrddata: use fixed pve-node-9.0 path
> 
>   PVE/API2/Nodes.pm | 13 ++++++-------
>   1 file changed, 6 insertions(+), 7 deletions(-)
> 
> 
> qemu-server:
> 
> Aaron Lauterer (1):
>    status: rrddata: use fixed pve-vm-9.0 path
> 
>   src/PVE/API2/Qemu.pm | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> 
> container:
> 
> Aaron Lauterer (1):
>    status: rrddata: use fixed pve-vm-9.0 path
> 
>   src/PVE/API2/LXC.pm | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> 
> storage:
> 
> Aaron Lauterer (1):
>    status: rrddata: use fixed pve-storage-9.0 path
> 
>   src/PVE/API2/Storage/Status.pm | 9 +++++----
>   1 file changed, 5 insertions(+), 4 deletions(-)
> 
> 
> Summary over all repositories:
>    6 files changed, 176 insertions(+), 270 deletions(-)
>