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Please post what you are backing up with your snap. The Node-Red flow data is in the config folder.

☝️ The Node-RED configuration lives in the same configuration folder as Home Assistant. If you backup your configuration of Home Assistant, it will backup the flows as well.

There's something weird going on. Or miss configuration in my part. I just rebuilt my whole setup from scratch moved it to another host, etc.

This is the structure right now (looking at in from the host):

$ pwd
# note the directory we are in which is the same as the config directory
# Is the same directory I get when I ssh into the ssh addon or the hass_cli
/usr/share/hassio/homeassistant
$ ls -l
total 12928
-rw-r--r-- 1 root root     1171 Apr 26 03:06 automations.yaml
-rw-r--r-- 1 root root     3208 Apr 26 00:13 cloud.yaml
-rw-r--r-- 1 root root     8956 Apr 26 02:00 configuration.yaml
drwxr-xr-x 2 root root     4096 Apr 25 22:22 deps
-rw-r--r-- 1 root root        0 Apr 25 22:22 groups.yaml
-rw-r--r-- 1 root root   479913 Apr 26 03:32 home-assistant.log
-rw-r--r-- 1 root root 12627968 Apr 26 03:32 home-assistant_v2.db
# Here is all the flow data stored
drwxr-xr-x 4 root root     4096 Apr 26 03:00 node-red 
# ---------------------------------------------------
-rw-r--r-- 1 root root        0 Apr 25 22:22 scenes.yaml
-rw-r--r-- 1 root root        0 Apr 25 22:22 scripts.yaml
-rw-r--r-- 1 root root      503 Apr 26 00:12 secrets.yaml
drwxr-xr-x 2 root root     4096 Apr 26 01:08 tts
-rw-r--r-- 1 root root      102 Apr 26 01:07 webostv.conf
-rw-r--r-- 1 root root    77824 Apr 26 03:25 zigbee.db

While all the other addons which get properly backed up have it's data in:

$ pwd
# Note where we are in the host
/usr/share/hassio/addons/data
ha@homeassistant:/usr/share/hassio/addons/data$ ls -l
total 32
# Every addon I have installed has it's configuration right here
# And all of them get backed up properly, I create a full snapshot download
# decompress and I get all their configuration and data but not with nodeRED
drwxr-xr-x 2 root root 4096 Apr 26 00:14 a0d7b954_nodered
drwxr-xr-x 3 root root 4096 Apr 26 00:21 a0d7b954_sonweb
drwxr-xr-x 2 root root 4096 Apr 26 00:14 a0d7b954_sqlite-web
drwxr-xr-x 3 root root 4096 Apr 25 23:56 a0d7b954_ssh
drwxr-xr-x 3 root root 4096 Apr 26 00:15 core_almond
drwxr-xr-x 2 root root 4096 Apr 25 23:53 core_check_config
drwxr-xr-x 2 root root 4096 Apr 26 00:14 core_configurator
drwxr-xr-x 2 root root 4096 Apr 26 03:27 core_mosquitto
# Here I list the nodeRED folder and that's all there is
$ ls -l a0d7b954_nodered/
$ -rw-r--r-- 1 root root 409 Apr 26 03:24 options.json
# options.json and when I do a full snapshot that's the only thing 
# that's backed up from node red, none of my flows are backed up.

# All the data that has my flows is in 
$ pwd
/usr/share/hassio/homeassistant/node-red
$ ls -la
total 156
drwxr-xr-x 4 root root  4096 Apr 26 03:00 .
drwxr-xr-x 7 root root  4096 Apr 26 03:43 ..
-rw-r--r-- 1 root root 35479 Apr 26 01:01 .config.json
-rw-r--r-- 1 root root 35231 Apr 26 01:00 .config.json.backup
-rw-r--r-- 1 root root   720 Apr 26 02:59 flows_cred.json
-rw-r--r-- 1 root root   668 Apr 26 02:59 .flows_cred.json.backup
-rw-r--r-- 1 root root 17245 Apr 26 03:24 flows.json
-rw-r--r-- 1 root root 17247 Apr 26 02:59 .flows.json.backup
drwxr-xr-x 3 root root  4096 Apr 26 01:00 lib
-rw-r--r-- 1 root root     2 Apr 26 02:57 node-red-contrib-home-assistant-websocket.json
drwxr-xr-x 2 root root  4096 Apr 26 01:00 nodes
-rw-r--r-- 1 root root   145 Apr 26 01:01 package.json
-rw-r--r-- 1 root root    85 Apr 26 01:01 package-lock.json
-rw-r--r-- 1 root root  7694 Apr 26 01:00 settings.js

I don't know the proccess homeassistant does when backing up, but doesn't seem to me like it's picking up node-red folder in the middle of my config directory.

If I'm not clear, or you have any doubts let me know, I tried my best. As I said this is a new install, new host, new VM, no restoring from previous snapshot, just setting up from zero. And this is the behavior I'm getting

Ok so I just checked and indeed when the snapshot is created. nodeRED data is stored in /config/node-red as declared in the code: https://github.com/hassio-addons/addon-node-red/blob/3b759e48f93d39acda627ead7a5ed6e7b4fc546a/node-red/rootfs/etc/node-red/config.js#L16 So when I create a full snapshot I can get the flow data from extracting the homeassistant.tar.gz which is great!

But I wonder if that hinders the ability of ha to restore only nodeRED if needed as ha has the option: $ ha snapshots restore c1a07617 --addons a0d7b954_nodered Since I would figure that the logic of ha snapshot restore wouldn't know that node-red files are backed up as homeassistant core files. And it would only extract the logical a0d7b954_nodered.tar.gz which has no data but options.json

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