So what is the preferred solution now? I am a bit confused.
The status on our server with 300 users is now (in short: connection to MongDB failed):
The overall message from the Web server is
Service Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
Apache/2.4.25 (Debian) Server at chat.km3net.de Port 443
Snap status reports it’s running rocketchat-server 3.2.2:
root@pi1145:~# snap list
Name Version Rev Tracking Publisher Notes
core 16-2.44.3 9066 latest/stable canonical* core
rocketchat-server 3.2.2 1433 3.x/stable rocketchat* -
Caddy:
root@pi1145:~# service snap.rocketchat-server.rocketchat-caddy status
* snap.rocketchat-server.rocketchat-caddy.service - Service for snap application rocketchat-server.rocketchat-caddy
Loaded: loaded (/etc/systemd/system/snap.rocketchat-server.rocketchat-caddy.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2020-05-13 01:54:16 CEST; 20h ago
Process: 4037 ExecStart=/usr/bin/snap run rocketchat-server.rocketchat-caddy (code=exited, status=1/FAILURE)
Main PID: 4037 (code=exited, status=1/FAILURE)
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
Server
root@pi1145:~# service snap.rocketchat-server.rocketchat-server status
* snap.rocketchat-server.rocketchat-server.service - Service for snap application rocketchat-server.rocketchat-server
Loaded: loaded (/etc/systemd/system/snap.rocketchat-server.rocketchat-server.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-05-13 22:30:47 CEST; 2s ago
Main PID: 20632 (startRocketChat)
Tasks: 8 (limit: 4915)
CGroup: /system.slice/snap.rocketchat-server.rocketchat-server.service
|-20632 /bin/bash /snap/rocketchat-server/1433/bin/startRocketChat
`-20693 node /snap/rocketchat-server/1433/main.js
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: MongoDB shell version v3.6.14
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: connecting to: mongodb://127.0.0.1:27017/?gssapiServiceName=mongodb
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: 2020-05-13T22:30:47.559+0200 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: 2020-05-13T22:30:47.560+0200 E QUERY [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed :
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: connect@src/mongo/shell/mongo.js:263:13
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: @(connect):1:6
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: exception: connect failed
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: Checking if mongo featureCompatibilityVersion is correct, changing if not
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: exception: connect failed
May 13 22:30:47 pi1145 rocketchat-server.rocketchat-server[20632]: exception: connect failed
MongoDB
* snap.rocketchat-server.rocketchat-mongo.service - Service for snap application rocketchat-server.rocketchat-mongo
Loaded: loaded (/etc/systemd/system/snap.rocketchat-server.rocketchat-mongo.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-05-13 22:31:06 CEST; 835ms ago
Main PID: 21109 (sh)
Tasks: 4 (limit: 4915)
CGroup: /system.slice/snap.rocketchat-server.rocketchat-mongo.service
|-21109 /bin/sh /snap/rocketchat-server/1433/bin/startmongo
`-21138 mongod --bind_ip 127.0.0.1 --pidfilepath /var/snap/rocketchat-server/common/mongod.pid --smallfiles --journal --dbpath=/var/snap/rocketchat-server/common --replSet rs0
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.201+0200 I CONTROL [initandlisten] modules: none
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I CONTROL [initandlisten] build environment:
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I CONTROL [initandlisten] distarch: x86_64
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I CONTROL [initandlisten] target_arch: x86_64
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I CONTROL [initandlisten] options: { net: { bindIp: "127.0.0.1" }, processManagement: { pidFilePath: "/var/snap/rocketchat-server/common/mongod.pid" }, replicat
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I - [initandlisten] Detected data files in /var/snap/rocketchat-server/common created by the 'wiredTiger' storage engine, so setting the active storage en
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.202+0200 I STORAGE [initandlisten]
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.203+0200 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.203+0200 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
May 13 22:31:06 pi1145 rocketchat-server.rocketchat-mongo[21109]: 2020-05-13T22:31:06.204+0200 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=2402M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=
None of the migrations work:
root@pi1145:~# snap refresh rocketchat-server --channel=stable/migrate-mongo-3.2
error: requested a non-existing branch on 3.x/stable for snap "rocketchat-server":
migrate-mongo-3.2
root@pi1145:~# snap refresh rocketchat-server --channel=stable/migrate-mongo-3.4
error: requested a non-existing branch on 3.x/stable for snap "rocketchat-server":
migrate-mongo-3.4
(pi stands for Physikalisches Institut).