Unable to launch caddy on Ubuntu 16

Help
1

I have a stock Unbuntu 16.06 droplet from DigitalOcean. I installed caddy with the tutorial caddy file and that worked. I then pointed a domain to the server and updated the caddy file. Now no matter what I do the caddy service will not start/restart. It constantly gets:

Started Caddy HTTP/2 web server.
Network Service is not active.
Dependency failed for Wait for Network to be Configured.

even with

sudo systemctl daemon-reload
sudo systemctl reset-failed
sudo systemctl start caddy

nothing happens.

2

Hi @ahwulf, welcome to the Caddy community.

Can you let us know what your systemd unit file looks like (systemctl cat caddy)?

3

[Unit]
Description=Caddy HTTP/2 web server
Documentation=https://caddyserver.com/docs
After=network-online.target
Wants=network-online.target systemd-networkd-wait-online.service

[Service]
Restart=on-failure
StartLimitInterval=86400
StartLimitBurst=5

; User and group the process will run as.
User=www-data
Group=www-data

; Letsencrypt-issued certificates will be written to this directory.
Environment=CADDYPATH=/etc/ssl/caddy

; Always set “-root” to something safe in case it gets forgotten in the Caddyfile.
ExecStart=/usr/local/bin/caddy -log stdout -agree=true -conf=/etc/caddy/Caddyfile -root=/var
ExecReload=/bin/kill -USR1 $MAINPID

; Limit the number of file descriptors; see man systemd.exec for more limit settings.
LimitNOFILE=1048576
; Unmodified caddy is not expected to use more than that.
LimitNPROC=64

; Use private /tmp and /var/tmp, which are discarded after caddy stops.
PrivateTmp=true
; Use a minimal /dev
PrivateDevices=true
; Hide /home, /root, and /run/user. Nobody will steal your SSH-keys.
ProtectHome=true
; Make /usr, /boot, /etc and possibly some more folders read-only.
ProtectSystem=full
; … except /etc/ssl/caddy, because we want Letsencrypt-certificates there.
; This merely retains r/w access rights, it does not add any new. Must still be writable o
ReadWriteDirectories=/etc/ssl/caddy

; The following additional security directives only work with systemd v229 or later.
; They further retrict privileges that can be gained by caddy. Uncomment if you like.
; Note that you may have to add capabilities required by any plugins in use.
;CapabilityBoundingSet=CAP_NET_BIND_SERVICE
;AmbientCapabilities=CAP_NET_BIND_SERVICE
;NoNewPrivileges=true

[Install]
WantedBy=multi-user.target

4

I’m not on DigitalOcean (although I love their guides), but does their stock Ubuntu install come with systemd-networkd or does it come with NetworkManager?

You might need to change the line to the following if it’s the latter:

Wants=network-online.target networkmanager-wait-online.service
5

Now I get a different problem.

Where can caddy write a log file if its running as user www-data? All the places I’ve tried have permission denied which seems to kill the launch.

6

But without a log file it runs now. Not used to running things on linux.

7

NM I figured it out. Thanks for the help!

8

For anyone else who might be looking, my understanding is that the usual procedure is to log to stdout, which should get picked up by systemd-journald. Other than that, ensuring the directory you want to write your logs to is group-writable and group-owned by www-data is a good way to go about it.

9

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