258 lines
12 KiB
Markdown
258 lines
12 KiB
Markdown
# Installing on OpenBSD
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This guide describes the installation and configuration of akkoma (and the required software to run it) on a single OpenBSD 6.6 server.
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For any additional information regarding commands and configuration files mentioned here, check the man pages [online](https://man.openbsd.org/) or directly on your server with the man command.
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{! backend/installation/generic_dependencies.include !}
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### Preparing the system
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#### Required software
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To install them, run the following command (with doas or as root):
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```
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pkg_add elixir gmake git postgresql-server postgresql-contrib cmake ffmpeg ImageMagick
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```
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Akkoma requires a reverse proxy, OpenBSD has relayd in base (and is used in this guide) and packages/ports are available for nginx (www/nginx) and apache (www/apache-httpd). Independently of the reverse proxy, [acme-client(1)](https://man.openbsd.org/acme-client) can be used to get a certificate from Let's Encrypt.
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#### Optional software
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Per [`docs/installation/optional/media_graphics_packages.md`](../installation/optional/media_graphics_packages.md):
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* ImageMagick
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* ffmpeg
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* exiftool
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To install the above:
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```
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pkg_add ImageMagick ffmpeg p5-Image-ExifTool
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```
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#### Creating the akkoma user
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Akkoma will be run by a dedicated user, \_akkoma. Before creating it, insert the following lines in login.conf:
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```
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akkoma:\
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:datasize-max=1536M:\
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:datasize-cur=1536M:\
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:openfiles-max=4096
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```
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This creates a "akkoma" login class and sets higher values than default for datasize and openfiles (see [login.conf(5)](https://man.openbsd.org/login.conf)), this is required to avoid having akkoma crash some time after starting.
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Create the \_akkoma user, assign it the akkoma login class and create its home directory (/home/\_akkoma/): `useradd -m -L akkoma _akkoma`
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#### Clone akkoma's directory
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Enter a shell as the \_akkoma user. As root, run `su _akkoma -;cd`. Then clone the repository with `git clone https://akkoma.dev/AkkomaGang/akkoma.git`. Akkoma is now installed in /home/\_akkoma/akkoma/, it will be configured and started at the end of this guide.
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#### PostgreSQL
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Start a shell as the \_postgresql user (as root run `su _postgresql -` then run the `initdb` command to initialize postgresql:
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You will need to specify pgdata directory to the default (/var/postgresql/data) with the `-D <path>` and set the user to postgres with the `-U <username>` flag. This can be done as follows:
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```
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initdb -D /var/postgresql/data -U postgres
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```
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If you are not using the default directory, you will have to update the `datadir` variable in the /etc/rc.d/postgresql script.
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When this is done, enable postgresql so that it starts on boot and start it. As root, run:
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```
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rcctl enable postgresql
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rcctl start postgresql
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```
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To check that it started properly and didn't fail right after starting, you can run `ps aux | grep postgres`, there should be multiple lines of output.
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#### httpd
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httpd will have three fuctions:
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* redirect requests trying to reach the instance over http to the https URL
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* serve a robots.txt file
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* get Let's Encrypt certificates, with acme-client
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Insert the following config in httpd.conf:
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```
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# $OpenBSD: httpd.conf,v 1.17 2017/04/16 08:50:49 ajacoutot Exp $
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ext_inet="<IPv4 address>"
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ext_inet6="<IPv6 address>"
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server "default" {
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listen on $ext_inet port 80 # Comment to disable listening on IPv4
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listen on $ext_inet6 port 80 # Comment to disable listening on IPv6
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listen on 127.0.0.1 port 80 # Do NOT comment this line
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log syslog
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directory no index
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location "/.well-known/acme-challenge/*" {
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root "/acme"
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request strip 2
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}
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location "/robots.txt" { root "/htdocs/local/" }
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location "/*" { block return 302 "https://$HTTP_HOST$REQUEST_URI" }
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}
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types {
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}
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```
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Do not forget to change *<IPv4/6 address\>* to your server's address(es). If httpd should only listen on one protocol family, comment one of the two first *listen* options.
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Create the /var/www/htdocs/local/ folder and write the content of your robots.txt in /var/www/htdocs/local/robots.txt.
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Check the configuration with `httpd -n`, if it is OK enable and start httpd (as root):
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```
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rcctl enable httpd
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rcctl start httpd
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```
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#### acme-client
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acme-client is used to get SSL/TLS certificates from Let's Encrypt.
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Insert the following configuration in /etc/acme-client.conf:
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```
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#
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# $OpenBSD: acme-client.conf,v 1.4 2017/03/22 11:14:14 benno Exp $
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#
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authority letsencrypt-<domain name> {
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#agreement url "https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf"
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api url "https://acme-v02.api.letsencrypt.org/directory"
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account key "/etc/acme/letsencrypt-privkey-<domain name>.pem"
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}
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domain <domain name> {
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domain key "/etc/ssl/private/<domain name>.key"
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domain certificate "/etc/ssl/<domain name>.crt"
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domain full chain certificate "/etc/ssl/<domain name>.fullchain.pem"
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sign with letsencrypt-<domain name>
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challengedir "/var/www/acme/"
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}
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```
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Replace *<domain name\>* by the domain name you'll use for your instance. As root, run `acme-client -n` to check the config, then `acme-client -ADv <domain name>` to create account and domain keys, and request a certificate for the first time.
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Make acme-client run everyday by adding it in /etc/daily.local. As root, run the following command: `echo "acme-client <domain name>" >> /etc/daily.local`.
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Relayd will look for certificates and keys based on the address it listens on (see next part), the easiest way to make them available to relayd is to create a link, as root run:
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```
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ln -s /etc/ssl/<domain name>.fullchain.pem /etc/ssl/<IP address>.crt
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ln -s /etc/ssl/private/<domain name>.key /etc/ssl/private/<IP address>.key
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```
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This will have to be done for each IPv4 and IPv6 address relayd listens on.
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#### relayd
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relayd will be used as the reverse proxy sitting in front of akkoma.
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Insert the following configuration in /etc/relayd.conf:
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```
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# $OpenBSD: relayd.conf,v 1.4 2018/03/23 09:55:06 claudio Exp $
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ext_inet="<IPv4 address>"
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ext_inet6="<IPv6 address>"
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table <akkoma_server> { 127.0.0.1 }
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table <httpd_server> { 127.0.0.1 }
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http protocol plerup { # Protocol for upstream akkoma server
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#tcp { nodelay, sack, socket buffer 65536, backlog 128 } # Uncomment and adjust as you see fit
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tls ciphers "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305"
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tls ecdhe secp384r1
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# Forward some paths to the local server (as akkoma won't respond to them as you might want)
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pass request quick path "/robots.txt" forward to <httpd_server>
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# Append a bunch of headers
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match request header append "X-Forwarded-For" value "$REMOTE_ADDR" # This two header and the next one are not strictly required by akkoma but adding them won't hurt
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match request header append "X-Forwarded-By" value "$SERVER_ADDR:$SERVER_PORT"
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match response header append "X-XSS-Protection" value "1; mode=block"
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match response header append "X-Permitted-Cross-Domain-Policies" value "none"
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match response header append "X-Frame-Options" value "DENY"
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match response header append "X-Content-Type-Options" value "nosniff"
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match response header append "Referrer-Policy" value "same-origin"
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match response header append "X-Download-Options" value "noopen"
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match response header append "Content-Security-Policy" value "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://CHANGEME.tld; upgrade-insecure-requests;" # Modify "CHANGEME.tld" and set your instance's domain here
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match request header append "Connection" value "upgrade"
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#match response header append "Strict-Transport-Security" value "max-age=31536000; includeSubDomains" # Uncomment this only after you get HTTPS working.
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# If you do not want remote frontends to be able to access your Akkoma backend server, comment these lines
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match response header append "Access-Control-Allow-Origin" value "*"
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match response header append "Access-Control-Allow-Methods" value "POST, PUT, DELETE, GET, PATCH, OPTIONS"
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match response header append "Access-Control-Allow-Headers" value "Authorization, Content-Type, Idempotency-Key"
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match response header append "Access-Control-Expose-Headers" value "Link, X-RateLimit-Reset, X-RateLimit-Limit, X-RateLimit-Remaining, X-Request-Id"
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# Stop commenting lines here
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}
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relay wwwtls {
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listen on $ext_inet port https tls # Comment to disable listening on IPv4
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listen on $ext_inet6 port https tls # Comment to disable listening on IPv6
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protocol plerup
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forward to <akkoma_server> port 4000 check http "/" code 200
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forward to <httpd_server> port 80 check http "/robots.txt" code 200
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}
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```
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Again, change *<IPv4/6 address\>* to your server's address(es) and comment one of the two *listen* options if needed. Also change *wss://CHANGEME.tld* to *wss://<your instance's domain name\>*.
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Check the configuration with `relayd -n`, if it is OK enable and start relayd (as root):
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```
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rcctl enable relayd
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rcctl start relayd
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```
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#### pf
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Enabling and configuring pf is highly recommended.
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In /etc/pf.conf, insert the following configuration:
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```
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# Macros
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if="<network interface>"
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authorized_ssh_clients="any"
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# Skip traffic on loopback interface
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set skip on lo
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# Default behavior
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set block-policy drop
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block in log all
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pass out quick
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# Security features
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match in all scrub (no-df random-id)
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block in log from urpf-failed
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# Rules
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pass in quick on $if inet proto icmp to ($if) icmp-type { echoreq unreach paramprob trace } # ICMP
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pass in quick on $if inet6 proto icmp6 to ($if) icmp6-type { echoreq unreach paramprob timex toobig } # ICMPv6
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pass in quick on $if proto tcp to ($if) port { http https } # relayd/httpd
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pass in quick on $if proto tcp from $authorized_ssh_clients to ($if) port ssh
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```
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Replace *<network interface\>* by your server's network interface name (which you can get with ifconfig). Consider replacing the content of the authorized\_ssh\_clients macro by, for exemple, your home IP address, to avoid SSH connection attempts from bots.
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Check pf's configuration by running `pfctl -nf /etc/pf.conf`, load it with `pfctl -f /etc/pf.conf` and enable pf at boot with `rcctl enable pf`.
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#### Configure and start akkoma
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Enter a shell as \_akkoma (as root `su _akkoma -`) and enter akkoma's installation directory (`cd ~/akkoma/`).
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Then follow the main installation guide:
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* run `mix deps.get`
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* run `MIX_ENV=prod mix pleroma.instance gen` and enter your instance's information when asked
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* copy config/generated\_config.exs to config/prod.secret.exs. The default values should be sufficient but you should edit it and check that everything seems OK.
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* exit your current shell back to a root one and run `psql -U postgres -f /home/_akkoma/akkoma/config/setup_db.psql` to setup the database.
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* return to a \_akkoma shell into akkoma's installation directory (`su _akkoma -;cd ~/akkoma`) and run `MIX_ENV=prod mix ecto.migrate`
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As \_akkoma in /home/\_akkoma/akkoma, you can now run `LC_ALL=en_US.UTF-8 MIX_ENV=prod mix phx.server` to start your instance.
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In another SSH session/tmux window, check that it is working properly by running `ftp -MVo - http://127.0.0.1:4000/api/v1/instance`, you should get json output. Double-check that *uri*'s value is your instance's domain name.
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##### Starting akkoma at boot
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An rc script to automatically start akkoma at boot hasn't been written yet, it can be run in a tmux session (tmux is in base).
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#### Create administrative user
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If your instance is up and running, you can create your first user with administrative rights with the following command as the \_akkoma user.
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```
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LC_ALL=en_US.UTF-8 MIX_ENV=prod mix pleroma.user new <username> <your@emailaddress> --admin
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```
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#### Further reading
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{! backend/installation/further_reading.include !}
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{! backend/support.include !}
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