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From scratch updates2023 06 30 (#241)

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* reference Ubuntu 22.04, Lemmy 0.18.0, move RUST_LOG to correct service

* Build lemmy_server from github checkout

* fix sudo to be consistent with earlier example, update versions to 0.18.2

* use sudo more where needed, discuss non-privileged account for rustup and cargo compile, upgrade for lemmy_server uses git

* fix typo 'normal', be more explicit about how to upgrade already-running lemmy_server binary

* mistaken "NOTE:" left in, removed

* upgrade lemmy_server refinement

* prettier
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src/administration/from_scratch.md
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@ -1,42 +1,63 @@
# From Scratch
These instructions are written for Ubuntu 20.04.
These instructions are written for Ubuntu 20.04 / Ubuntu 22.04.
## Installation
### Lemmy Backend
It is built from source, so this may take a while, especially on slow devices. For example, Lemmy v0.12.2 takes 17 minutes to build on a dual core VPS. If you prefer prebuilt binaries, use Docker.
It is built from source, so this may take a while, especially on slow devices. For example, Lemmy v0.12.2 takes 17 minutes to build on a dual core VPS. If you prefer prebuilt binaries, use Docker or Ansible install methods.
Install Rust by following the instructions on [Rustup](https://rustup.rs/).
For the Rust compiles, it is ideal to use a non-privledged Linux account on your system.
Install Rust by following the instructions on [Rustup](https://rustup.rs/) (using a non-privledged Linux account, it will install file in that user's home folder for rustup and cargo).
Lemmy supports image hosting using [pict-rs](https://git.asonix.dog/asonix/pict-rs/). We need to install a couple of dependencies for this. You can also skip these steps if you don't require image hosting. **NOTE: Lemmy-ui will still allow users to attempt uploading images even if pict-rs is not configured, in this situation, the upload will fail and users will receive technical error messages.**
Depending on preference, pict-rs can be installed as a standalone application, or it can be embedded within Lemmy itself (see below). In both cases, pict-rs requires the `magick` command which comes with Imagemagick version 7, but Ubuntu 20.04 only comes with Imagemagick 6. So you need to install that command manually, eg from the [official website](https://imagemagick.org/script/download.php#linux).
```bash
apt install ffmpeg exiftool libgexiv2-dev --no-install-recommends
sudo apt install ffmpeg exiftool libgexiv2-dev --no-install-recommends
# save the file to a working folder it can be verified before copying to /usr/bin/
wget https://download.imagemagick.org/ImageMagick/download/binaries/magick
# compare hash with the "message digest" on the official page linked above
sha256sum magick
mv magick /usr/bin/
chmod 755 /usr/bin/magick
sudo mv magick /usr/bin/
sudo chmod 755 /usr/bin/magick
```
Compile and install Lemmy, setup database:
Install dependencies and setup database:
```bash
apt install pkg-config libssl-dev libpq-dev postgresql
# installs latest release, you can also specify one with --version
# The --locked argument uses the exact versions of dependencies specified in
# `cargo.lock`at release time. Running it without the flag will use newer minor
# release versions of those dependencies, which are not always guaranteed to compile.
# Remove the parameter `--features embed-pictrs` if you don't require image hosting.
cargo install lemmy_server --target-dir /usr/bin/ --locked --features embed-pictrs
# replace db-passwd with a randomly generated password
sudo apt install pkg-config libssl-dev libpq-dev postgresql
# replace db-passwd with a unique password of your choice
sudo -iu postgres psql -c "CREATE USER lemmy WITH PASSWORD 'db-passwd';"
sudo -iu postgres psql -c "CREATE DATABASE lemmy WITH OWNER lemmy;"
adduser lemmy --system --disabled-login --no-create-home --group
# NOTE: this may be required by migration, depending on version of Lemmy
# sudo -iu postgres psql -c "ALTER USER lemmy WITH SUPERUSER;"
# create user account on Linux for the lemmy_server application
sudo adduser lemmy --system --disabled-login --no-create-home --group
```
Tune your PostgreSQL settings to match your hardware via https://pgtune.leopard.in.ua/#/
Compile and install Lemmy, given the from-scratch intention, this will be done via GitHub checkout. This can be done by a normal unprivledged user (using the same Linux account you used for rustup).
```bash
# protobuf-compiler may be required for Ubuntu 22.04.2 installs, please report testing in lemmy-docs issues
sudo apt install protobuf-compiler
git clone https://github.com/LemmyNet/lemmy.git lemmy
cd lemmy
git checkout 0.18.2
git submodule init
git submodule update --recursive --remote
echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs"
# These instructions assume you build pictrs independent, but it is
# OPTIONAL on next command: --features embed-pictrs
cargo build --release
# copy compiled binary to destination
sudo cp target/release/lemmy_server /usr/bin/lemmy_server
```
Note:
@ -85,6 +106,7 @@ Environment=LEMMY_CONFIG_LOCATION=/etc/lemmy/lemmy.hjson
# remove these two lines if you don't need pict-rs
Environment=PICTRS_PATH=/var/lib/pictrs
Environment=PICTRS_ADDR=127.0.0.1:8080
Environment=RUST_LOG=info
Restart=on-failure
# Hardening
@ -101,7 +123,7 @@ If you did everything right, the Lemmy logs from `journalctl -u lemmy` should sh
### Install lemmy-ui (web frontend)
Install dependencies (nodejs and yarn in Ubuntu 20.04 repos are too old)
Install dependencies (nodejs and yarn in Ubuntu 20.04 / Ubuntu 22.04 repos are too old)
```bash
# https://classic.yarnpkg.com/en/docs/install/#debian-stable
@ -112,7 +134,7 @@ curl -fsSL https://deb.nodesource.com/setup_12.x | sudo -E bash -
sudo apt install nodejs yarn
```
Clone the git repo, checkout the version you want (0.16.7 in this case), and compile it.
Clone the git repo, checkout the version you want (0.18.2 in this case), and compile it.
```bash
mkdir /var/lib/lemmy-ui
@ -121,7 +143,7 @@ chown lemmy:lemmy .
# dont compile as admin
sudo -u lemmy bash
git clone https://github.com/LemmyNet/lemmy-ui.git --recursive .
git checkout 0.16.7 # replace with the version you want to install
git checkout 0.18.2 # replace with the version you want to install
yarn install --pure-lockfile
yarn build:prod
exit
@ -142,7 +164,6 @@ ExecStart=/usr/bin/node dist/js/server.js
Environment=LEMMY_UI_LEMMY_INTERNAL_HOST=localhost:8536
Environment=LEMMY_UI_LEMMY_EXTERNAL_HOST=example.com
Environment=LEMMY_UI_HTTPS=true
Environment=RUST_LOG=info
Restart=on-failure
# Hardening
@ -194,20 +215,32 @@ Now open your Lemmy domain in the browser, and it should show you a configuratio
### Lemmy
Compile and install lemmy_server changes. This compile can be done by a normal unprivledged user (using the same Linux account you used for rustup and first install of Lemmy).
```bash
# installs latest release, you can also specify one with --version
cargo install lemmy_server --target-dir /usr/bin/ --features embed-pictrs
systemctl restart lemmy
rustup update
cd lemmy
git checkout main
git pull --tags
git checkout 0.18.2 # replace with version you are updating to
git submodule update --recursive --remote
echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs"
# These instructions assume you build pictrs independent, but it is
# OPTIONAL on next command: --features embed-pictrs
cargo build --release
# copy compiled binary to destination
# the old file will be locked by the already running application, so this sequence is recommended:
sudo -- sh -c 'systemctl stop lemmy && cp target/release/lemmy_server /usr/bin/lemmy_server && systemctl start lemmy'
```
### Lemmy UI
```bash
cd /var/lib/lemmy-ui
sudo -u lemmy
sudo -u lemmy bash
git checkout main
git pull --tags
git checkout 0.12.2 # replace with the version you want to install
git checkout 0.18.2 # replace with the version you are updating to
git submodule update
yarn install --pure-lockfile
yarn build:prod