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Update from_scratch.md (LEMMY_UI variables, and added note about failing postgresql config) (#221)
* Update from_scratch.md Updated out of date LEMMY_UI environment variables, and added caution with failing postgresql configuration * Feedback from @Nutomic and @RocketDerp * ran through prettier * resolve merge conflict * Added note about pict-rs being standalone and embeddable
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@ -12,7 +12,7 @@ Install Rust by following the instructions on [Rustup](https://rustup.rs/).
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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.**
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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).
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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).
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```bash
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apt install ffmpeg exiftool libgexiv2-dev --no-install-recommends
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@ -39,7 +39,16 @@ sudo -iu postgres psql -c "CREATE DATABASE lemmy WITH OWNER lemmy;"
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adduser lemmy --system --disabled-login --no-create-home --group
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```
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Note that currently Lemmy only supports non-SSL connections to databases. More info [here](https://github.com/LemmyNet/lemmy/issues/3007).
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Note:
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- Lemmy currently only supports non-SSL connections to databases. More info [here](https://github.com/LemmyNet/lemmy/issues/3007).
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- Your postgres config might need to be edited to allow password authentication instead of peer authentication. Simply add:
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```
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local lemmy lemmy md5
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# Add the line above.
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# Do not add the line below, it should already exist in your pg_hba.conf in some form.
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local all all peer
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```
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Minimal Lemmy config, put this in `/etc/lemmy/lemmy.hjson` (see [here](https://github.com/LemmyNet/lemmy/blob/main/config/config.hjson) for more config options). Run `chown lemmy:lemmy /etc/lemmy/ -R` to set the correct owner.
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@ -118,7 +127,7 @@ yarn build:prod
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exit
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```
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Add another systemd unit file, this time for lemmy-ui. You need to replace example.com with your actual domain. Put the file in `/etc/systemd/system/lemmy-ui.service`, then run `systemctl enable lemmy-ui` and `systemctl start lemmy-ui`.
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Add another systemd unit file, this time for lemmy-ui. You need to replace example.com with your actual domain. Put the file in `/etc/systemd/system/lemmy-ui.service`, then run `systemctl enable lemmy-ui` and `systemctl start lemmy-ui`. More UI-related variables can be [found here](https://github.com/LemmyNet/lemmy-ui#configuration).
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```
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[Unit]
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@ -130,9 +139,10 @@ Before=nginx.service
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User=lemmy
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WorkingDirectory=/var/lib/lemmy-ui
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ExecStart=/usr/bin/node dist/js/server.js
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Environment=LEMMY_INTERNAL_HOST=localhost:8536
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Environment=LEMMY_EXTERNAL_HOST=example.com
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Environment=LEMMY_HTTPS=true
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Environment=LEMMY_UI_LEMMY_INTERNAL_HOST=localhost:8536
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Environment=LEMMY_UI_LEMMY_EXTERNAL_HOST=example.com
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Environment=LEMMY_UI_HTTPS=true
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Environment=RUST_LOG=info
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Restart=on-failure
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# Hardening
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@ -207,6 +217,9 @@ systemctl restart lemmy-ui
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### Pict-rs
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If you did **not** use the `--features embed-pictrs` flag, then this script below is necessary for installing/updating Pict-rs as a standalone server.
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Otherwise, pict-rs should update with lemmy_server.
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```bash
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rustup update
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cd /var/lib/pictrs-source
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@ -214,7 +227,7 @@ git checkout main
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git pull --tags
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# check docker-compose.yml for pict-rs version used by lemmy
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# https://github.com/LemmyNet/lemmy-ansible/blob/main/templates/docker-compose.yml#L43
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git checkout v0.2.6-r2
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git checkout v0.2.6-r2 # replace with the version you want to install
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# or simply add the bin folder to your $PATH
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$HOME/.cargo/bin/cargo build --release
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cp target/release/pict-rs /usr/bin/
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