Merge pull request #110 from theta42/ops/install-idempotent-symlinks
Make install.sh idempotent; symlink config from the repo
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Regular → Executable
+100
-37
@@ -1,52 +1,115 @@
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#!/usr/bin/env bash
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#
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# Install / update the Theta42 proxy on a fresh or existing host.
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#
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# This script is idempotent: run it to install, and re-run it to update. It
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# installs system dependencies (Node, OpenResty, Redis, Lua modules), force-syncs
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# the repo at $REPO_DIR to its remote branch, and symlinks the OpenResty and
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# systemd config straight from the repo. Because the config is symlinked, an
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# update is just "sync the repo + reload" -- the files under /etc always track
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# the repo, so there is nothing to re-copy.
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#
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# Intended to be driven by CI/CD with no human writes on prod: the checkout is
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# hard-reset to origin/$BRANCH on every run, so the box deterministically mirrors
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# the repo (any drift on the box is discarded).
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#
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# Usage: sudo ./install.sh (override with REPO_URL=, REPO_DIR=, BRANCH=)
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set -euo pipefail
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# Never block on an interactive git credential prompt in CI.
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export GIT_TERMINAL_PROMPT=0
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apt install libpam0g-dev build-essential redis-server luarocks --no-install-recommends wget gnupg ca-certificates curl git -y
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REPO_URL="${REPO_URL:-https://github.com/theta42/proxy.git}"
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REPO_DIR="${REPO_DIR:-/var/www/proxy}"
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BRANCH="${BRANCH:-master}"
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NODE_MAJOR=22
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curl sudo apt-get update && sudo apt-get install -y ca-certificates curl gnupg
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curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
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NODE_MAJOR=20
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echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | sudo tee /etc/apt/sources.list.d/nodesource.list
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if [ "$(id -u)" -ne 0 ]; then
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echo "This script must be run as root (try: sudo $0)" >&2
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exit 1
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fi
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sudo apt-get install -y nodejs
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# Symlink $1 -> $2, replacing whatever is already at $2 (idempotent).
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link(){
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ln -sfn "$1" "$2"
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echo "linked $2 -> $1"
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}
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echo "deb http://openresty.org/package/ubuntu $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/openresty.list
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echo "==> Base packages"
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apt-get update
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apt-get install -y --no-install-recommends \
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libpam0g-dev build-essential redis-server luarocks \
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wget gnupg ca-certificates curl git lsb-release
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sudo apt-get -y install --no-install-recommends wget gnupg ca-certificates #cert
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echo "==> Node.js ${NODE_MAJOR}.x apt source"
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install -d -m 0755 /etc/apt/keyrings
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curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key \
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| gpg --dearmor --yes -o /etc/apt/keyrings/nodesource.gpg
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echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${NODE_MAJOR}.x nodistro main" \
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> /etc/apt/sources.list.d/nodesource.list
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wget -O - https://openresty.org/package/pubkey.gpg | sudo gpg --dearmor -o /usr/share/keyrings/openresty.gpg #importing gpg key
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echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/openresty.gpg] http://openresty.org/package/ubuntu $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/openresty.list > /dev/null
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echo "==> OpenResty apt source"
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wget -qO- https://openresty.org/package/pubkey.gpg \
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| gpg --dearmor --yes -o /usr/share/keyrings/openresty.gpg
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echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/openresty.gpg] http://openresty.org/package/ubuntu $(lsb_release -sc) main" \
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> /etc/apt/sources.list.d/openresty.list
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sudo apt-get update
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echo "==> Install Node.js + OpenResty"
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apt-get update
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apt-get install -y nodejs openresty
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sudo apt-get -y install openresty
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echo "==> Lua modules"
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luarocks install lua-resty-auto-ssl
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luarocks install luasocket
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echo "==> Fallback SSL cert"
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install -d /etc/ssl
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if [ ! -f /etc/ssl/resty-auto-ssl-fallback.crt ]; then
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openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 \
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-subj '/CN=sni-support-required-for-valid-ssl' \
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-keyout /etc/ssl/resty-auto-ssl-fallback.key \
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-out /etc/ssl/resty-auto-ssl-fallback.crt
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else
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echo "fallback cert already present, skipping"
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fi
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sudo luarocks install lua-resty-auto-ssl
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sudo luarocks install luasocket
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echo "==> Repo checkout at ${REPO_DIR} (branch ${BRANCH})"
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install -d "$(dirname "$REPO_DIR")"
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if [ -d "$REPO_DIR/.git" ]; then
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# Force the box to match the remote branch exactly. No human edits configs
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# on prod, so discarding local drift is the desired, deterministic behavior.
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git -C "$REPO_DIR" fetch --prune origin
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git -C "$REPO_DIR" checkout -B "$BRANCH" "origin/$BRANCH"
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git -C "$REPO_DIR" reset --hard "origin/$BRANCH"
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git -C "$REPO_DIR" clean -fd
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else
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git clone --branch "$BRANCH" "$REPO_URL" "$REPO_DIR"
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fi
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mkdir /etc/ssl/
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echo "==> Symlink config from the repo"
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install -d /etc/openresty/sites-enabled /var/log/nginx
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link "$REPO_DIR/ops/nginx_conf/nginx.conf" /etc/openresty/nginx.conf
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link "$REPO_DIR/ops/nginx_conf/autossl.conf" /etc/openresty/autossl.conf
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link "$REPO_DIR/ops/nginx_conf/proxy.conf" /etc/openresty/sites-enabled/000-proxy
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link "$REPO_DIR/ops/nginx_conf/targetinfo.lua" /usr/local/openresty/lualib/targetinfo.lua
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link "$REPO_DIR/ops/proxy.service" /etc/systemd/system/proxy.service
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openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 -subj '/CN=sni-support-required-for-valid-ssl' -keyout /etc/ssl/resty-auto-ssl-fallback.key -out /etc/ssl/resty-auto-ssl-fallback.crt
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echo "==> Node dependencies"
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# Deterministic, production-only install from the lockfile. Falls back to a
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# plain install if the lockfile and manifest are out of step.
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( cd "$REPO_DIR/nodejs" && { npm ci --omit=dev || npm install --omit=dev; } )
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openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 -subj '/CN=sni-support-required-for-valid-ssl' -keyout /etc/ssl/resty-auto-ssl-fallback.key -out /etc/ssl/resty-auto-ssl-fallback.crt
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echo "==> Services"
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systemctl daemon-reload
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systemctl enable --now proxy.service
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systemctl restart proxy.service
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mkdir /etc/openresty/sites-enabled/
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wget -q https://raw.githubusercontent.com/theta42/proxy/refs/heads/master/ops/nginx_conf/nginx.conf -O /etc/openresty/nginx.conf
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wget -q https://raw.githubusercontent.com/theta42/t42-common/master/templates/openresty/autossl.conf.erb -O /etc/openresty/autossl.conf
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wget -q https://raw.githubusercontent.com/theta42/t42-common/master/templates/openresty/010-proxy.conf.erb -O /etc/openresty/sites-enabled/000-proxy
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wget -q https://raw.githubusercontent.com/theta42/proxy/master/ops/proxy.service -O /etc/systemd/system/proxy.service
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# Validate the OpenResty config before (re)starting so a bad edit can't take
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# the proxy down; reload if already running, otherwise start it.
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if openresty -t; then
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systemctl reload openresty 2>/dev/null || systemctl restart openresty
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else
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echo "openresty config test FAILED -- not reloading" >&2
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exit 1
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fi
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mkdir /var/log/nginx
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mkdir /var/www
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cd /var/www
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git clone https://github.com/theta42/proxy.git
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cd proxy/nodejs
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npm install
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wget -q https://raw.githubusercontent.com/theta42/proxy/refs/heads/master/ops/nginx_conf/targetinfo.lua -O /usr/local/openresty/lualib/targetinfo.lua
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systemctl start proxy.service
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systemctl enable proxy.service
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echo "==> Done. Update later with: sudo BRANCH=${BRANCH} $0"
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