85 lines
No EOL
2.9 KiB
Bash
85 lines
No EOL
2.9 KiB
Bash
#!/usr/bin/env bash
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# =============================================================================
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# run_once_05-install-hosts.sh.tmpl
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# Merge LAN host entries into /etc/hosts so omp / config / curl can
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# resolve miche.local, kaiser.local, etc. by name.
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#
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# Idempotent: re-running this script is safe; it just rewrites the same
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# block of LAN entries. Won't touch non-LAN entries.
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#
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# Skipped on boxes where /etc/hosts is cloud-init managed (e.g. cloud
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# VMs) — they need a different strategy (cloud-init module).
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# =============================================================================
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set -euo pipefail
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log() { printf '\033[1;34m[hosts]\033[0m %s\n' "$*"; }
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HOSTS_FILE="/etc/hosts"
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LAN_BLOCK_BEGIN="# >>> lan-hosts-managed-by-chezmoi >>>"
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LAN_BLOCK_END="# <<< lan-hosts-managed-by-chezmoi <<<"
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# Skip on cloud-init managed hosts
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if [[ -f /etc/cloud/cloud.cfg ]] && grep -q "manage_etc_hosts" /etc/cloud/cloud.cfg; then
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log "WARNING: /etc/hosts is cloud-init managed on this box"
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log " add LAN host entries to your cloud-init config instead"
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exit 0
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fi
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# LAN host entries to merge. Keep in sync with /etc/hosts on existing
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# boxes (miche, kaiser, byte) so all boxes agree.
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LAN_ENTRIES=$(cat <<'LAN_HOSTS'
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192.168.1.208 tadbit.local
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192.168.1.91 byte.local
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192.168.1.194 bit.local
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192.168.1.103 dayold.local
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192.168.1.212 rorclar.local
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192.168.1.153 ggbuttz.local
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192.168.1.219 bazzite.local
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192.168.1.107 crouton.local
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192.168.1.215 rye.local
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192.168.1.172 miche.local
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192.168.1.65 kaiser.local
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192.168.1.118 riska.local
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192.168.1.19 nibble.local
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LAN_HOSTS
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)
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# Build the new block
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NEW_BLOCK="$LAN_BLOCK_BEGIN
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$LAN_ENTRIES
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$LAN_BLOCK_END"
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# Read current hosts file
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if [[ ! -f "$HOSTS_FILE" ]]; then
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log "ERROR: $HOSTS_FILE missing — cannot merge LAN entries"
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exit 1
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fi
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# If our block already exists with all entries, skip. Otherwise rewrite.
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# This avoids a no-op sudo prompt on boxes that already have the block.
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if grep -q "$LAN_BLOCK_BEGIN" "$HOSTS_FILE" 2>/dev/null \
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&& grep -q "miche.local" "$HOSTS_FILE" 2>/dev/null \
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&& grep -q "bit.local" "$HOSTS_FILE" 2>/dev/null; then
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log "LAN block already present in $HOSTS_FILE; skipping"
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exit 0
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fi
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# If our block exists but is stale (missing some entries), remove it first
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if grep -q "$LAN_BLOCK_BEGIN" "$HOSTS_FILE"; then
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log "stale LAN block detected; removing before re-adding"
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sudo cp "$HOSTS_FILE" "${HOSTS_FILE}.bak.$(date +%s)"
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sudo sed -i "/$LAN_BLOCK_BEGIN/,/$LAN_BLOCK_END/d" "$HOSTS_FILE"
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fi
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# Append the new block
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log "appending LAN block to $HOSTS_FILE"
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echo "" | sudo tee -a "$HOSTS_FILE" >/dev/null
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echo "$NEW_BLOCK" | sudo tee -a "$HOSTS_FILE" >/dev/null
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echo "" | sudo tee -a "$HOSTS_FILE" >/dev/null
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# Verify by checking one of the entries
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if grep -q "miche.local" "$HOSTS_FILE"; then
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log "verified miche.local is now resolvable"
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else
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log "WARNING: miche.local not in $HOSTS_FILE after merge"
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fi |