48 lines
1.4 KiB
Bash
Executable File
48 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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set -eux
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set -o pipefail
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write_entries() {
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local file="$1"
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local entries="$2"
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# Don't do anything if the file isn't there
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if [ ! -f "$file" ]; then
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return
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fi
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if grep -q "^# HEAT_HOSTS_START" "$file"; then
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temp=$(mktemp)
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(
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sed '/^# HEAT_HOSTS_START/,$d' "$file"
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echo -ne "\n# HEAT_HOSTS_START - Do not edit manually within this section!\n"
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echo "$entries"
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echo -ne "# HEAT_HOSTS_END\n\n"
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sed '1,/^# HEAT_HOSTS_END/d' "$file"
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) > "$temp"
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echo "INFO: Updating hosts file $file, check below for changes"
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diff "$file" "$temp" || true
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cat "$temp" > "$file"
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else
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# NOTE(aschultz): we purge any entries in the hosts file that match
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# the existing short hostname on initial installation only. This
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# prevents existing data from coming through and causing deployment
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# issues when services (I'm looking at you rabbitmq) start up.
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sed -i "/$(hostname -s)/d" "$file"
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echo -ne "\n# HEAT_HOSTS_START - Do not edit manually within this section!\n" >> "$file"
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echo "$entries" >> "$file"
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echo -ne "# HEAT_HOSTS_END\n\n" >> "$file"
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fi
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}
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hosts="WRITE_HOSTS"
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if [ ! -z "$hosts" ]; then
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for tmpl in /etc/cloud/templates/hosts.*.tmpl ; do
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write_entries "$tmpl" "$hosts"
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done
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write_entries "/etc/hosts" "$hosts"
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else
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echo "No hosts in Heat, nothing written."
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fi
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