e34cfb63d9
When we initially install our heat hosts configuration, we need to make sure the short hostname for the host is not currently defined within the hosts file as it will conflict with our definitions later in the file. We only do this on initial installation as we don't want to touch the file after the initial deployment outside of the matching host entries. This also is restricted to just the short hostname which is consumed via the configuration management for determining bootstrap configurations as well as used by some services during startup (rabbitmq) Change-Id: If55cf8f90ee7be4acd40fda1f72bb1f31d218b57 Related-Blueprint: all-in-one
47 lines
1.4 KiB
Bash
Executable File
47 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" >> "$file"
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fi
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}
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if [ ! -z "$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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