如何在Jinja2宏中转义特殊字符？
如何在Jinja2宏中转义特殊字符？
提问于 2014-01-16 05:26:58
我正在编写一个返回cronjob语法的宏，如下所示：
{%- macro passive_check(state, service) -%}
{%- set state_checks = salt['monitoring.discover_checks_passive'](state) %}
{% for host in pillar['shinken_pollers'] %}
*/{{ state_checks[service]['passive_interval'] }} * * * * nagios output=$({{ state_checks[service]['check_command'] }}); return_code=$?; printf "%s\t%s\t%s\t%s\n" "{{ grains['id'] }}" "{{ service }}" "$return_code" "$output" | /usr/local/nagios/bin/py_send_nsca -H {{ host }} -c /etc/send_nsca.conf
{%- endfor -%}
{%- endmacro %}然后在一个.sls文件中，它被称为：
{% from 'nrpe/passive.sls' import passive_check with context %}
{%- for state in pillar['monitoring']['states'] -%}
{%- for name in salt['monitoring.discover_checks_passive'](state) %}
/etc/cron.d/passive-checks:
file:
- append
- text: |
{{ passive_check(state, name)|safe }}
{%- endfor -%}
{%- endfor %}但是，在运行时，我得到了以下错误：
Rendering SLS rsyslog.nrpe failed, render error: while scanning an alias
in "<unicode string>", line 29, column 1:
*/5 * * * * nagios output=$(/usr ...
^
expected alphabetic or numeric character, but found '/'
in "<unicode string>", line 29, column 2:
*/5 * * * * nagios output=$(/usr/ ...
^使用|e手动转义也会返回相同的错误。
所以问题是:如何转义这些字符：*，/，.在Jinja2宏中？
回答 1
Stack Overflow用户
回答已采纳
发布于 2014-01-16 16:56:51
您可能会感到惊讶，但不需要转义这些角色。
导致错误expected alphabetic or numeric character, but found '/'的罪魁祸首是..。白空间控制。请注意宏：
{%- set state_checks = salt['monitoring.discover_checks_passive'](state) %}
{% for host in pillar['shinken_pollers'] %}
*/{{ state_checks[service]['passive_interval'] }} * * * * nagios output=$({{ state_checks[service]['check_command'] }}); return_code=$?; printf "%s\t%s\t%s\t%s\n" "{{ grains['id'] }}" "{{ service }}" "$return_code" "$output" | /usr/local/nagios/bin/py_send_nsca -H {{ host }} -c /etc/send_nsca.conf如果没有减号(-)在set和for块的末尾，它将呈现为如下所示：
/etc/cron.d/passive-checks:
file:
- append
- text: |
*/5 * * * * nagios output=$/usr/lib/nagios/plugins/check_procs -c 1:1 -C rsyslogd -u syslog; return_code=$?; printf "%s\t%s\t%s\t%s\n" "q-mail" "rsyslogd_proc
s" "$return_code" "$output" | /usr/local/nagios/bin/py_send_nsca -H host1 -c /etc/send_nsca.conf
*/5 * * * * nagios output=$/usr/lib/nagios/plugins/check_procs -c 1:1 -C rsyslogd -u syslog; return_code=$?; printf "%s\t%s\t%s\t%s\n" "q-mail" "rsyslogd_proc
s" "$return_code" "$output" | /usr/local/nagios/bin/py_send_nsca -H host2 -c /etc/send_nsca.conf因此，您必须删除空白行：
{%- macro passive_check(state, service) -%}
{%- set state_checks = salt['monitoring.discover_checks_passive'](state) -%}
{%- for host in pillar['shinken_pollers'] -%}
*/{{ state_checks[service]['passive_interval'] }} * * * * nagios output=$({{ state_checks[service]['check_command'] }}); return_code=$?; printf "\%s\t\%s\t\%s\t\%s\n" "{{ grains['id'] }}" "{{ service }}" "$return_code" "$output" | /usr/local/nagios/bin/py_send_nsca -H {{ host }} -c /etc/send_nsca.conf
{% endfor -%}
{%- endmacro %}(请注意，为了使它在crontab中工作，我必须转义百分比符号)
并在调用file.append状态时放置缩进：
{%- for state in pillar['monitoring']['states'] -%}
{%- for name in salt['monitoring.discover_checks_passive'](state) %}
/etc/cron.d/passive-checks:
file:
- append
- text: |
{{ passive_check(state, name)|indent(8) }}
- require:
- file: touch_cron
{%- endfor -%}
{%- endfor %}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/21153986
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